基于丙烯酰氧乙基三甲基氯化铵导电水凝胶的制备及性能检测

目的：筛选出机械性能优良并且导电性优异的水凝胶的最优配方。方法：以丙烯酰氧乙基三甲基氯化铵（DAC）为主要基质，以N，N-亚甲基双丙烯酰胺（BisAAm）为化学交联剂，以1-羟环己基苯酮为催化剂，同时加入甘油和羟乙基纤维素（HEC）制备出复合导电水凝胶，并测量其导电性、黏性、拉伸性能和压缩性能。结果：以DAC为基质，通过BisAAm、甘油以及HEC进行配比添加后，该凝胶与3M导电水凝胶相比无异味和残留，长期稳定性好不变色，也无细菌滋生。通过适当配比添加甘油及HEC后，其导电性、黏性、拉伸性能和压缩性能均优于传统的3M导电水凝胶（P＜0.05）。通过老鼠皮肤接触实验发现，该水凝胶具有良好的生物安全性。结论：DAC的含量为60%，BisAAm的含量为5%，甘油含量为10%，HEC含量为0.015%为水凝胶最优组合。

Preparation of acryloyloxyethyl trimethyl ammonium chloride conductive hydrogel and its performance detection

Objective: To screen out the optimal formulation of hydrogels with excellent mechanical properties and electrical conductivity. Methods: A composite conductive hydrogel was prepared by using acryloyloxyethyl trimethyl ammonium chloride (DAC) as the main matrix, N, N-methylenebisacrylamide (BisAAm) as the chemical cross-linking agent, and 1-hydroxycyclohexyl benzophenone as the catalyst, added with glycerol and hydroxyethyl cellulose (HEC). Its conductivity, viscosity, tensile properties and compression properties were measured. Results: After using DAC as the matrix and adding BisAAm, glycerin, and HEC in proportion, the gel had no odor or residue compared with 3M conductive hydrogel, with good long-term stability, without color change and bacterial growth. At the same time, after adding glycerin and HEC by proper proportions, its conductivity, viscosity, tensile properties and compression properties were better than traditional 3M conductive gels. It was found through mouse skin contact experiments that the hydrogels had good biological safety. Conclusion: The hydrogel DAC content is at its best when its content is 60% and the proportion of BisAAm, glycerol and HEC is 5%, 10% and 0.015% respectively.