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Modification effect and mechanism of steel slag using multiple interface modifiers based on stearic acid coupling agent 认领 引用 被引量：1
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作者 Ling Zhao Yu-rong Xia +5 位作者 Hai-lin Fei Hong-ming Long Hao Zhang Yan Bai Yi-fan Wang Xiao-jian Ren 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2025年第6期1555-1567,共13页
Steel slag(SS)accumulates unavoidably due to its complex and unstable composition,high production volumes,and limited value-added resource utilization.Single or multiple interface modifiers were proposed to enhance th... Steel slag(SS)accumulates unavoidably due to its complex and unstable composition,high production volumes,and limited value-added resource utilization.Single or multiple interface modifiers were proposed to enhance the properties of SS through high-speed dispersion,transforming its inherent hydrophilic and oleophobic characteristics into hydrophily and lipophilicity.The modification effects were innovatively assessed by observing the color changes of modified steel slag solutions following the dissolution-settlement equilibrium constant.This approach avoided human-induced errors and improved estimated accuracy in conformance with conventional methods such as oil absorption value,activation index,sedimentation volume,and lipophilicity.The hydrolysis of 3-aminopropyltriethoxysilane(KH)generated–Si(OH)3structure to form hydrogen or covalent bonds with active substances(OH groups)from SS.Concurrently,SS underwent encapsulation via Si–O–Si structure resulting from the dehydration of–Si(OH)3.The stearic acid coupling agent(SA),aluminate coupling agent(AC),and titanate coupling agent(TN)underwent chemical reactions with Ca(OH)2,Al(OH)3,and CaCO3in SS.The acidic SA primarily created stable chemical bonds and acted as a supplement due to its package,reducing surface activity and hydrophilicity while enhancing lipophilicity.Specifically,the optimal modification effect was obtained at 3 wt.%SA.Consequently,3 wt.%SA was established as the benchmark for multiple modifiers and the most effective combination was 3 wt.%SA and 3 wt.%AC.Compared with a single interface modifier,SA corroded the SS surface to provide numerous active sites for further modification by KH,AC,or TN,resulting in a more densely packed structure.In addition,more organic groups on SS prevent the proximity of other particles from agglomerating to achieve dispersion and a synergistic modification,laying a theoretical foundation of SS in a new pathway for organic composite materials. 展开更多
关键词 Steel slag Single interface modifier Multiple interface modifier Modification mechanism
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Interfering small ubiquitin modifiers(SUMO)exhibits apple's enhanced tolerance to nitrogen deficiency 认领 引用 被引量：4
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作者 Zeyuan Liu Ziqing Ma +9 位作者 Jia Li Ningning Bian Zitong Guo Jianyan Guo Shuang Zhao Baohua Chu Chundong Niu Fengwang Ma Qingmei Guan Xuewei Li 《Fruit Research》 2023年第1期142-150,共9页
Nitrogen is one of the most critical macroelements required for apple biomass accumulation and quality formation.Thus,identification and characterization of candidate genes involved in nitrogen deficiency stress is of... Nitrogen is one of the most critical macroelements required for apple biomass accumulation and quality formation.Thus,identification and characterization of candidate genes involved in nitrogen deficiency stress is of great importance to the sustainable development of the apple industry.SUMOylation is a kind of post-translational modification,which is widely involved in plant life processes,including responses to nitrogen(N)deficiency.Here,we identified apple small ubiquitin modifiers(SUMO)that participated in responding to nitrogen deficiency.Firstly,all isoforms of apple SUMOs were induced by N deficiency stress.Under N deficiency stress conditions,the MdSUMO2 RNAi transgenic apple plants showed better growth potential than the wild type GL-3,including more new leaves,increased height,thicker stems,and heavier fresh weight.In addition,the MdSUMO2 RNAi transgenic apple plants exhibited darker green leaves and greater root volume than GL-3 in response to N deficient conditions.Finally,the activated glutamine synthetase(GS)activity,nitrate reductase(NR)activity,as well as the induced expression of genes involved in nitrogen assimilation in the root might contribute to the tolerance of MdSUMO2 RNAi transgenic apple plants in response to nitrogen deficiency.Taken together,our finding provides insight to further study the mechanisms underlying the essential roles of apple MdSUMOs in responding to N deficient conditions. 展开更多
