高强度多重网络导电聚合物复合水凝胶.pdf

第5卷 第9期 692 中国科技论文在线 SCIENCEPAPER ONLINE 2010 年 9 月 高强度多重网络导电聚合物复合水凝胶 戴庭阳，陆 云 （南京大学化学化工学院高分子科学与工程系，配位化学国家重点实验室，南京 210093 ） 摘 要：将利用超分子自组装法制备的聚（3,4- 乙撑二氧噻吩）-聚苯乙烯磺酸(PEDOT-PSS)水凝胶与聚丙烯酸(PAA) 水凝胶复合，制备兼具高力学强度和电化学活性的PAA/PAA/PEDOT-PSS三重网络(TN)水凝胶。对材料的机械性质、 微观结构、分子构象等进行研究，提出TN水凝胶的增强机理。在此基础上，将自身为半互穿网络的PEDOT-PSS水凝 胶与电中性的聚丙烯酰胺(PAAm)水凝胶复合，制备具有较高机械强度的PAAm/PEDOT-PSS特殊二重网络(sDN)水凝 胶，实现了导电聚合物水凝胶增强过程的简化。系统研究sDN水凝胶中各组分对其机械性质、微观结构等的影响，提 出sDN水凝胶断裂过程中形成PEDOT碎片的特殊增强机理。 关键词：水凝胶；导电聚合物；多重网络；机械强度 中图分类号：O631.2 文献标志码：A 文章编号：1673－7180(2010)09 －0692 －7 High-strength multi-network conducting polymer composite hydrogels Dai Tingyang ，Lu Yun (Department of Polymer Science and Engineering, State Key Laboratory of Coordination chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China) Abstract: Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT-PSS) hydrogels, which are synthesized via the supramolecular self-assembly method, are combined with poly(acrylic acid) (PAA) hydrogel to construct PAA/PAA/PEDOT-PSS triple-network (TN) hydrogels with enhanced mechanical strength and electrical activity. The mechanical properties, microstrucrures and molecular conformations are investigated, and a strengthening mechanism is proposed. As a development of the above study, PEDOT-PSS hydrogels, which are semi-IPN hydrogels themselves, are combined with neutral poly(acrylamide) (PAAm) hydrogel to build PAAm/PEDOT-PSS special double-network (sDN) hydrogels. Such a work realizes the simplif