摘要
通过可逆加成-断裂转移自由基聚合(RAFT)制备了一系列共聚物(PDAAM-co-PNIPAM-co-Mu),其成分为含脲基嘧啶酮(UPy)基团单体(Mu)、双丙酮丙烯酰胺(DAAM)和N-异丙基丙烯酰胺(NIPAM),利用己二酸二酰肼(ADH)和PDAAM-co-PNIPAM-co-Mu反应,得到酰腙动态共价键交联的智能水凝胶。通过扫描电镜(SEM)、流变仪和万能试验机对智能水凝胶的结构、力学性能以及智能特性进行了考察。实验结果表明:UPy基团引入到该水凝胶网络中能够通过氢键增强水凝胶,其压缩强度提高了近4倍;同时,该水凝胶具有pH和温度双重响应、自愈合性能,并且水凝胶的压缩强度在温度响应之后提高了近30倍。
A series of PDAAM-co-PNIPAM-co-Mu copolymers were synthesized by RAFT polymerization from diacetone acrylamide(DAAM),N-isopropylacrylamide(NIPAM)and ureidopyrimidinone-containing monomer(Mu).Smart hydrogels crosslinked with acylhydrazone dynamic covalent bonds were obtained by the reaction between PDAAM-co-PNIPAM-co-Mu and adipic dihydrazide(ADH).The structure,mechanical properties and intelligent properties of intelligent hydrogel were investigated by scanning electron microscope(SEM),rheometer and universal testing machine.Due to the introduction of ureidopyrimidinone(UPy)hydrogen-bonding units into the network,the mechanical properties of the hydrogels were reinforced,and the compression strength of the hydrogel was increased by 4 times.Meanwhile,the hydrogels exhibited pH and temperature dual-responsive and self-healing properties,and the compression strength was increased by 30 times after heating.
作者
刘通
马伟
熊乐艳
郭赞如
章家立
Liu Tong;Ma Wei;Xiong Leyan;Guo Zanru;Zhang Jiali(School of Materials Science and Engineering,East China Jiaotong University,Nanchang 330013,China;College of Chemistry,Chemical Engineering and Environment,Minnan Normal University,Zhangzhou 363000,China)
出处
《华东交通大学学报》
2023年第2期87-94,共8页
Journal of East China Jiaotong University
基金
国家自然科学基金项目(21802041,21865009)
江西省杰出青年基金项目(20202ACBL214001)。