关键词 sustainable development characterization candidate genes Sumoylation Nitrogen deficiency Apple Glutamine synthetase Nitrate reductase apple small ubiquitin modifiers sumo
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Research advancements in phosphogypsum crystal modifiers 认领 引用 被引量：2
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作者 LI Yi-lin LI Sheng-long +4 位作者 ZHANG Ruo-qing JIANG Ji-zhou XIANG Kun Arramel ZOU Jing 《Journal of Central South University》 SCIE EI CAS CSCD 2024年第11期4098-4119,共22页
The excessive demand for phosphorus-based fertilizers is contributing to the undesired byproduct of phosphogypsum(PG),typically found in large quantities in phosphoric acid industry.Without proper management,this indu... The excessive demand for phosphorus-based fertilizers is contributing to the undesired byproduct of phosphogypsum(PG),typically found in large quantities in phosphoric acid industry.Without proper management,this industrial waste poses a significant environmental pollution risk.Current technologies are struggle to effectively handle the volume of PG produced,but one promising solution is its conversion into hemihydrate gypsum(CaSO4·0.5 H2O,HH).HH can exist in two phases,α-HH andβ-HH,withα-hemihydrate gypsum(α-HH)being preferred for its complete crystal structure and lower water requirement for hydration.The morphology ofα-HH gypsum is crucial for its material applications,and controlling crystal morphology is possible through the use of suitable crystal modifiers.This review explores various aspects of crystal modifiers and highlights their role in the preparation ofα-HH from PG.It suggests that leveraging the interfacial properties of PG could lead to innovative applications.Additionally,the review outlines future directions for PG development and identifies challenges to be addressed in the next steps. 展开更多
关键词 phosphogypsum hemihydrate gypsum crystal modifiers
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Individual-level modifiers of the acute effects of air pollution on mortality in Wuhan,China 认领 引用 被引量：2
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作者 Peirong Zhong Shichun Huang +4 位作者 Xiaotong Zhang Simin Wu Yaohui Zhu Yang Li Lu Ma 《Global Health Research and Policy》 2018年第1期109-117,共9页
Background:Ambient air pollution has posed negative effects on human health.Individual-level factors may modify this effect,but previous studies have controversial conclusions,and evidence is lacking especially in dev... Background:Ambient air pollution has posed negative effects on human health.Individual-level factors may modify this effect,but previous studies have controversial conclusions,and evidence is lacking especially in developing countries.This study aims to examine the modifying effects of sex,age,and education level of individuals on the associated between daily mortality and air pollutants,including particulate matter<10μm in aerodynamic diameter(PM10),sulfur dioxide(SO2),and nitrogen dioxide(NO2).Methods:Time-series analysis was conducted to investigate the acute effects of the air pollution on daily mortality from January 2002 to December 2010 in Wuhan,China.Generalized Additive Models(GAM)were used to examine the association stratified by sex for non-accidental,cardiovascular,and respiratory mortality.For non-accidental mortality,stratified analysis was also conducted by age and educational level.Results:Outdoor air pollution was associated with daily non-accidental and cardiovascular mortality.An increase of 10μg/m3 in a 2-day average concentration of PM10,SO2,and NO2 was corresponding to the increase in non-accidental mortality of 0.29%(95%CI:0.06-0.53%),1.22%(95%CI:0.77-1.67%)and 1.60%(95%CI:1.00-2.19%),respectively.The effects of air pollution were faster in females than males.The magnitude of the estimates was higher for females with low education,aged 65-75 years for PM10 and<65 years for SO2.To be more specific,we observed that per 10μg/m3 increase in SO2 was association with increases in non-accidental mortality of 2.03%(95%CI:1.38-2.67)for all females and 3.10%(95%CI:2.05-4.16)for females with low education.Conclusion:Females and people with low-education are more susceptible to the effect of air pollution,which would provide a sound scientific basis for determination of air pollution standards. 展开更多
关键词 Air pollution Mortality Effect modifiers Susceptible subpopulation
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Effects of Plasticizers,Antioxidants and Burning Rate Modifiers on Aging Performance of the HTPB/HMDI Composite Solid Propellant 认领 引用 被引量：1
