PU弹性网络对PAM凝胶吸水/脱水行为的影响  

Effects of elastic polyurethane network on swelling/deswelling behaviors of polyacrylamide hydrogels

作　　者：曾尤[1] 王瑞春[2] 谷亚新[1] 刘运学[1] 赵金波[1] 

机构地区：[1]沈阳建筑大学材料科学与工程学院,辽宁沈阳110168 [2]中国科学院金属研究所,辽宁沈阳110016

出　　处：《沈阳建筑工程学院学报（自然科学版）》2004年第3期192-195,共4页Journal of Shenyang Architectural and Civil Engineering University(Nature Science)

基　　金：国家自然科学基金资助项目(59931020)

摘　　要：为改善聚丙烯酰胺凝胶(PAM)在吸水/脱水过程中对环境变化的响应性,制备了多孔聚氨酯弹性体(PU)与PAM的互穿网络结构(IPN),测试其在吸水/脱水过程中的质量和体积变化,并与PAM凝胶的响应行为进行比较,研究PU网络的回弹作用对PAM凝胶吸水/脱水行为的影响.分析表明,吸水过程中PU网络的作用主要表现为后期对溶胀网络的束缚;而在脱水过程中,其回弹行为对溶胀PAM凝胶的初期体积收缩具有明显的加速作用.这种PU/PAMIPN结构可以提高PAM作为传感/驱动器件的环境响应性.Interpenetrating polymer network (IPN) hydrogels composed of polyacrylamide(PAM) and polyurethane (PU) were synthesized in order to improve the responsive rate of PAM hydrogels.The changes of mass and volume of PU/PAM IPN hydrogels were measured in the process of absorbing-water/air-drying.By comparing the swelling/deswelling behaviors between PU/PAM IPN and PAM hydrogels,the effects of elastic PU network on responsive rate of PAM hydrogels were investigated.In the absorbing-water process,the PU network hindered the further expansion of swollen network rather than increase the swelling rate of PAM hydrogel obviously;whereas,in the initial stage of air-drying process the elastic network of PU could accelerate the deswelling process on a large scale due to the elastic recovery of PU network extended.Owing to the rapid response to the change of water content,the PU/PAM IPN hydrogels have large potentialities to be utilized as sensor and actuator in smart material systems.

关 键 词：聚氨酯 聚丙烯酰胺 互穿网络 凝胶 吸水/脱水行为 

分 类 号：O633.14[理学—高分子化学]