Preparation method of nano-TiO2-loaded terylene-needled filtering material

Abstract

The invention discloses a preparation method of a nano-TiO2-loaded terylene-needled filtering material. The preparation method is characterized by comprising the following process steps of: (1) preparing a nano-TiO2 stable-water dispersing solution; (2) preparing a nano TiO2 / PTFE (Poly Tetra Fluoro Ethylene) composite finishing solution; (3) pretreating a needled filtering material; and (4) completely impregnating the needled filtering material obtained in the step (3) into the composite finishing solution prepared in the step (2) by adopting an impregnation method to obtain the nano-TiO2-loaded terylene-needled filtering material with a photocatalytic function. The preparation method disclosed by the invention has the advantages that measured by a photocatalytic degradation experiment, the photocatalytic degradation rate of the nano-TiO2-loaded terylene-needled filtering material to a methylene blue solution can reach more than 90%, and the once filtering and degradation rate of the nano-TiO2-loaded terylene-needled filtering material to formaldehyde is near 50%. The preparation method can be used for purifying air, treating sewage and the like. According to the preparation method, the functional needled filtering material with simple process and excellent photocatalytic effect can be obtained.

Description

technical field [0001] The invention relates to a loaded nano TiO 2 The invention discloses a preparation method of polyester acupuncture filter material, which belongs to the technical field of environmental protection. Background technique [0002] The needle-punched non-woven process prepares a non-woven material with random arrangement of fibers, multi-layer three-dimensional network structure, small pores and large porosity, which has better filtration performance than the two-dimensional structure filter material made of woven fabric, and can It can prevent the penetration of dust particles to the deep layer, so it is widely used in the field of filtration. However, due to the increasingly serious problem of environmental pollution, it is necessary to improve the structure of needle-punched filter materials and improve the filtration efficiency of small-size particles. At the same time, it is necessary to develop and apply functional filter materials to meet the requi...

AI Technical Summary

Problems solved by technology

However, there are still some limiting factors such as the development and application of finishing agent formulations, which hinder the industrial production of photocatalytic filter materials.

By preparing nano TiO 2 Dispersions, combined with the use of PTFE emulsions and adhesives, are rarely used in needle-punched filter media to improve filter performance and impart photocatalytic functions.

Images