Method for preparing antimicrobial modified polyvinyl alcohol-nonwoven compound microporous filtering film

Abstract

The present invention belongs to the preparation technical field of the micro-filtering and ultra-filtering compound film, and relates to a method for preparing the antibiosis modified polyvinylalcohol-non-woven compound micro-hole filtering film, which is characterized in that the method comprises the following steps: casting film solution consisting of pyridine modified polyvinylalcohol, cross-linked agent and catalyst is prepared; the prepared casting film solution is performed the static deaeration and is filtered to remove the undissolved substance; under the sub-pressure effect, the filtered solution is coated on a post-treated melt-blown polypropylene non-woven cloth to be heat-treated, dried and washed to neutrality, and then to be undertaken the quaternize treatment; the film piece is immersed in the pure water for use. The method of the present invention has the advantages that the prepared compound film has favorable mechanical performance and chemical stability, and the surface of the film is neat and smooth. Particularly, the compound film has dual functions of hydrophile and antibiosis, and can reduce the absorption of the pollutant on the surface of the film, and can prevent the bacteria from breeding on the surface of the film, and maintaining the fluent property of the film holes, and has good micro-organism-pollution resistant property, and can be widely applied to the water treatment process in the fields such as the environment, the chemical industry, the food, the medical, etc.

Description

technical field [0001] The invention belongs to the technical field of preparation of microfiltration and ultrafiltration composite membranes, and relates to a preparation method of an antibacterial modified polyvinyl alcohol-nonwoven composite microporous filtration membrane. Background technique [0002] Due to the outstanding advantages of membrane separation technology, it has recently made great progress in the application of advanced sewage treatment, biochemistry, medicine, beverages and other fields. Membrane fouling is the primary problem affecting the membrane separation process. Membrane fouling will lead to clogging of membrane pores, decrease in membrane flux, and difficulty in cleaning and recovery. It is the bottleneck in the development of membrane separation technology. The main membrane fouling in the water treatment process includes colloidal particle fouling and microbial fouling. The antifouling modification of membranes mainly focuses on hydrophilic mo...

AI Technical Summary

Problems solved by technology

However, the method of modifying the antibacterial performance of this membrane material is to directly graft on the hydrophobic membrane, which can not reduce the adsorption of other pollutants except for the inhibition of microbial pollution, and the preparation method of this method is complicated and not suitable for all membrane materials

[0005] At present, the composite membrane technology with hydrophilic and anti-fouling properties and anti-microbial fouling properties has not been reported yet.