Nanoscale composite filter material based on electrostatic spinning technology of aramid fibers and preparation method thereof

Abstract

The invention relates to the technical field of new materials, and discloses a preparation method of a nanoscale composite filter material based on an electrostatic spinning technology of aramid fibers. The preparation method comprises the following steps: preparing an aramid needled felt; spraying nanofibers onto the aramid needled felt at a high speed through an electrostatic spinning spinneret by using a spinning liquid spinning method of electrostatic spinning to form a layer of electrostatic spinning nanofiber film, and forming the composite filter material from the electrostatic spinning nanofiber film and the aramid needled felt; and drying and disinfecting the composite filter material, and packaging the composite filter material into a roll. According to the nanoscale composite filter material based on the electrostatic spinning technology of the aramid fibers and the preparation method of the nanoscale composite filter material, by arranging the electrostatic spinning nanofiber film and the aramid needled felt and adopting the spinning liquid spinning method, large-scale uniform preparation of the electrostatic spinning nanofiber film can be achieved, attachment of the aramid fiber nanofiber film on the surfaces of different base materials is achieved, and the filtering efficiency and the filtering precision of a conventional filtering material are greatly improved.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a nano-scale composite filter material based on aramid electrospinning technology and a preparation method thereof. Background technique [0002] The term "electrospinning" comes from "electrospinning" or earlier "electrostaticspinning", which is generally referred to as "electrospinning" and "electrospinning" in China. The preparation of nanofiber materials by electrospinning technology has become the world's most popular technology in the past ten years. One of the most important academic and technical activities in the field of material science and technology. Electrospinning has become an effective method for preparing nanofiber materials due to its simple manufacturing device, low spinning cost, various types of spinnable materials, and controllable process. One of the main ways. The electrospun nanofiber membrane has smaller pore size and higher porosity, good pore co...

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Problems solved by technology

[0003] However, the mechanical properties of the existing nanofiber films themselves are relatively low, and they need to be compounded with the carrier; electrospinning has formed a relatively mature preparation system in the laboratory, but the laboratory can only realize the preparation of small-area nanofiber films. It is difficult to prepare large-scale and uniform electrospun nano-films; meta-aramid fiber (PMIA) has outstanding flame retardancy and is one of the commonly used filter materials in the field of high-temperature dust removal. However, due to its excellent thermal stability, melt-blown nano Membrane is more difficult

At present, the PTFE melting point coating on the dust-facing surface is used to improve its filtration accuracy, but the melting point will cause great damage to the PTFE membrane, and the coating effect needs to be improved.

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