以具有pH敏感性的聚衣康酸网络为基础,利用分步互穿聚合物网络(IPN)技术引入了另一具有温度敏感性的聚N-异丙基丙烯酰胺网络,制得了一种新的全IPN型水凝胶,对其溶胀性能进行研究,发现其在25~45℃的温度区域表现出明显的收缩特性,且随着pH增加,凝胶的溶胀率变大。这表明聚衣康酸/聚N-异丙基丙烯酰胺互穿网络水凝胶具有温度及pH双重敏感特性。

Synthesis and Characterization of Polyitaconic Acid/ Poly N-isopropyl Acrylamide Interpenetrating Polymer Network HydrogelWU Li-li(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China)Polyitaconic acid/ Poly N-isopropyl acrylamide interpenetrating polymer network hydrogel was synthesized.From study of swelling ratios of the hydrogel in different conditions,it was found that the hydrogel displayed obvious contraction characteristic in 25～45 ℃ temperature ranges and its swelling ratio increased as the pH rise.The hydrogel had temperature and pH-sensitive character.polyitaconic acid;poly N-isopropyl acrylamide;IPN hydrogel;environmental sensitive