Preparation method of cellulose acetate membrane surface crosslinked chitosan hydrophilic membrane

Abstract

The invention provides a preparation method of a cellulose acetate membrane surface crosslinked chitosan hydrophilic membrane and belongs to the technical field of membrane surface modification. A cellulose acetate membrane is activated by an acid solution, and has coupling crosslinking with the acetic acid water solution of the chitosan, so that a hydrophilic membrane material of the cellulose acetate membrane surface crosslinked chitosan can be prepared. The preparation method of the invention is simple in technology, low in cost, natural, and environmentally-friendly. The cellulose acetate membrane modified by the method is good in hydrophillic nature and binding capability, is good in mechanical strength and mechanical toughness, can be widely applicable to the field of biochemistry, molecular biology and environment, such as the immunoassay, the protein and DNA (deoxyribonucleic acid) analysis, the colloidal gold detection card, the absorption and removal of the toxic and harmful substances in the environment such as the environmental hormone and the like, and can be taken as biomedical material due to the improvement of the mold resistance of a cellulose acetate membrane.

Description

[0001] technical field

[0002] The invention belongs to the technical field of polymer materials and the technical field of membrane surface modification. The invention relates to a preparation method of a non-toxic cellulose acetate membrane surface cross-linked chitosan hydrophilic membrane with simple process. Background technique

[0003] Cellulose acetate membrane is made of pure acetate cellulose, which has the advantages of high selectivity, good chlorine resistance, and simple membrane making process. Currently, such membranes are ideal for biological and clinical analysis, sterility testing, and scintillation measurements. However, due to the poor chemical, thermal stability and compactness of the cellulose acetate film, the film quality is brittle, and the mechanical properties are poor, which seriously limits its application range and performance. In recent years, the development of modified cellulose acetate membranes for different purposes has been carried ou...