Nano cellulose glass fiber composite filter material as well as preparation method and application thereof

Abstract

The invention belongs to the field of filtration, and particularly relates to a nano cellulose glass fiber composite filter material and a preparation method and application thereof. The method comprises the following steps: (1) defibering fibrillable plant fibers by a defibering machine, and dispersing in water to obtain slurry; (2) performing treatment by a physical or chemical method to obtainnanocellulose, and washing and ultrasonically treating to obtain a nanocellulose solution; (3) adding water and a dispersing agent into the glass fiber raw material, uniformly dispersing to obtain slurry, and sequentially deslagging, diluting, forming and dehydrating to form wet paper sheets with uniform thickness; (4) coating the surface of glass fiber paper with the nano-cellulose solution in acoating manner to form a nano-fiber coating; (5) drying and forming. The nano cellulose solution prepared from the plant fibers is compounded with the glass fiber base material in a coating manner, sothat the obtained fiber material has the advantages of high precision, high air permeability, low resistance, long service lifetime and the like, and is particularly suitable for the field of filtering of air, water and the like.

Description

technical field [0001] The invention belongs to the field of filtration, in particular to a nano-cellulose glass fiber composite filter material and its preparation method and application. Background technique [0002] Although traditional glass fiber filter materials can effectively filter pollutant particles, it usually needs to sacrifice air permeability to achieve higher filtration efficiency, resulting in a larger pressure drop. Therefore, it is difficult to achieve an effective balance between filtration efficiency and piezoresistance only by the structural characteristics of the glass fiber itself. [0003] In recent years, more and more researches have been focusing on the preparation of composite filter materials of nanofibers and glass fibers, which on the one hand can make the filter material have ultra-high filtration accuracy, and on the other hand can retain the characteristics of glass fiber deep filtration. The existing method for preparing the composite fil...

AI Technical Summary

Problems solved by technology

But there are following problems in this method: the organic polymers such as polyacrylonitrile, polytetrafluoroethylene, polyurethane that adopt also use a large amount of such as tetrahydrofuran, N dimethyl formamide, N in the spinning process, Organic reagents such as N-dimethylacetamide, dimethyl sulfoxide, and acetone are very unfriendly to the environment, and the efficiency of electrospinning is low, which is not suitable for industrial production, etc.

However, a large amount of chemicals are also added in the preparation process of the cellulose nanofibers of the above method, and in the process of making the cellulose nanofiber slurry and other substances into pulp, the cellulose nanofiber slurry is difficult to disperse and flocculates. problems such as poly, making the performance of the final product poor