Abstract:Herein, a kind of super-hydrophobic cellulose/chitosan hybrid aerogel was prepared via a “freeze-thaw-impregnation” two-step method, in which cellulose and chitosan worked as double network units with sodium hydroxide/urea/water as solvent system and methyl trimethoxysilane (MTMS) acted as modifier. A series of characterizations show that the hybrid aerogel presents a three-dimensional interpenetrating porous structure, and the contact Angle gradually raises first and then decreases sharply with the incorporation of MTMS. When the concentration of MTMS is 1.96 g/μL, the hydrophobic effect reaches the optimal with the contact Angle of 151°. In addition, the aerogel displays good oil/water selective absorption performance with the maxmium oil absorption capacity of 9.3 g/g. After the 5th regeneration, the adsorption capacity for isopropyl alcohol can still maintain 92.8 % of its initial value, indicating a benign and renewable biomass-based oil absorption material.