A novel temperature-/pH sensitive nanocomposite microgel cross-linked by Lithium magnesium silicate hydrate
By adopting Lithium magnesium silicate hydrate (LMSH) as physical cross-linker, a novel temperature-and pH-sensitive nanocomposite microgel based on monomer N-isopropylacrylamide (NIPAM) and acrylic acid (AAc) were prepared by surfactant-free emulsion polymerization at 70℃. The chemical structure of resulting poly(NIPAM-LMSH-AAc) microgel was confirmed by FTIR, 1H NMR and XRD. The size of microgel particle was observed by SEM. The temperature-sensitivity was investigated by turbidimeter and DSC. The results show that PNLA microgel was successful prepared under LMSH severing as physical cross-linker. The microgel dispersion presents sky blue at room temperature, while exhibits ivory white at a temperature above 33℃. Under SEM observation, the microgel particles present orbicular shape with 430nm in diameter. In addition, the introduction of AAc hasn’t clearly weaken the temperature-sensitivity of microgel dispersion.
CHEN Kun GUO Dong ZHANG Qingsong ZHAO Yiping CHEN Li
Tianjin Key Laboratory of Fiber Modification and Functional Fiber, School of Materials Science an Solideal Rubber Products (Qingdao) Co.,Ltd, Qingdao., 266000, P.R.China
国际会议
2009 International Conference on Advanced Fibers and Polymer Materials(2009年先进纤维与聚合物材料国际学术会议)
上海
英文
1226-1228
2009-10-21（万方平台首次上网日期，不代表论文的发表时间）