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作者 Ahmed M Enew Ehab Abadir +1 位作者 Sahar Elmarsafy Karim K Elsharkawy 《含能材料》 EI CAS CSCD 北大核心 2019年第1期21-27,90,共7页
The effects of plasticizers,antioxidants and burning rate modifiers on the aging performance of the composite solid propellant based on hydroxyl-terminated polybutadiene(HTPB)/hexamethylene diisocyanate(HMDI)were expl... The effects of plasticizers,antioxidants and burning rate modifiers on the aging performance of the composite solid propellant based on hydroxyl-terminated polybutadiene(HTPB)/hexamethylene diisocyanate(HMDI)were explored by apply-ing an accelerated aging program for 90 day at 70 ℃. The HTPB propellant matrix with the diisooctyl sebacate(DOS)as plasti-cizers and diisooctyl azelate(DOZ), antioxidants as N,N ′-Diphenyl-p-phenylenediamine(AO) and 2,2′-methylenebis(4-methyl-6-tert-butylphenol)(cyanox 2246)and burning rate modifiers as barium ferrite(BF),copper chromites(CC)and fer-ric oxide(FO)were varied. Results show that sample(S1)which based on DOS decreases the stress value and increases the strain value which considered to be an excellent start for aging program. Sample(S3)containing AO presents the higher resis-tance to oxidation showing the better performance that reflects on increasing the shelf life of the composite solid propellant mo-tor. Sample(S5)which based on BF enhances the ballistic performance among over the other tested two samples. The accelerat-ed aging program allowed us to estimate the motor in-service lifetime. 展开更多
关键词 polybutadiene(HTPB)/hexamethylene diisocyanate(HMDI)composite solid propellant plasticizers antioxidants burning rate modifiers aging program
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Morphology Control of SrCO_3 Crystals using Complexons as Modifiers in the Ethanol-water mixtures 认领 引用 被引量：3
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作者 张明轩 霍冀川 +2 位作者 于永生 崔彩萍 雷永林 《Chinese Journal of Structural Chemistry》 SCIE CAS 北大核心 2008年第10期1223-1229,共7页
Using SrC12-6H2O and Na2CO3 as the main raw materials and adding different complexons as modifiers with simple co-precipitation method, SrCO3 crystals with distinct morphologies like spherical, bundle-like, overlappin... Using SrC12-6H2O and Na2CO3 as the main raw materials and adding different complexons as modifiers with simple co-precipitation method, SrCO3 crystals with distinct morphologies like spherical, bundle-like, overlapping plate-like, hexagonal star-like, dumbbell-like, etc. can be synthesized in the ethanol-water mixtures. The samples were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and Fourier transform infrared spectrograph （FT-IR）. The interrelated effect mechanism is presented in the end. Results show that the modifier carboxyl groups play a significant role in controlling the SrCO3 crystal morphologies, which can alter the crystal growth unit （Sr^2＋） supply mode and induce the crystal formation with the morphologies matching their spatial configurations. 展开更多
关键词 SrCO3 complexon modifier morphology control ethanol-water mixtures
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Influence of SBS modifiers on viscoelastic mechanical behavior of modified asphalt 认领 引用 被引量：3
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作者 孟勇军 张肖宁 逯彦秋 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2010年第2期157-160,共4页
In order to verify the influence of different block proportions S/B on the effect of SBS modified asphalt,the dynamic mechanical performance test and static loading test were performed on the samples composed of diffe... In order to verify the influence of different block proportions S/B on the effect of SBS modified asphalt,the dynamic mechanical performance test and static loading test were performed on the samples composed of different kinds of SBS with base asphalt. It is found that different S/B values fix on different modified effects and different viscoelastic mechanical behaviors,due to biphasic separate fabric of polybutadiene and polystyrene in SBS. In low-speed running pavement,the modified asphalt with lower S/B value shows better pavement performance,while in high-speed running pavement,the modified asphalt with higher S/B value shows better pavement performance. As far as SBS modified asphalt itself is concerned,mixing proportion impacts on resisting displacement and block proportion S/B ratio impacts on strain recovery capacity. In the case that the conditions are the same,SBS modified asphalt with different S/B values can be used for different travelling speed pavement construction demands to get an intelligent use. 展开更多
关键词 SBS modifier block proportion dynamic mechanical test static loading test
