纤维素基导电凝胶的制备及其在电致变色器件中的应用

Preparation of Cellulose Conductive Gel and Its Application in Electrochromic Devices

利用纤维素开发导电凝胶已经成为当前研究的热点。本研究采用聚乙烯醇(PVA)和聚丙烯酰胺(PAM)作为聚合物体系,使用1-烯丙基-3-甲基咪唑氯盐([Amim]Cl)和二甲基亚砜(DMSO)溶解玉米芯纤维素,以环氧氯丙烷(ECH)为交联剂,制备了纤维素基水凝胶(CL/PVA-PAM-based hydrogel)。此外,测试了纤维素凝胶的晶体结构、形貌特征、力学性能以及凝胶聚合物电解质的离子电导率。发现制备的纤维素基凝胶的晶体结构没有被改变,凝胶的孔隙变小,拉伸强度达到了160 kPa且最大电导率可达到3.17 S/m。经组装后的固态电致变色器件拥有颜色变化响应性和良好的循环稳定性,在制备绿色环保的电致变色器件中显示出较大的应用潜力。

The conductive gel using cellulose had become the focus of current research.In this study,polyvinyl alcohol(PVA)and polyacrylamide(PAM)were used as polymer systems,corn cob cellulose was dissolved by 1-allyl-3-methylimidazole chloride([Amim]Cl)and dimethyl sulfoxide(DMSO),and epichlorohydrin was used as a crosslinking agent to prepare cellulose-based hydrogel(CL/PVA-PAM-based hydrogel).In addition,the crystal structure,morphological characteristics,mechanical properties,and ionic conductivity of gel polymer electrolytes were tested.It is found that the crystal structure of prepared cellulose conductive gel is not changed,the pores of the gel becomes smaller,the tensile strength could achieve 160 kPa,and the maximum conductivity could reach 3.17 S/m.Finally,an electrochromic all-solid-state device is assembled,which shows good optical modulation ability and cycle stability.These materials exhibit excellent application potential in the preparation of green electrochromic devices.