Abstract:

N,N,N-trimethyl chitosan quaternary ammonium hydrogel（TMCG）was prepared in the mild condition by using reactive divinyl sulfone（DVS）as a cross-linking agent. The swelling behavior and mechanical properties of TMCG were investigated，together with the water state and distribution in swelling TMCG. The results show that TMCG is an ionic responsive hydrogel with fast swelling rate and high swelling ratio，the maximum equilibrium swelling ratio approaches to 40 times. TMCG has significant ionic responsiveness. Water molecules exist in the TMCG by three different forms of state as free water，freezing bound water，non-freezing bound water，and non-freezing bound water content increases with the increase of cross-linking agent. TMCG has good mechanical properties，the maximum tensile strength is up to 13.82 MPa，and the highest elongation at break is up to 135.3%.

摘要：

采用反应活性强和交联条件温和的二乙烯基砜为交联剂，制备了N,N,N-三甲基壳聚糖季铵盐水凝胶（TMCG）并研究了TMCG的溶胀行为、水的状态和分布以及力学性能等。结果表明，TMCG在水中溶胀迅速，平衡溶胀度达40倍，并且具有离子响应性；水分子在TMCG中以自由水、可冻结的结合水和非冻结的结合水三种形式存在，其非冻结的结合水含量随交联剂浓度的增加而增大。TMCG具有良好的力学性能，拉伸强度达13.8 MPa，断裂伸长率达135.3%。