以聚乙烯醇和接枝γ-氨丙基三乙氧基硅烷（KH-550）的聚琥珀酰亚胺（KPSI）为原料，在水体系中利用一步互穿法合成了改性聚天冬氨酸/聚乙烯醇互穿网络（KPAsp/PVA IPN）吸水性树脂，并对其pH敏感性、温度敏感性进行了研究。结果表明，该新型可生物降解吸水性树脂对温度较为敏感，40℃时吸水倍率最高。在pH为2~12之间有pH敏感性，且在pH为4和9时达到峰值。采用红外光谱（FI-TR）、扫描电镜（SEM）对吸水性树脂的结构及表面形态进行表征，并用热重分析仪（TGA）测定其热稳定性。

A modified polyaspartic acid/polyvinyl alcohol interpenetrating network (KPAsp/PVA IPN) absorbent resin is synthesized by one-step interpenetrating method in aqueous system using polysuccinimide grafted 3-aminpropyltriethoxysilane (KH-550) and polyvinyl alcohol as raw materials.The sensitivities of KPAsp/PVA IPN absorbent resin on pH and temperature are investigated.The results show this resin has good sensitive to temperature and exhibits the highest water absorbency at 40℃.The resin demonstrates pH sensitivity in a pH range of 2-12 and the swelling ratio achieves a maximum value when pH is 4 and 9,respectively.The resin's thermal stability is analyzed by TGA and its structure and surface morphology are characterized by SEM and FT-IR.

卢静琼(1975-),女,博士,讲师,主要从事高吸水性树脂相关理论、制备、性能及应用方面的研究,jqlu1975@163.com