Synthesis of Amphiphilic Polymer Brushes with Mixed Side Chains and Their Emulsifying Function
文献类型：期刊论文
| 作者 | Yan, Ye-chao2; Huang, Hua-hua1; Zhu, Wen2; Liu, Li-xin1; Zhang, Ke2; Chen, Yong-ming1 |
| 刊名 | ACTA POLYMERICA SINICA
 |
| 出版日期 | 2017-09-20 |
| 期号 | 9页码:1531-1537 |
| 关键词 | Polymer Brush Grafting-onto Click Chemistry Emulsifying Function |
| 英文摘要 | series of amphiphilic polymer brushes with a high grafting density as a new polymeric surfactant are developed. A great deal of research on amphiphilic block polymers has been reported to apply as the surfactants, but the research on polymer brush is still scarce. Nevertheless, amphiphilic polymer brushes would be good surfactants due to their rich surface properties and various morphologies. Therefor, a series of polymer brushes with mixed hydrophilic and hydrophobic side chains were designed and synthesized via a grafting-onto approach. Firstly, a polymeric backbone of poly(glycidyl methacrylate) (PGMA) with pendent azide groups was prepared by reversible addition-fragmentation chain transfer (RAFT) mediated radical polymerization followed by post-modification. Two PGMA polymers with degrees of polymerization (DP) of 100 and 390 were obtained by tuning the ratio of the monomer to initiate. Then, an alkynyl-terminated polystyrene (PS, DP = 44) as a hydrophobic side chain was prepared via RAFT polymerization using an alkynyl-containing chain transfer agent, and an alkynyl-terminated poly(ethylene oxide) (PEO, DP = 113) as a hydrophilic side chain was obtained by a nucleophilic substitution reaction of PEO with propargyl bromide. Finally, the two types of side chains were simultaneously coupled onto the PGMA backbone by a copper-catalyzed azide-alkyne cycloaddition (CuAAC) reaction, to yield the PGMA-g-(PS44-gamma-PEO113) polymer brush. The results from size exclusion chromatography (SEC) indicated that the grafting ratios of both PS44 and PEO113 were above 90%, with a molar feeding ratio of azide to alkynyl group at 1: 1 at 50 degrees C in dimethyl formamide. A series of polymer brushes with different compositions were obtained by tuning the DP of the backbone and the feeding ratio of the two side chains. All samples have narrow molecular weight distributions (M-w/M-n < 1.20). The emulsifying ability of these amphiphilic polymer brushes in a toluene/water system was characterized. To stabilize toluene/water emulsion, the required amount of PGMA(100)-g-(PS44-gamma-PEO113) decreased with an increase in the content of PS44 side chain. A stable emulsion can be formed using PGMA(100)-g-[(PS44)(70)-gamma-(PEO113)(30)] at a concentration of as low as 0.002 wt% versus the weight of toluene. In addition, the polymer brush with a long backbone of PGMA(390) was not beneficial to emulsion stability. In comparison with the other polymer brushes, the polymer brush with a short backbone of PGMA(100) and a molar ratio of the side chains PS44: PEO113 of 70: 30 was found to exhibit the most efficient emulsifying ability. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/39105]  |
| 专题 | 化学研究所_高分子物理与化学实验室 |
| 作者单位 | 1.Sun Yat Sen Univ, Sch Mat Sci & Engn, Key Lab Polymer Composite & Funct Mat, Minist Educ, Guangzhou 510275, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Ye-chao,Huang, Hua-hua,Zhu, Wen,et al. Synthesis of Amphiphilic Polymer Brushes with Mixed Side Chains and Their Emulsifying Function[J]. ACTA POLYMERICA SINICA,2017(9):1531-1537. |
| APA | Yan, Ye-chao,Huang, Hua-hua,Zhu, Wen,Liu, Li-xin,Zhang, Ke,&Chen, Yong-ming.(2017).Synthesis of Amphiphilic Polymer Brushes with Mixed Side Chains and Their Emulsifying Function.ACTA POLYMERICA SINICA(9),1531-1537. |
| MLA | Yan, Ye-chao,et al."Synthesis of Amphiphilic Polymer Brushes with Mixed Side Chains and Their Emulsifying Function".ACTA POLYMERICA SINICA .9(2017):1531-1537. |
入库方式： OAI收割
来源：化学研究所
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