Bookhold Johannes, Dirksen Maxim, Wiehemeier Lars, Knust Sebastian, Anselmetti Dario, Paneff Florian, Zhang Xianghui, Gölzhäuser Armin, Kottke Tilman, Hellweg Thomas
University Bielefeld, Department of Chemistry, Physical and Biophysical Chemistry, Universitätsstr. 25, 33615 Bielefeld, Germany.
University Bielefeld, Department of Physics, Experimental Biophysics, Universitätsstr. 25, 33615 Bielefeld, Germany.
Soft Matter. 2021 Mar 4;17(8):2205-2214. doi: 10.1039/d0sm02041a.
Poly(N-isopropylacrylamide) (pNIPAM) based copolymer microgels were used to create free-standing, transferable, thermoresponsive membranes. The microgels were synthesized by copolymerization of NIPAM with N-benzylhydrylacrylamide (NBHAM). Monolayers of these colloidal gels were subsequently cross-linked using an electron gun leading to the formation of a connected monolayer. Furthermore, the cross-linked microgel layer is detached from the supporting material by dissolving the substrate. These unique systems can be used as transferable, thermoresponsive coatings and as thermoresponsive membranes. As a proof of principle for the use of such membranes we studied the ion transport through them at different temperatures revealing drastic changes when the lower critical solution temperature of the copolymer microgels is reached.
基于聚（N-异丙基丙烯酰胺）（pNIPAM）的共聚物微凝胶被用于制备独立、可转移的热响应膜。微凝胶通过NIPAM与N-苄基丙烯酰胺（NBHAM）共聚合成。随后，使用电子枪对这些胶体凝胶的单层进行交联，从而形成连接的单层。此外，通过溶解底物，将交联的微凝胶层从支撑材料上分离下来。这些独特的体系可用作可转移的热响应涂层和热响应膜。作为使用此类膜的原理证明，我们研究了不同温度下离子通过它们的传输情况，结果表明当达到共聚物微凝胶的低临界溶液温度时会发生剧烈变化。
