使用3-(甲基丙烯酰氧)丙基三甲氧基硅烷(MPS)对Si O2纳米粒子(SNPs)进行表面改性,获得带有双键的功能化Si O2纳米粒子(F-SNPs),然后将N-异丙基丙烯酰胺(NIPA)在F-SNPs分散液中原位自由基聚合,获得了高强度的PNIPA/Si O2纳米复合水凝胶(FS-NC gel)。力学性能测试与溶胀实验结果表明,与使用有机交联剂和未功能化的Si O2纳米粒子交联的水凝胶相比,FS-NC gel的力学性质明显提高,其拉伸强度和压缩强度最高可达205 k Pa和7.8 MPa,同时保持了PNIPA纳米复合水凝胶的快速响应性和温度敏感性。此外,水凝胶还表现出水驱动的形状记忆行为。
【英文摘要】
In this study,3-methacryloxypropyltrimethoxysilane( MPS) was used to modify the surface of Si O2 nanoparticles( SNPs) in order to obtain the vinyl-contained functionalized SNPs( F-SNPs). High strength poly( N-isopropylacrylamide)( PNIPA)/Si O2 nanocomposite hydrogel( FS-NC gel) was prepared by in situ free radical polymerization of N-isopropyl acrylamide in the aqueous dispersion of F-SNPs. The results obtained from mechanical tests and swelling measurements indicate that the FS-NC gel displays significantl...