文章摘要
高强度温敏性聚N-异丙基丙烯酰胺/SiO2纳米复合水凝胶的制备表征及形状记忆行为
Synthesis and Characterization of High Strength and Temperature-Sensitive PINPA/SiO2 Nanocomposite Hydrogels with Shape Memory Behavior
  
DOI:10.16865/j.cnki.1000-7555.2018.06.024
中文关键词: 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
英文关键词: nanocomposite hydrogel  high strength  temperature-sensitive  poly (N-isopropylacrylamide)  shape memory
基金项目: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)
作者单位
许 波1, 李 配1, 李欢军2, 王兰兰1 1. 江南大学 生态纺织教育部重点实验室江苏 无锡 214122
2. 北京理工大学 化学与化工学院北京 102488 
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中文摘要:
      使用3-(甲基丙烯酰氧)丙基三甲氧基硅烷(MPS)对SiO2纳米粒子(SNPs)进行表面改性,获得带有双键的功能化SiO2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/SiO2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SiO2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 kPa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 SiO2 nanoparticles (SNPs) in order to obtain the vinyl-contained functionalized SNPs (F-SNPs). High strength poly (N-isopropylacrylamide) (PNIPA)/SiO2 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 kPa 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.
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