聚合物接枝胍基取代基构筑荷正电荷导电膜

Polymer grafted guanidine substituents to construct positive charge conducting films

本研究以自制双胍化壳聚糖(CGH)为原料,通过加入胍的乙醇溶液,引入具备交联功能的戊二醛(GA)。通过改变加入胍基的用量对原料进行交联改性来制备出电导率较高的阴离子交换膜,并对膜的电导率,含水率,溶胀度,离子交换量和机械性能等性能进行测试,考察胍含量对膜性能的影响。同时,利用红外对膜进行结构表征。结果表明,膜中胍含量的增加对于提高膜电导率、离子交换量(IEC)和含水率具有明显作用。

In this study, glutaraldehyde （GA） with cross-linking function was introduced into the ethanol so- lution of guanidine by using hexaguanidine chitosan （CGH） as raw material. The electrochemical conductivity, wa- ter content, swelling degree, ion exchange capacity and mechanical properties of the films were tested by changing the amount of guanidine added to the raw materials. The effect of guanidine content on membrane properties was investigated. At the same time, the structure of the membrane was characterized by infrared. The results show that the increase of guanidine content in the membrane has obvious effect on improving the membrane conductivity, ion exchange capacity （IEC） and water content.