Preparation method of sandwich type anti-microbial composite nanometer filtering material for scavenging formaldehyde with high efficiency and low resistance

Abstract

The invention discloses a preparation method of a sandwich type anti-microbial composite nanometer filtering material for scavenging formaldehyde with high efficiency and low resistance, and the method comprises the following steps: a nanoparticle bonding solution is prepared; nanoparticles are coated; spinning liquid is prepared; a nanometer fibrous layer is formed by electrostatic spinning; a covering layer is attached on the nanometer fibrous layer, in order to form a three-dimensional multidimensional sandwich structure which is composed of a supporting layer containing nanoparticles, thenanometer fibrous layer and the covering layer. The method has simple design technology, and the material has high filtering efficiency and low air resistance for PM 2.5; the material has small pressure drop and can dedust, so that the problems of low efficiency and high resistance of traditional air cleaning materials are overcome; the product is advantageous in that the material can precipitateharmful PM2.5, formaldehyde and a plurality of substances which are harmful for human bodies in indoor space or newly finished rooms in a short period of time, and the like; and at the same time, theproduct has excellent antibacterial properties and formaldehyde scavenging performance.

Description

technical field [0001] The invention relates to the field of materials, more specifically, to a method for preparing a sandwich-type high-efficiency and low-impedance bacteria-removing formaldehyde composite nano-filter material. Background technique [0002] Ordinary air filter materials generally only rely on mechanical barriers, that is, through mechanisms such as inertial deposition, gravity deposition, and diffusion effects, to intercept the flowing dust in the gas to achieve the purpose of filtration. [0003] The filter material prepared by electrospinning is considered to be the most ideal filter due to its ultra-fine fiber, large specific surface area and high porosity. As an air filter material, it has efficient deep filtration performance, low air resistance and good processing performance. The method of preparation of the material. Especially after forming an electret with a stable electric field through certain physical and chemical methods, the efficiency can ...

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Problems solved by technology

[0005] However, because the nano-filtration material prepared by electrospinning cannot meet the requirements in terms of mechanical properties, and the addition of formaldehyde-degrading nanoparticles will increase the difficulty of the fiber preparation process, its application is limited to a certain extent.

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