基于纤维素离子液体溶液制备纤维素水凝胶和干凝胶

Preparation of cellulose hydrogel and xerogel from its ionic liquid solution

以功能化离子液体氯化1-(2-羟乙基)-3-甲基咪唑盐([HOC2MIM]Cl)溶解微晶纤维素,常温下可再生得到纤维素水凝胶和干凝胶。利用傅立叶变换红外光谱(FTIR)、X射线衍射(XRD)、热重分析仪(TG)和扫描电子显微镜(SEM)等对纤维素水凝胶或干凝胶进行了表征。结果显示,纤维素水凝胶和干凝胶有好的透明度和一定的力学性能,纤维素分布均匀。并探讨了水凝胶和干凝胶的形成机制。

Cellulose hydrogel and xerogel were prepared by regenerating cellulose from its ionic liquid 1-（2-hydroxylethyl）-3-methyl imidazolium chloride（ [ HOC2MIM ] C1）solution at room temperature and characterized by Fourier transform infrared spectroscopy, X-ray diffraction, thermal gravimetric analysis and Scanning Electron Microscopy. The results show that the as-prepared cellulose hy drogel and xerogel present a good transparency and an acceptable mechanical property. In addition, the possible formation mecha nism of cellulose hydrogel and xerogel was also discussed.