The invention relates to a method for preparing an NCC / CS / PVA composite
nanofiber membrane. NCC is rod-shaped particles, wherein the
diameter of each particle ranges from 20 nm to 60 nm, and the particles are highly crystallized. The method comprises the steps that (1) an NCC / CS solution is prepared, wherein the concentration of the NCC, by weight, ranges from 0.09% to 0.21%; (2) an NCC / PVA solution is prepared, wherein the concentration of the NCC, by weight, ranges from 0.4% to 0.8%; (3) an
acetic acid solution,
tetraethyl orthosilicate, the NCC / CS solution obtained in the step (1) and processed through
ultrasound, and the NCC / PVA solution obtained in the step (2) and processed through
ultrasound are mixed to obtain a
spinning solution, and the
nanofiber membrane is obtained through the
electrospinning technology, wherein the
mass ratio of the
acetic acid solution to the
tetraethyl orthosilicate to the NCC / CS solution to the NCC / PVA solution is (2.5-3.5):(1.5-2.5):5:5; (4) the obtained
nanofiber membrane is immersed in an alkaline solution for 2-6 hours at the normal temperature, and the
membrane structure can be stable. The method for preparing the NCC / CS / PVA composite nanofiber membrane has the advantages that the nanofiber material preparation process is simple, the preparation process is
environmentally friendly and free of
pollution, nanofibers are excellent in mechanical performance, the surface of the nanofiber membrane is rich in modifiable functional groups, and the nanofiber membrane has a remarkable affinity effect on biomacromolecule.