Method for modifying medical cotton gauze

Abstract

The invention relates to a physical-chemical method for modifying ordinary medical degreased cotton gauze, which aims to improve the adsorption property and antibacterial property of the medical cotton gauze. The method mainly comprises the following technical steps of: degreasing the cotton gauze; swelling the degreased cotton gauze with high-concentration caustic soda; washing the swollen cotton gauze with hot water; neutralizing the washed cotton gauze with an acid; washing the neutralized cotton gauze with cold water; performing antibiotic finish on the washed cotton gauze with a pomegranate rind extract serving as a natural antibacterial agent; refrigerating the treated cotton gauze at a low temperature; and performing freeze drying on the refrigerated product. After loose cotton fiber is swollen by concentrated caustic soda solution (mass percent concentration is between 20 and 28 percent), gaps in the fiber are increased and enlarged, and tight macromolecules become loose, so that antibacterial active ingredients in the pomegranate rind extract which is safe, nontoxic and low-cost can be adsorbed on the cotton fiber, and the antibacterial property of the cotton gauze is improved. Drying is performed by freeze drying technology instead of the conventional drying or air drying, so that gaps formed in the swelling and refrigerating processes of the cotton fiber can be kept fully, and the adsorption property of the cotton fiber is improved.

Description

technical field [0001] The invention relates to a modification method of medical cotton gauze, in particular to a modification method for improving the adsorption and antibacterial properties of ordinary cotton medical gauze. It belongs to the technical field of natural fiber modification. Background technique [0002] Improve the antibacterial and adsorption properties of ordinary medical cotton gauze to reduce wound infection and accelerate wound healing. The invention patent (publication number CN1201696) relates to a processing method for antibacterial, hemostatic and non-adhesive wound dressings, which is to degrade the degreasing gauze by pickling, graft etherification, neutralization, washing, impregnating antibacterial agents and steam drying. Dry processing and other steps are completed. Invention patent (publication number: CN1348819) relates to frozen absorbent hemostatic cotton and its preparation method, which is to form hemostatic fiber fabric after natural s...

AI Technical Summary

Problems solved by technology

During the freeze-drying process, the solid component is supported by the solid ice on its seat, and when the ice sublimates, pores will be left in the dried remaining material. Therefore, the freeze-dried material is loose and porous, and it is sponge-like. After absorbing water quickly, the original properties are restored almost immediately, that is, the rehydration is good, while the traditional drying method will cause the material to shrink and destroy the cells