Novel environment-friendly composite material for air purification and preparation method thereof

Abstract

The invention discloses a novel environment-friendly composite material for air purification and a preparation method of the novel environment-friendly composite material, and belongs to the technicalfield of environment-friendly materials. The preparation method includes the steps that under the condition that a nanofiltration layer is used for supporting, a microfiltration layer and a primary filtration layer are arranged on the surface of the nanofiltration layer, and the novel composite material of a sandwich structure is obtained; the primary filtration layer is a three-dimensional graphene aerogel material prepared by self-assembly of polyethyleneimine and graphite oxide; the microfiltration layer is a micron fiber layer prepared from a chitosan solution through electrostatic spinning; the micron fiber layer is loaded with a functional ceramic material and activated carbon in the presence of thiolactic acid and sodium benzoate; and the nanofiltration layer is a nanofiber layer prepared from a chitosan solution through electrostatic spinning. According to the preparation method provided by the invention, the filtering efficiency and the purification effect of the material canbe improved, and the rising trend of resistance pressure drop in use is slowed down, so that a good purification effect is kept after the material is cleaned and maintained, the cleaning durability and the reusability are enhanced, the preparation cost is low, and the material can be naturally degraded.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly materials, and in particular relates to new environment-friendly composite materials for air purification and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of urban industrialization in my country, the negative impact of ecological damage, air pollution has become increasingly serious, and air quality has further deteriorated, which not only endangers people's normal life, but also causes harm to people's physical and mental health. The requirements for purification are also getting higher and higher. Especially in recent years, with the wide application of building decoration materials, various materials release a large amount of harmful substances (such as: formaldehyde, toluene, benzene and other volatile organic pollutants) which seriously pollute the indoor air environment; the air also contains a large amount of Pollutant...

AI Technical Summary

Problems solved by technology

[0004] However, the existing air purification materials are mainly aimed at the removal of suspended particulate matter in the air, and at the same time have the functions of removing formaldehyde, sterilization and deodorization, etc. However, the effect on the removal of heavy metal pollutants in the air is not good.

Moreover, most air purification materials have great deficiencies in filtering PM2.5, submicron dust, especially nano-scale particle purification, and their filtration efficiency needs to be improved; and these air purification materials are disposable items, after use It will become a large amount of domestic waste, which will make the already fragile environment worse

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