低临界溶液温度
自愈水凝胶
色谱中的热响应聚合物
材料科学
智能聚合物
聚合物
智能材料
丙烯酸酯
化学工程
水溶液中的金属离子
高分子化学
纳米技术
金属
化学
有机化学
共聚物
复合材料
冶金
高效液相色谱法
反相色谱法
工程类
作者
Zhou Jia-hua,Dongjian Shi,Tatsuo Kaneko,Weifu Dong,Mingqing Chen
标识
DOI:10.1002/marc.202300488
摘要
Abstract Low critical solution temperature (LCST) of commonly used thermoresponsive polymers in water is basically dominated by hydrophobic interactions. Herein, a novel thermoresponsive system based on electrostatic interactions is reported. By simply loading aluminum chloride (AlCl 3 ) into non‐responsive poly(2‐hydroxyethyl acrylate) (PHEA) hydrogels, PHEA‐Al gels turn to have reversible thermoresponsive behavior between transparent and opaque without any volume change. Further investigations by changing metal ion‐polymer compositions unravel the necessity of specific electrostatic interactions, namely, cation‐dipole bonding interactions between hydroxy groups and trivalent metal ions. The thermoresponsive hydrogel demonstrates high transparency (≈95%), excellent luminous modulation capability (>98%), and cyclic reliability, suggesting great potential as an energy‐saving material. Although LCST control by salt addition is widely known, salt‐induced expression of thermoresponsiveness has barely been discussed before. This design provides a new approach of easy fabrication, low cost, and scalability to develop stimuli‐responsive materials.
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