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An experimental study on the effects of friction modifiers on wheel-rail dynamic interactions with various angles of attack 认领 引用 被引量：1
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作者 Zhen Yang Pan Zhang +1 位作者 Jan Moraal Zili Li 《Railway Engineering Science》 2022年第3期360-382,共23页
By modifying friction to the desired level,the application of friction modifiers(FMs)has been considered as a promising emerging tool in the railway engineering for increasing brakingraction force in poor adhesion con... By modifying friction to the desired level,the application of friction modifiers(FMs)has been considered as a promising emerging tool in the railway engineering for increasing brakingraction force in poor adhesion conditions and mitigating wheelail interface deterioration,energy consumption,vibration and noise.Understanding the effectiveness of FMs in wheel–rail dynamic interactions is crucial to their proper applications in practice,which has,however,not been well explained.This study experimentally investigates the effects of two types of top-of-rail FM,i.e.FM-A and FM-B,and their application dosages on wheel–rail dynamic interactions with a range of angles of attack(AoAs)using an innovative well-controlled V-track test rig.The tested FMs have been used to provide intermediate friction for wear and noise reduction.The effectiveness of the FMs is assessed in terms of the wheel–rail adhesion characteristics and friction rolling induced axle box acceleration(ABA).This study provides the following new insights into the study of FM:the applications of the tested FMs can both reduce the wheel–rail adhesion level and change the negative friction characteristic to positive;stick–slip can be generated in the V-Track and eliminated by FM-A but intensified by FM-B,depending on the dosage of the FMs applied;the negative friction characteristic is not a must for stick–slip;the increase in ABA with AoA is insignificant until stick–slip occurs and the ABA can thus be influenced by the applications of FM. 展开更多
关键词 Friction modifier V-track test rig Adhesion Wheel–rail dynamic interaction Angle of attack Axle box acceleration
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Deciphering the modifiers for phenotypic variability of X-linked adrenoleukodystrophy 认领 引用 被引量：3
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作者 Shruti V Palakuzhiyil Rita Christopher Sadanandavalli Retnaswami Chandra 《World Journal of Biological Chemistry》 2020年第3期99-111,共13页
X-linked adrenoleukodystrophy(X-ALD),an inborn error of peroxisomalβ-oxidation,is caused by defects in the ATP Binding Cassette Subfamily D Member 1(ABCD1)gene.X-ALD patients may be asymptomatic or present with sever... X-linked adrenoleukodystrophy(X-ALD),an inborn error of peroxisomalβ-oxidation,is caused by defects in the ATP Binding Cassette Subfamily D Member 1(ABCD1)gene.X-ALD patients may be asymptomatic or present with several clinical phenotypes varying from severe to mild,severe cerebral adrenoleukodystrophy to mild adrenomyeloneuropathy(AMN).Although most female heterozygotes present with AMN-like symptoms after 60 years of age,occasional cases of females with the cerebral form have been reported.Phenotypic variability has been described within the same kindreds and even among monozygotic twins.There is no association between the nature of ABCD1 mutation and the clinical phenotypes,and the molecular basis of phenotypic variability in X-ALD is yet to be resolved.Various genetic,epigenetic,and environmental influences are speculated to modify the disease onset and severity.In this review,we summarize the observations made in various studies investigating the potential modifying factors regulating the clinical manifestation of X-ALD,which could help understand the pathogenesis of the disease and develop suitable therapeutic strategies. 展开更多
关键词 X-adrenoleukodystrophy Cerebral adrenoleukodystrophy Adrenomyeloneuropathy Phenotypic variation Modifiers
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Influence of Modifiers on Supercritical Fluid Chromatography (SFC) and Supercritical Fluid Extraction (SFE), Part I 认领 引用 被引量：2
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作者 Ilia Brondz Boris Sedunov Nagarajan Sivaraman 《International Journal of Analytical Mass Spectrometry and Chromatography》 2017年第2期17-39,共23页
