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采用半互穿网络技术制备得到不同丝胶(SS)含量的丝胶基聚(N-异丙基丙烯酰胺)水凝胶。采用XRD、SEM、DSC和TGA-DTG分别考察了水凝胶的结构、相容性和热稳定性,以及凝胶的内部孔洞形态和体积相转变行为。结果表明:丝胶多肽链和凝胶分子链存在微弱的氢键作用力;随着丝胶质量分数由0增加至20%,凝胶的内部孔径增加1～2倍,且均呈结构完好的蜂窝状结构;丝胶分子链均匀地分散在凝胶基体中,无相分离发生;丝胶分子链引入使聚(N-异丙基丙烯酰胺)水凝胶的体积相转变温度增加0.2～0.3℃;最大热分解温度和DTG分解峰温度呈缓慢增加趋势。
Silk-based poly (N-isopropylacrylamide) hydrogels with different sericin (SS) content were prepared by semi-interpenetrating network technology. The structure, compatibility and thermal stability of the hydrogels were investigated by XRD, SEM, DSC and TGA-DTG, respectively. The internal pore morphology and phase transition behavior of the hydrogels were also investigated. The results showed that there was a weak hydrogen bonding force between the sericin polypeptide chain and the gel molecular chain. With the increase of the sericin mass fraction from 0 to 20%, the internal pore diameter of the gel increased 1 ~ 2 times Honeycomb structure; the sericin molecular chain is evenly dispersed in the gel matrix, no phase separation occurs; the introduction of the sericin molecular chain increases the volume phase transition temperature of the poly (N-isopropylacrylamide) hydrogel by 0.2~0.3 ℃; the maximum thermal decomposition temperature and DTG decomposition peak temperature showed a slowly increasing trend.