Miao Lei, Tu Yuanyuan, Yang Yang, Lin Shudong, Hu Jiwen, Zhang Min, Li Yue, Li Fei, Mo Yangmiao
Foshan University, Jiangwan 1st Road 18, 528000, Foshan, P. R. China.
Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Xingke Road 368, 510675, Guangzhou, P. R. China.
Chemistry. 2017 Jun 7;23(32):7737-7747. doi: 10.1002/chem.201605263. Epub 2017 May 19.
A stimuli-responsive membrane exhibiting independent pH- and temperature-responsive behavior was fabricated from a blend of commercial polysulfone with a functional amphiphilic binary graft copolymer, namely, polysulfone-graft-(poly(isopropylacrylamide-co-acrylic acid)-random-poly(methyl acrylate)), denoted PSf-g-(P(NIPAAm-co-AA)-r-PMMA). Two graft copolymers with different lengths of P(NIPAAm-co-AA) side chains were designed and enriched on the membrane surface to serve as thermo- and pH-responsive on/off switches. The differences between the dual-responsive behaviors of the two kinds of polymer-blend membranes were studied by water-flux and contact-angle measurements. The PMMA side chains served to securely anchor the graft copolymers to the membrane substrate, and the blended membrane prepared from binary graft copolymer was more stable and exhibited more robust stimuli-responsive behavior than that prepared from mono-graft copolymer PSf-g-P(NIPAAm-co-AA).
通过将市售聚砜与功能性两亲二元接枝共聚物（即聚砜-接枝-(聚(异丙基丙烯酰胺-共-丙烯酸)-无规-聚(丙烯酸甲酯))，记为PSf-g-(P(NIPAAm-co-AA)-r-PMMA)）共混，制备了一种具有独立pH和温度响应行为的刺激响应膜。设计了两种具有不同长度P(NIPAAm-co-AA)侧链的接枝共聚物，并使其富集在膜表面，用作热响应和pH响应的开/关开关。通过水通量和接触角测量研究了两种聚合物共混膜的双响应行为之间的差异。PMMA侧链用于将接枝共聚物牢固地锚定在膜基材上，由二元接枝共聚物制备的共混膜比由单接枝共聚物PSf-g-P(NIPAAm-co-AA)制备的共混膜更稳定，并且表现出更强健的刺激响应行为。
