THERMOSENSITIVE SUPERABSORBENTS BASED ON POLY(N,N-DIETHYLACRYL AMIDE-co-SODIUM ACRYLATE)

作     者：D.G.Lessard 朱晓夏 

作者机构：Departement de ChimieUniversite de MontrealC.P.6128 Succursale Centre-villeMontrealQCH3C 3J7Canada 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2012年第30卷第6期

页      面：873-878页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by AbsorbPlus Textiles Inc. NSERC of Canada and Canada Research Chair Program 

主　　题：Thermosentive polymers Superabsorbents Hydrogels Swelling Poly(N,N-diethylacrylamide-co-sodiumacrylate). 

摘      要：A series of poly（N,N-diethylacrylamide-co-sodium acrylate） with a degree of crosslinking of 1 mol% have been prepared as therrnosensitive superabsorbents for water. The critical swelling temperatures or the volume phase transition temperature （VPTT） and the water absorption capacity of the polymers can be modulated by varying the amount of sodium acrylate （0-60 tool%） in the copolymers. The water absorption and swelling properties of the different hydrogels have been studied as function of temperature. The crosslinked copolymers can absorb large amounts of water at ambient temperatures and dehydrate at higher temperatures with relative ease, making the absorbent materials thermally responsive and thus reusable. The water absorption capacity of the copolymers depends on the pH of the media as the acrylate monomer has a higher water absorption in its deprotonated state. Added urea in the media raises and sharpens the VPTT values of the copolymers containing sodium acrylate.