It is important to understand the mechanism and implications of different modifiers on analytical and preparative processes under chromatography with supercritical fluids (SFs) and under extraction with SFs. Supercrit... It is important to understand the mechanism and implications of different modifiers on analytical and preparative processes under chromatography with supercritical fluids (SFs) and under extraction with SFs. Supercritical fluid chromatography (SFC) and supercritical fluid extraction are generally carried out with neat supercritical carbon dioxide (SCCO2) or with SCCO2 containing modifiers (or cosolvents), especially for strongly polar compounds. For example, methanol is added as a cosolvent/modifier to SCCO2 for the extraction/separation of polar compounds. This paper discusses the influence of the modifier on the colligative properties of the principal mobile phase, which may define the situation in the total mobile phase in a chromatography column or in parts of a column under SFC. No colligative behavior of solutions reflects individual properties of the solutes. Their cross-interactions with solvents are discussed. 展开更多
关键词 Supercritical Fluid (SF) Supercritical Fluid Chromatography (SFC) Supercritical Fluid Extraction (SFE) Modifiers Influence of Modifiers Colligative Properties Thermodynamics-Based Evaluation of Binary Mixtures Phase Equilibria
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Molecular Simulation of the Interactions Between Dispersants and Organic Friction Modifiers on the Dispersion Performance of Lubricants 认领 引用
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作者 Liu Qiong Long Jun +3 位作者 Huang Zuoxin Zhao Yi Zeng Yinfeng Wang Nan 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS CSCD 2024年第4期96-104,共9页
The effect of combining different organic friction modifiers(OFMs)with ashless dispersants on the dispersion performance of lubricant oils in sludge was investigated using molecular dynamics(MD)simulations.polyisobuty... The effect of combining different organic friction modifiers(OFMs)with ashless dispersants on the dispersion performance of lubricant oils in sludge was investigated using molecular dynamics(MD)simulations.polyisobutylsuccinimide(PIBSI)was mixed with either glycerol monooleate(GMO)or oleamide(OAM)in a poly-α-olefin(PAO)base oil.The distribution and interaction energy of sludge precursors were analyzed both with and without these additive mixtures.The results show that both the OFMs and dispersants can form hydrogen bonds with sludge precursor molecules,preventing further aggregation.Adding OFMs to lubricant oil-containing dispersants enhances the dispersion of the lubricant.Compared to OAM,GMO forms more hydrogen bonds with sludge precursors,which favors improved dispersion.However,there is strong competition and interaction between GMO and PIBSI,which reduces the dispersant’s effectiveness in mitigating sludge precursor aggregation.The interactions among additives and their impact on performance should be considered when designing high-performance lubricant formulations. 展开更多
关键词 dispersant organic fiction modifier dispersion interaction hydrogen bond
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Application of CX-type modifiers in Al-Si alloys 认领 引用
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作者 ShufangYao WeiminMao +4 位作者 XueyouZhong KaikeCai ZidongWang LeiMao juxiangYang 《Journal of University of Science and Technology Beijing》 2003年第2期34-38,共5页
The modification effect of CX-type (CX means the modifiers that have longeffective term) modifiers applied in ZL108 and ZL104 Al-Si alloys has been studied in detail. Theresults show that the morphologies of the eutec... The modification effect of CX-type (CX means the modifiers that have longeffective term) modifiers applied in ZL108 and ZL104 Al-Si alloys has been studied in detail. Theresults show that the morphologies of the eutectic silicon and the primary silicon can be modifiedand refined simultaneously. The modification effect acts quickly and can maintain a period of 8 h bythe CX-type modifiers. The CX-type modifiers increase the mechanical properties of Al-Si alloys andimprove the service properties of machine parts made of Al-Si alloys (such as piston and cylinderetc.). In modifying processes, the amount of the addition of CX-type modifiers is smaller than thatof any other modifiers, and the modifying procedures are simple. There are no smoke, no dust, and noirritant smell in modifying processes using CX-type modifiers. Therefore, the CX-type modifiershave advantages in economy and environment protection. 展开更多
关键词 Al-Si alloys CX-type modifier double modification strontium phosphorus sodium
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Effects of Modifiers on the Anti-wetting and Anti-icing Property of Aluminum Surface 认领 引用 被引量：2
