纤维素气凝胶及其疏水改性研究进展

Research Progress of Cellulose Aerogel and Its Hydrophobic Modification

纤维素气凝胶具有的低密度(≥8 kg/m^3)、低热导率(0.0201~0.0295 W/m·K)、高孔隙率(≤99.5%)、高比表面积(100~605 m^2/g)等使其在隔热、吸附、催化、储能等领域应用广泛,是多功能、轻质、纳米多孔材料。纤维素表面存在大量的羟基,氢键和亲水性使纤维素气凝胶在吸附油污等应用受限。利用三甲基氯硅烷(TMCS)、十八烷基三氯硅烷(OTS)等进行纤维素气凝胶的疏水改性,拓展其应用范围。

Cellulose aerogel with low density （≥8 kg/m^3）, low thermal conductivity（0.0201～0.0295 W/m·K）, high porosity （≤99.5%）, high specific surface area （ 100～605 m^2/g） is widely used in heat insulation, adsorption, catalysis, energy storage and other fields, is multi function, light weight, nano porous material. There are a lot of hydroxyl groups on the surface of cellulose, hydrogen bonding and hydrophilic make cellulose aerogel in adsorption of oil and other applications limited. Using trimethylchlorosilane （TMCS）, octadecyl trichloro silane （OTS） and modified cellulose aerogels with hydrophobic, expand the scope of its application.