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Tunable Pickering Emulsions with Environmentally Responsive Hairy Silica Nanoparticles
Liu, Min1; Chen, Xiaoli2; Yang, Zongpeng1; Xu, Zhou1; Hong, Liangzhi1; Ngai, To3
2016-11-30
发表期刊ACS APPLIED MATERIALS & INTERFACES
卷号8期号:47页码:32250-32258
摘要Surface modification of the nanoparticles using surface anchoring of amphiphilic polymers offers considerable scope for the design of a wide range of brush-coated hybrid nanopartides with tunable surface wettability that may serve as new class of efficient Pickering emulsifiers. In the present study, we prepared mixed polymer brush-coated nanoparticles by grafting ABC miktoarm star terpolymers consisting of poly(ethylene glycol), polystyrene, and poly[(3-triisopropyloxysilyl)propyl methacrylate] (mu-PEG-b-PS-b-PIPSMA) on the surface of silica nanoparticles. The wettability of the as prepared nanoparticles can be precisely tuned by a change of solvent or host guest complexation. H-1 NMR result confirmed that such wettability change is due to the reorganization of the polymer chain at the grafted layer. We show that this behavior can be used for stabilization and switching between water-in oil (W/O) and oil-in-water (O/W) emulsions. For hairy particles initially dispersed in oil, W/O emulsions were always obtained with collapsed PEG chains and mobile PS chains at the grafted layer. However, initially dispersing the hairy particles in water resulted in O/W emulsions with collapsed PS chains and mobile PEG chains. When a good solvent for both PS and PEG blocks such as toluene was used, W/O emulsions were always obtained no matter where the hairy particles were dispersed. The wettability of the mixed polymer brush-coated silica particles can also be tuned by host guest complexation between PEG block and alpha-CD. More importantly, our result showed that surprisingly the resultant mixed brush-coated hairy nanoparticles can be employed for the one-step production of O/W/O multiple emulsions that are not attainable from conventional Pickering emulsifiers. The functionalized hairy silica nanoparticles at the oil water interface can be further linked together utilizing poly(acrylic acid) as the reversible linker to form supramolecular colloidosomes, which show pH-dependent release of cargo.
文章类型Article
关键词Pickering Emulsions Hairy Particles Wettability Multiple Emulsions
WOS标题词Science & Technology ; Technology
资助者National Natural Science Foundation of China(21104020 ; Fundamental Research Funds for the Central Universities ; 21374031 ; 21234003) ; National Natural Science Foundation of China(21104020 ; Fundamental Research Funds for the Central Universities ; 21374031 ; 21234003)
DOI10.1021/acsami.6b11931
研究领域[WOS]Science & Technology - Other Topics ; Materials Science
关键词[WOS]IN-WATER EMULSIONS ; PARTICLE-STABILIZED EMULSIONS ; INTERNAL-PHASE EMULSIONS ; SURFACE-ACTIVE POWDER ; POLYMER-BRUSH ; POLY(ETHYLENE OXIDE) ; COLLOIDAL PARTICLES ; GOLD NANOPARTICLES ; POLY(ACRYLIC ACID) ; MICROGEL PARTICLES
收录类别SCI
语种英语
资助者National Natural Science Foundation of China(21104020 ; Fundamental Research Funds for the Central Universities ; 21374031 ; 21234003) ; National Natural Science Foundation of China(21104020 ; Fundamental Research Funds for the Central Universities ; 21374031 ; 21234003)
WOS类目Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号WOS:000389161600018
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/14008
专题中国科学院广州能源研究所
作者单位1.South China Univ Technol, Dept Polymer Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
3.Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China
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Liu, Min,Chen, Xiaoli,Yang, Zongpeng,et al. Tunable Pickering Emulsions with Environmentally Responsive Hairy Silica Nanoparticles[J]. ACS APPLIED MATERIALS & INTERFACES,2016,8(47):32250-32258.
APA Liu, Min,Chen, Xiaoli,Yang, Zongpeng,Xu, Zhou,Hong, Liangzhi,&Ngai, To.(2016).Tunable Pickering Emulsions with Environmentally Responsive Hairy Silica Nanoparticles.ACS APPLIED MATERIALS & INTERFACES,8(47),32250-32258.
MLA Liu, Min,et al."Tunable Pickering Emulsions with Environmentally Responsive Hairy Silica Nanoparticles".ACS APPLIED MATERIALS & INTERFACES 8.47(2016):32250-32258.
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