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作者 RUAN Min XU Junjie +6 位作者 FAN Shilin CHEN Ying WU Hang CHANG Zhongwei CHEN Yue ZHAO Dongnan LU Lilin 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2021年第1期143-147,共5页
The effects of modifiers on the anti-wetting and anti-icing property of the prepared rough aluminum surface were investigated.The rough aluminum substrates were obtained through electrochemical oxidization with 15 wt%... The effects of modifiers on the anti-wetting and anti-icing property of the prepared rough aluminum surface were investigated.The rough aluminum substrates were obtained through electrochemical oxidization with 15 wt% sulfuric acid solution as the electrolyte at the constant current of 4 mA for 3 h.And then they were modified with octadecanoic acid (C18),polyethylene (PE),polystyrene (PS),polyethylene glycol (PEG) and hexamethylenetetramine (HMTA),respectively,whose surface free energies were 27.6,31.0,33.0,61.6 and 70.0 mN/m,respectively.The contact angles (CA) were 154.6°,128.4°,127.6°,5.0° and 0.0°,respectively,and the ice adhesion pressures were 15.9,36.3,55.9,155.3 and 216.1 kPa,respectively.The ice adhesion strengths decrease along with the increasing anti-wetting property of aluminum surfaces and the decreasing of the surface energy of modifiers.These provide some new insights when designing the aluminum surface with anti-icing properties in some special applications. 展开更多
关键词 modifier aluminum hydrophobicity ice adhesion surface energy
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Influence of Modifiers, Extractants, and Trappers on Lipid Composition with Liquids in Standard State Extraction, Supercritical Fluid Extraction and Trapping by Supercritical Fluid Extraction, Part II 认领 引用
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作者 Ilia Brondz 《International Journal of Analytical Mass Spectrometry and Chromatography》 2017年第4期87-95,共9页
Modifiers have a broad array of influences on extraction with liquids in standard state, supercritical fluid extraction (SFE), trapping by SFE and supercritical fluid chromatography (SFC). They can significantly chang... Modifiers have a broad array of influences on extraction with liquids in standard state, supercritical fluid extraction (SFE), trapping by SFE and supercritical fluid chromatography (SFC). They can significantly change the qualitative and quantitative results. Quantitative and qualitative results can be influenced by different extractants and modifiers in different ways as it was shown by Brondz et al. at 2007 in “The real nature of the indole alkaloids in Cortinarius infractus: Evaluation of artifact formation through solvent extraction method development”, J. Chromatography A, 1148, 1-7. The choice of correct extractant, modifier, and trapper to the bulk mobile phase for supercritical fluids (SFs) or for liquids in subcritical or in the liquids in standard state is a challenge in any extraction procedure. This is the second paper in a sequence that describes the influence of extractants and modifiers on the performance of SFs and results of extraction with liquids in standard state and SFE. Here, attention is given to possible mistakes in qualitative and quantitative results by poor understanding of the influence of extractants, modifiers, and trappers on extraction and trapping process by a careless choice of extractant, modifier, and trapper for extraction with liquids in standard state and SFE. The SF chosen for discussion in the paper is CO2. However, similar effects can be observed with use of other SFs and fluids in subcritical and standard states. In this paper, the discussion of lipids, fatty and carboxylic acids have been chosen as target analytes for extraction, trapping and analysis. Some examples from extraction with liquids in the standard state and trapping in the supercritical state (collection) have been furnished with the wrong extractant, modifier, or trapper which is presented for illustration of inappropriate choice of extractants, modifiers, and trappers. 展开更多
关键词 Modifiers Extractants Trappers Supercritical Fluid Chromatography Supercritical Fluid Extraction Extraction with Liquids in Standard State Lipids Fatty Acids Carboxylic Acids Extraction of Fatty and Carboxylic Acids
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Effects of different modifiers on the properties of wood-polymer composites 认领 引用 被引量：8
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作者 许民 才智 《Journal of Forestry Research》 CAS 2004年第1期77-79,J004,共3页
