摘要
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。
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 significantly improved mechanical properties（ the tensile and compressive strength of FS-NC gels are up to 205 k Pa and 7. 8 MPa,respectively） compared to hydrogels cross-linked with organic cross-linker or unmodified SNPs,and maintains the fast response rate and temperature-sensitivity of PNIPA nanocomposite hydrogels. Furthermore,FS-NC gel also shows water-induced shape memory behavior.
作者
许波
李配
李欢军
王兰兰
Bo Xu;Pei Li;Huanjun Li;Lanlan Wang(Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China;School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2018年第6期139-144,共6页
Polymer Materials Science & Engineering
基金
中央高校基本科研业务费专项资金(JUSRP115A03)
"政府间国际科技创新合作"重点专项(2016YFE0115700)
关键词
纳米复合水凝胶
高强度
温敏性
聚N-异丙基丙烯酰胺
形状记忆
nanocomposite hydrogel
high strength
temperature-sensitive
poly （N-isopropylacrylamide）
shape memory
