Preparation method of high-strength fluid separation medium

Abstract

The invention discloses a preparation method of a high-strength fluid separation medium. The preparation method comprises the following steps: 1) mixing precursor raw material components of a hyperbranched polymer to obtain a blend; 2) mixing glass microfibers and other fibers, and uniformly dispersing; (3) taking the fibers dispersed in the step (2), and forming a multi-fiber-layer material of which the pore size is changed from top to bottom by adopting a one-time forming deposition mode or a multi-time forming deposition mode; (4) applying the hyperbranched polymer precursor component blend aqueous solution obtained in the step (1) into the multi-fiber-layer material obtained in the step (3) in a spraying or soaking or capillary migration manner; and 5) crosslinking the material obtained in the step 4) at a high temperature of 120-250 DEG C to form a final product, namely the high-strength fluid separation medium. According to the fluid separation medium prepared by the method disclosed by the invention, three indexes, namely air permeability, transmittance and tensile strength, are balanced, the strength of filter paper is improved while the air permeability is not reduced and the transmittance is not influenced, and the service life of a product is prolonged.

Description

technical field [0001] The invention relates to the technical field of filter materials, in particular to a preparation method of a high-strength fluid separation medium. Background technique [0002] At present, fluid filtration and separation media are widely used in all walks of life. Usually, fluid filtration and separation media are composed of fiber nets. To achieve the purpose of separation or purification. Fluid filtration separation media is currently widely used in various filter elements or filters. [0003] However, the current filter media generally have the problem of insufficient strength and cannot meet various application conditions. There are studies to improve the strength by compounding or adding adhesives without affecting the transmittance, but this method will lead to a decrease in air flow, which will increase the energy consumption of the filter equipment during operation and reduce the service life of the filter medium. [0004] Therefore, there ...

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Problems solved by technology

[0003] However, the current filter media generally has the problem of insufficient strength, which cannot meet various application conditions.

There are studies to increase the strength by compounding or adding adhesives without affecting the transmittance, but this method will lead to a decrease in air flow, thereby increasing energy consumption during the operation of the filter equipment and reducing the service life of the filter medium

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