Wood-polymer composites (WPC) were prepared from wood fiber and four kinds of plastics such as PE, PS, ABS, and SAN. The effects of different modifiers on the mechanical properties of the composites were studied. The ... Wood-polymer composites (WPC) were prepared from wood fiber and four kinds of plastics such as PE, PS, ABS, and SAN. The effects of different modifiers on the mechanical properties of the composites were studied. The results showed modifiers could raise the bonding strength of wood fiber with polymer and improve the mechanical properties of the composites. Different modifiers had different effects on the properties of wood-polymer composites, and comparatively the modifier of isocyanate produced a better result. Wood-polymer composite takes not only the advantages of both wood fiber and polymer, but waterproof, dimensional stability and dynamic strength are also significantly improved. Key word Wood fiber - Thermoplastic polyester - Wood-polymer composites - Modifier - Mechanical properties CLC number TB332 Document code A Foundation item: This study was supported by the Harbin Technology Tackle Key Plan (Development Research of Wood-Polymer Composites with High Wood Matrix) and by Heilongjing Nature Science Fund (Composite Mechanism Study of the Wood Polymer).Biography: XU Min (1963-), Female, Associate professor in Material Science and Engineering College, Northeast Forestry University, Harbin 150040, P. R. China.Responsible editor: Chai Ruihai 展开更多
关键词 Wood fiber Thermoplastic polyester Wood-polymer composites Modifier Mechanical properties
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INFLUENCES OF MODIFIERS ON SURFACE PROPERTIES OF WHITE CARBON BLACK AND MECHANICAL PROPERTIES OF SILICONE RUBBER 认领 引用 被引量：4
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作者 D.M. Zheng, J. Yan and B.Q. Jiang Chemical Engineering Department of Nanchang University, Nanchang 330029, China 《Acta Metallurgica Sinica(English Letters)》 EI CAS 1999年第5期1090-1093,共4页
Various of modifiers were used to modify the surface activity of white carbon black. The oil absorption, viscosity, hydrophobic rate and burning loss of white carbon black and the mechanical propertiess of silicone ru... Various of modifiers were used to modify the surface activity of white carbon black. The oil absorption, viscosity, hydrophobic rate and burning loss of white carbon black and the mechanical propertiess of silicone rubber were measured. The influences of the modifiers on the properties of white carbon black and the mechanical properties of silicone rubber were discussed. 展开更多
关键词 white carbon black modifier silicone rubber
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Effect of Network Modifiers on Spectroscopic Properties of Erbium-doped Phosphate Glasses 认领 引用
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作者 杨钢锋 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2005年第1期60-63,共4页
The integrated absorption cross section Σ abs, peak emis sion cross section σ emi, Judd-Ofeld intensity parameters Ω t(t=2,4,6), and spontaneous emission probability A R of Er 3+ ions were determined fo r Erbium do... The integrated absorption cross section Σ abs, peak emis sion cross section σ emi, Judd-Ofeld intensity parameters Ω t(t=2,4,6), and spontaneous emission probability A R of Er 3+ ions were determined fo r Erbium doped alkali and alkaline earth phosphate glasses. It is found the comp ositional dependence of σ emi is almost similar to that of Σ abs, wh ich is determined by the sum of Ω t (3Ω 2+10Ω 4+21Ω 6). In addition, the compositional dependence of Ω t was studied in these glass systems. As a resu lt, compared with Ω 4 and Ω 6, the Ω 2 has a stronger compositional depend ence on the ionic radius and content of modifiers. The covalency of Er-O bonds in phosphate glass is weaker than that in silicate glass, germanate glass, alumi nate glass, and tellurate glass, since Ω 6 of phosphate glass is relatively la rge. A R is affected by the covalency of the Er 3+ ion sites and correspon ds to the Ω 6 value. 展开更多
关键词 erbium doped phosphate laser glasses spectroscopic properties network modifi ers compositional dependence
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Measurements of the Electrical Incidence Angle Modifiers of an Asymmetrical Photovoltaic/Thermal Compound Parabolic Concentrating-Collector 认领 引用 被引量：1
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作者 Bernardo Ricardo Davidsson Henrik +5 位作者 Gentile Niko Gomes Joao Gruffman Christian Chea Luis Mumba Chabu Karlsson Bjorn 《Engineering（科研）》 2013年第1期37-43,共7页
