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

Nowadays, the application range of biomass materials is more and more extensive. In this work, peanut shell powder was used as the raw material. The cellulose nanofibrils was extracted from it by chemical mechanical method. Then, using the sol-gel method, methyltrimethoxysilane (MTMS) was added to the peanut shell cellulose nanofibrils suspension to modify it. Finally, the nano-cellulose superhydrophobic aerogel was prepared by freeze-drying method. The nano-cellulose aerogel and polydimethylsiloxane (PDMS) were coated on the cotton fabric by spraying method, and the superhydrophobic aerogel and superhydrophobic cotton fabric were analyzed and characterized respectively. The results shown that the prepared nanocellulose aerogel had a three-dimensional sheet-like structure with superhydrophobicity. The hydrophobic property and water contact angle (WCA) of cotton fabrics were significantly improved after superhydrophobic finishing. The WCA can reached 160°, the finished fabric has good antifouling performance and self-cleaning performance, and the oil-water separation efficiency can reach 82.2%.