| abstract |
The invention provides a preparation method and application of a nano microcrystalline cellulose/dopamine composite membrane, which relate to the field of semipermeable membrane materials and comprise the following steps: preparing prefabricated cellulose; preparing nano microcrystalline cellulose; mixing nano microcrystalline cellulose, dopamine, K-carrageenan and N-methyl morpholine oxide, heating to 110-120 ℃, stirring for 30-40min to dissolve, adding a trihydroxymethyl aminomethane buffer solution to adjust the pH value to 8-9, standing for 20-25h, then carrying out vacuum defoaming to obtain a membrane solution, casting the membrane solution onto a polytetrafluoroethylene glass plate, putting the polytetrafluoroethylene glass plate into an oven for vacuum drying at 30-50 ℃ for 10-15h, immersing the polytetrafluoroethylene glass plate into deionized water, scraping the membrane by a scraper, and drying. |