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非离子-阴离子Bola型表面活性剂和纳米SiO2颗粒协同稳定的双重响应型O/W乳状液 认领 引用 被引量：2
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作者 刘佩 潘婷 +4 位作者 裴晓梅 宋冰蕾 蒋建中 崔正刚 Bernard P.Binks 《日用化学工业（中英文）》 CAS 北大核心 2024年第1期1-15,共15页
合成了一种非离子-阴离子Bola型智能表面活性剂,通过pH-响应可以在非离子型CH3O(EO)5-R11-COOH(pHpKa)之间转换。单独使用时,非离子型和Bola型分别表现为不良乳化剂和优良乳化剂。与纳米SiO2颗粒复配使用时,非离子型能与SiO... 合成了一种非离子-阴离子Bola型智能表面活性剂,通过pH-响应可以在非离子型CH3O(EO)5-R11-COOH(pHpKa)之间转换。单独使用时,非离子型和Bola型分别表现为不良乳化剂和优良乳化剂。与纳米SiO2颗粒复配使用时,非离子型能与SiO2颗粒协同稳定O/W(正癸烷)型Pickering乳状液,其中表面活性剂通过氢键作用吸附到颗粒表面产生原位疏水化作用,提高了颗粒的表面活性,并且这种Pickering乳状液具有pH-和温度-双重响应性,能够通过改变pH或者温度使乳状液在稳定和破乳之间实现多次转换。另一方面,Bola型CH3O(EO)5-R11-COONa能够与纳米SiO2颗粒协同稳定分散液包油(oil-in-dispersion)乳状液,该乳状液具有良好的耐温性,但对调节pH时产生的盐较为敏感。然而与破乳后能完全返回水相便于回收再利用的同系物CH3O(EO)7-R11-COOH相比,具有较短EO链的CH3O(EO)5-R11-COOH无论处于非离子型还是Bola型状态仍具有相当的油溶性,破乳后不能完全返回水相,表明EO数大小对这类新型智能表面活性剂的性能有显著的影响。 展开更多
关键词 非离子-阴离子Bola型表面活性剂 纳米SiO2颗粒 Pickering乳状液 pH-响应 温度-响应
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Localizing Anaerobic Microbial Cultivation and Recovery Through Intelligent Pickering Emulsion Phase Inversion 认领 引用 被引量：1
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作者 Hang Jiang Lin Qi +8 位作者 Yunxing Li Bingtian Zhao Xin Guan Panfei Ma Wei Liu Cheng Yang Jianzhong Jiang Bernard P.Binks To Ngai 《CCS Chemistry》 CSCD 2025年第7期2137-2148,共12页
Microbial cultivation in microcompartments using water-in-oil(w/o)emulsion droplets has greatly advanced the study of strict anaerobic bacteria.However,a major challenge lies in the separation and recovery of the bact... Microbial cultivation in microcompartments using water-in-oil(w/o)emulsion droplets has greatly advanced the study of strict anaerobic bacteria.However,a major challenge lies in the separation and recovery of the bacterial liquid.In this study,we address this challenge by localizing strict anaerobes within w/o Pickering emulsion droplets stabilized by modified microgel particles.This approach demonstrates remarkable efficiency in bacterial microencapsulation,growth and separation.The microgel particles are modified in-situ with hydrophobic silica allowing for stabilization of w/o emulsions at the optimum cultivation temperature of 37℃ while the continuous oil phase prevents oxygen ingress thereby maximizing anaerobic fermentation.Additionally,a temperature decrease triggers the microgel particles to swell and become hydrophilic,causing an immediate inversion of the emulsion to oil-in-water type.This facilitates complete separation and collection of the bacterial suspension without any damage or loss.The intelligent phase inversion of the emulsion presents exciting possibilities for various applications in anaerobic fermentation,synthetic biology and biomanufacturing. 展开更多
关键词 Pickering emulsion emulsion phase inversion microgel strict anaerobes microcompartment cell factory
Bacterial microcompartment-mimicking Pickering emulsion droplets for detoxification of chemical threats under sweet conditions 认领 引用
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作者 Xiao Xu Wenqi Xie +14 位作者 Ting Wu Chen Chen Xiaoning Chen Yuheng Yang Hao Lian Hao Chen Xiaofeng Cheng Zhitong Chen Guojun Chen Chaoqun Liu Lanlan Chen Yu He Zhaowei Chen Bernard P.Binks Huanghao Yang 《Science China Chemistry》 SCIE EI CAS CSCD 2024年第9期3039-3049,共11页
Chemical warfare agents represent a severe threat to mankind and their efficient decontamination is a global necessity.However,traditional disposal strategies have limitations,including high energy consumption,use of ... Chemical warfare agents represent a severe threat to mankind and their efficient decontamination is a global necessity.However,traditional disposal strategies have limitations,including high energy consumption,use of aggressive reagents and generation of toxic byproducts.Here,inspired by the compartmentalized architecture and detoxification mechanism of bacterial microcompartments,we constructed oil-in-water Pickering emulsion droplets stabilized by hydrogen-bonded organic framework immobilized cascade enzymes for decontaminating mustard gas simulant(2-chloroethyl ethyl sulfide,CEES)under sweet conditions.Two exemplified droplet systems were developed with two-enzyme(glucose oxidase/chloroperoxidase)and threeenzyme(invertase/glucose oxidase/chloroperoxidase)cascades,both achieving over 6-fold enhancement in decontamination efficiency compared with free enzymes and>99% selectivity towards non-toxic sulfoxide.We found that the favored mass transfer of sugars and CEES from their respective phases to approach the cascade enzymes located at the droplet surface and the facilitated substrate channeling between proximally immobilized enzymes were key factors in augmenting the decontamination efficacy.More importantly,the robustness of immobilized enzymes enabled easy reproduction of both the droplet formation and detoxification performance over 10 cycles,following long-term storage and in far-field locations. 展开更多
关键词 Pickering emulsion biomimetics chemical warfare agent bacterial microcompartment biocatalysis
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