温度及pH敏感共聚/粘土纳米复合水凝胶的合成与性能研究  

The synthesis and characterization of doubling sensitive poly(N-isopropylacrylamide-co-2-hydroxyethyl methacrylate)/clay nanocomposite hydrogels

作　　者：肖顺立[1] 马敬红[1] 梁伯润[1] 

机构地区：[1]东华大学材料科学与工程学院,上海201620

出　　处：《合成技术及应用》2008年第1期7-10,共4页Synthetic Technology & Application

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%.

关 键 词：纳米复合水凝胶 双重敏感性 N-异丙基丙烯酰胺 甲基丙烯酸-β-羟乙醇 粘土 

分 类 号：TB383.1[一般工业技术—材料科学与工程]