摘要
以无机粘土为交联剂制备了具有温度、pH双重敏感性的聚(N-异丙基丙烯酰胺-co-甲基丙烯酸-β-羟乙酯)/粘土纳米复合水凝胶(P(NIPA-co-HEMA)/clay),并用红外和X衍射对其结构和形态进行了表征。在弱碱性(pH=7.4)和25℃条件下,分别研究了温度和不同pH缓冲溶液对该凝胶溶胀度的影响,测定了纳米复合水凝胶的力学性能。结果表明:水凝胶的粘土已被剥离成单片层,且均匀分散在凝胶网络中,起交联作用;P(NIPA-co-HEMA)/clay具有良好的温度、pH双重敏感特性;凝胶的断裂伸长率>1000%。
Poly （ N-isopropylacrylamide-co-2-hydroxyethyl methacrylate ） / clay hydrogel was copolymerized with NIPA and HEMA cross-linked by clay to form a new kind of nanocomposite hydrogel P（NIPA-co-HEMA）/clay was obtained. The structure was characterized using FT-IR and XRD. Mechanical properties and swelling behavior of P （NIPA-co- HEMA）/clay hydrogels at different pH and temperature were studied. In the hydrogel, clay is almost exfoliated and acted as a muhifunctional crosslinker. The hydrogel show both excellent temperature and pH sensitive properties. The elonga- tion at break of P（NIPA-co-HEMA）/clay hydrogels is more than 1 000%.
出处
《合成技术及应用》
2008年第1期7-10,共4页
Synthetic Technology & Application