Reflector edges, sharp acceptance angles and by-pass diodes introduce large variations in the electrical performance of asymmetrical concentrating photovoltaichermal modules over a short incidence angle interval. It i... Reflector edges, sharp acceptance angles and by-pass diodes introduce large variations in the electrical performance of asymmetrical concentrating photovoltaichermal modules over a short incidence angle interval. It is therefore important to quantify these impacts precisely. The impact on the electrical performance of the optical properties of an asymmetrical photovoltaichermal CPC-collector was measured in Maputo, Mozambique. The measurements were carried out with the focus on attaining a high resolution incidence angle modifier in both the longitudinal and transversal directions, since large variations were expected over small angle intervals. A detailed analysis of the contribution of the diffuse radiation to the total output was also carried out. The solar cells have an electrical efficiency of 18% while the maximum measured electrical efficiency of the collector was 13.9 % per active glazed area and 20.9 % per active cell area, at 25 °C. Such data make it possible to quantify not only the electrical performance for different climatic and operating conditions but also to determine potential improvements to the collector design. The electrical output can be increased by a number of different measures, e.g. removing the outermost cells, turning the edge cells 90°, dividing each receiver side into three or four parts and directing the tracking, when used, along a north-south axis. 展开更多
关键词 CPC-collector PVT hybrid incidence angle modifier asymmetric collector electrical efficiency
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Effect of Different Organic Modifiers on the Tensile Properties of PVC/EVA/Montmorillonite Composites 认领 引用
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作者 ChaoYingWAN YongZHANG YinXiZHANG 《Chinese Chemical Letters》 SCIE CAS 2004年第1期77-78,共2页
Poly (vinyl chloride)/ethylene-vinyl acetate/montmorillonite (PVC/EVA/OMMT) composites were prepared by melt blending method. Two kinds of montmorillonites were organically modified by trimethyloctadecyl ammonium and ... Poly (vinyl chloride)/ethylene-vinyl acetate/montmorillonite (PVC/EVA/OMMT) composites were prepared by melt blending method. Two kinds of montmorillonites were organically modified by trimethyloctadecyl ammonium and dimethyl bis (hydrogenated tallow) ammonium, respectively. The morphology and tensile properties of the resultant composites were discussed in terms of the modifier type and OMMT content. The PVC/EVA/OMMT composites have intercalated structure, which is independent of the polarity of the modifiers, while the tensile properties show strong dependence on the modifier type. The OMMT modified by polar modifier gives higher tensile ductile and strength of PVC/EVA/OMMT composites. 展开更多
关键词 Poly (vinyl chloride) ethylene-vinyl acetate copolymer montmorillonite organic modifier.
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Regulation of TS-1 zeolite morphology by crystallization modifiers to boost the oxidative reactions 认领 引用 被引量：3
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作者 Jiani Zhang Risheng Bai +1 位作者 Shiyu Zhou Jiyang Li 《Inorganic Chemistry Frontiers》 SCIE EI CAS CSCD 2025年第5期1874-1880,共7页
TS-1 zeolite is a heterogeneous catalyst renowned for its remarkable catalytic performance in oxidation processes.Thus,tailoring its morphology is crucial for targeted reactions.Herein,we presented a facile and versat... TS-1 zeolite is a heterogeneous catalyst renowned for its remarkable catalytic performance in oxidation processes.Thus,tailoring its morphology is crucial for targeted reactions.Herein,we presented a facile and versatile method to regulate the orientation-dependent growth behavior of TS-1 zeolite by utilizing crystal growth modifiers(CGMs).Nanosheet TS-1 zeolites with a short b-axis dimension were synthesized using N,N-dimethylformamide(DMF)as a CGM,while thin-layer assemblies along the c-axis dimension with a hierarchical structure were prepared in the presence of N,N-dimethylacetamide(DMA)or N,N-dimethylpropionamide(DMP)as CGMs.The directional adsorption of different CGMs on specific crystal facets of zeolite was found to be the core reason for modulating the morphology of TS-1.Diverse TS-1 morphologies were suitable for different oxidation reactions:nanosheets enhanced selectivity in 1-hexene epoxidation,while thin-layer assemblies showed excellent activity and stability in dibenzothiophene oxidative desulfurization.This work offers further insights into customizing zeolite properties and optimizing their catalytic performance. 展开更多
关键词 heterogeneous catalyst crystallization modifiers crystal growth modifiers crystal growth modifiers cgms nanosheet oxidative reactions its morphology morphology regulation targeted reactionshereinwe
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