基于离子液体溶解-超临界干燥技术制备纤维素基气凝胶材料的研究进展

作为自然界储量最为丰富、可持续、可再生、环境友好的一种天然原材料,纤维素已成为高分子材料领域的研究热点之一。其中纤维素气凝胶兼具超高孔隙率、超低密度纳米多孔材料的优点和高分子材料韧性好、易加工的特性,有诸多优异的性能,是继无机气凝胶和合成高分子气凝胶之后新一代气凝胶材料,正受到人们广泛的关注。介绍了作者课题组利用离子液体制备纤维素气凝胶方面的研究进展,主要包括:利用离子液体溶解结合超临界CO_2干燥技术制备纤维素气凝胶;纤维素基复合气凝胶材料的制备;以及纤维素气凝胶材料作为锂离子电池凝胶聚合物电解质的应用。

Progress on Cellulose-Based Aerogels Prepared via Combing Ionic Liquids Dissolving and Supercritical Drying Technique

Cellulose is the most abundant natural raw materials on the earth,and this sustainable,renewable and environmentally friendly biomass has been one of hot topics in the field of polymer materials.Cellulose aerogels,as the new generation succeeding the inorganic and synthetic polymer-based aerogels,have many excellent properties and are gaining the attention of researchers due to the combined extremely high porosity and ultralow density of nanoporous aerogel and good flexibility and excellent processability of biopolymer.In the present review,the research of our group on regenerated cellulose aerogels has been summarized,including the preparation of cellulose aerogels via a dissolution/regeneration route using ionic liquid as cellulose solvent followed by supercritical CO 2 drying,the preparation of cellulose-inorganics composite aerogels,and the application of cellulose-based aerogels as a matrix of gel polymer electrolytes for lithium-ion batteries.