Polyvinylidene fluoride/nano cellulose superhydrophobic material and preparation method thereof

The invention discloses a polyvinylidene fluoride (PVDF)/nano cellulose superhydrophobic material and a preparation method thereof. The preparation method comprises the following steps: (1) dissolving PVDF into dimethyl formamide to prepare a PVDF solution; (2) adding nano cellulose into the PVDF solution, and mixing to obtain a mixed solution, wherein the mass ratio of nano cellulose to PVDF is 1-5:100; (3) under an enclosed condition, contacting the mixed solution with methanol to carry out mass transfer to obtain gel; (4) placing the gel in water, and freeze-drying the gel to obtain the PVDF/nano cellulose superhydrophobic material. According to the preparation method, the ratio of raw materials is and phase change process are reasonably controlled, and a freeze-drying technology is adopted to prepare the PVDF/nano cellulose superhydrophobic material, the contact angle between the material and water can reach 150 degree or more, and the material has an excellent oil-absorbing performance and thus can be used to separate water and oil in high efficiency.