Preparation of peanut shell cellulose nanofibrils and their superhydrophobic aerogels and their application on cotton fabrics

Nowadays, the application range of biomass materials was more and more extensive.In this work,peanut shell powder was used as the raw material. The nanocellulose is extracted from it by chemical mechanical method.Then, using the sol-gel method, methyltrimethoxysilane(MTMS) is added to the peanut shell nanocellulose suspension to modify it. Finally, the nano-cellulose superhydrophobic aerogel was prepared by freeze-drying method. The nano-cellulose aerogel and polydimethylsiloxane (PDMS) were finished on the cotton fabric by spraying method, and the superhydrophobic aerogel and superhydrophobic cotton fabric were analyzed and characterized respectively. The results show that the prepared nanocellulose aerogel has a three-dimensional sheet-like structure with superhydrophobicity. The hydrophobic properties and water contact angle (WCA) of cotton fabrics were significantly improved after superhydrophobic finishing. The WCA can reach 160.4°, the finished fabric has good antifouling performance and self-cleaning performance, and the oil-water separation efficiency reaches 82.2%.