Preparation method of sparse/dense periodically stacked flocculent fiber filtering material

Abstract

The invention discloses a preparation method of a sparse / dense periodically stacked flocculent fiber filtering material. The preparation method is characterized in that an electrostatic spinning device is adopted, a liquid supply device is filled with a spinning liquid, a micro needle type auxiliary electrode is negatively charged or positively charged by regulating and controlling an alternating power supply in the spinning process, spinning jet flow is subjected to attractive force or repulsive force when approaching the receiving substrate, a compact flocculent fiber filtering material is obtained when the spinning jet flow is subjected to the attractive force, and a fluffy flocculent fiber filtering material is obtained when the spinning jet flow is subjected to the repulsive force; and the alternating power supply is regularly adjusted according to requirements, so that the sparse / dense periodically stacked flocculent fiber filtering material is obtained. The invention provides an efficient and convenient preparation method of a flocculent fiber high-temperature filtering material with a catalytic function.

Description

technical field [0001] The invention relates to a preparation method of a high-temperature filter material with sparse / dense periodic stacked floc fibers, belonging to the technical field of air filter materials. Background technique [0002] With the rapid development of our society, the environmental problems caused by industrial metallurgy, iron and steel, thermal power generation, etc. are becoming more and more significant. Filtering the smoke and dust generated by these industries will be the key to improving air quality. At present, the commonly used air filter materials are mainly glass fiber, polyphenylene sulfide, ceramic fiber, etc. Although these materials have high temperature resistance, their aggregate pore size is large, and it is difficult to filter fine particles (diameter > 0.3 μm) in the smoke and dust. Filtration; and its preparation process is complicated and the cost is high. [0003] The nanofiber material prepared by electrospinning has the advan...

AI Technical Summary

Problems solved by technology

[0005] Patent CN201911396614.5 discloses "A Nylon Nanofiber Airgel Material for Air Filtration and Its Preparation Method", and Patent CN201910057686.0 discloses "A Polyimide Nanofiber Airgel and Its Preparation Method and "Application", patent CN201911421836.8 discloses "A Preparation Method of Micro / Nanofiber Airgel Composite Filter Material", all of which obtain three-dimensional airgel by dispersing nanofibers in water, freeze-drying, thermal crosslinking, etc. Gel material, in order to improve the dust holding capacity of the material, but the preparation process of the material is complicated, the preparation cycle is long, and the airgel macroporous structure is difficult to effectively intercept the fine particles in the dust

[0006] Patent CN201510009971.7 discloses "A high-efficiency and low-resistance nanofiber air filter material for masks and its preparation method", which uses steam field compensation and control technology in the electrospinning process to control the jet phase separation rate to obtain a three-dimensional air filter material. Cavity material, although it has a high dust holding capacity, but its pore size is large, it is still unable to effectively intercept fine particles; and the steam field flow in the preparation process easily makes the jet flow turbulent, affecting the actual production

Patent CN201610381988.X discloses "A Preparation Method of Nanofiber Air Filter Material with Gradient Structure Combination of Thickness and Thinness", and Patent CN201610382452.X discloses "A Microbead / Nanofiber Composite Air Filter Material with Gradient Structure and Its Preparation Method", which prepares a three-dimensional filter material by hot-pressing the micro-layer and nano-layer. decline

Images