纤维素基导电水凝胶的合成及其结构性能表征  

Synthesis,structure and performance characterization of cellulose-based conductive hydrogel

作　　者：梁祥涛[1] 瞿冰[1] 肖惠宁 何北海[1] 钱丽颖[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广州510640 [2]Department of Chemical Engineering,University of New Brunswick,Fredericton

出　　处：《功能材料》2014年第8期8134-8138,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(31200457);国家重点基础研究发展计划(973计划)专项资金资助项目(2010CB732201)

摘　　要：以离子液体（氯化-1-丁基-三甲基咪唑,BMIMCl）溶解微晶纤维素（MCC）,以N,N-亚甲基双丙烯酰胺作为交联剂形成的纤维素水凝胶为基体,同时吡咯（Py）作为导电聚合物单体,制备了纤维素基导电水凝胶。对MCC/PPy复合导电水凝胶的化学结构和表面形貌进行了表征,研究了该导电水凝胶的导电性、溶胀性能和热稳定性。结果表明,PPy与MCC水凝胶形成了具有半互穿网络结构的导电水凝胶,该水凝胶表面呈蜂窝状;其电导率数量级可达10-4～10-3,且对甲苯磺酸钠掺杂可大幅提高其电导率;随着MCC浓度的增加,纤维素水凝胶的平衡溶胀率呈下降趋势,所得导电水凝胶的溶胀率比纯纤维素水凝胶的溶胀率略有下降,但仍能维持500%的水平;此外,该导电水凝胶的热稳定性较纯MCC水凝胶有所下降。A kind of novel MCC/PPy composite hydrogel has been prepared using the cross-linking network of microcrystalline cellulose（MCC）as the matrix of the hydrogel,which was dissolved in ionic liquid（chloride-1-butyl-3-methylimidazolium,BMIMCl）and cross-linked by N,N-methylene-bis-arcylamide,and pyrrole（Py）as the monomer of conductive polymer.The chemical structure and morphology of the MCC/PPy composite hydrogel were characterized by FT-IR and SEM,meanwhile,the conductivity,swelling ratio and thermal stability were studied.Results showed that the MCC/PPy composite hydrogel was semi-IPN conductive hydrogel with honeycomb-like structure.Conductivity of the composite hydrogel was between 10-4-10-3 S/cm,and doping of TsONa increased the conductivity significantly.The equilibrium swelling ratio（ESR）decreased with higher MCC content for both pure MCC hyrogel and the composite hydrogel;and ESR of the composite hydrogel could maintain at the level of 500% which was lower than that of the pure MCC hydrogel.Besides,the thermal stability of the composite hydrogel was reduced than the pure MCC hydrogel.

关 键 词：离子液体 微晶纤维素 聚吡咯 导电水凝胶 

分 类 号：TB324[一般工业技术—材料科学与工程]