Tunable Pickering Emulsions with Environmentally Responsive Hairy Silica Nanoparticles
文献类型：期刊论文
| 作者 | Liu, Min1; Chen, Xiaoli2; Yang, Zongpeng1; Xu, Zhou1; Hong, Liangzhi1; Ngai, To3 |
| 刊名 | ACS APPLIED MATERIALS & INTERFACES
 |
| 出版日期 | 2016-11-30 |
| 卷号 | 8期号:47页码:32250-32258 |
| 关键词 | Pickering Emulsions Hairy Particles Wettability Multiple Emulsions |
| DOI | 10.1021/acsami.6b11931 |
| 文献子类 | Article |
| 英文摘要 | 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. |
| WOS关键词 | 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:000389161600018 |
| 资助机构 | National Natural Science Foundation of China(21104020 ; Fundamental Research Funds for the Central Universities ; 21374031 ; 21234003) |
| 源URL | [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 |
| 推荐引用方式 GB/T 7714 | 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. |
入库方式： OAI收割
来源：广州能源研究所
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