Production method of nucleus micropore filtering film of optimizing flow passage

Abstract

The invention discloses a manufacturing method of a nucleopore filtration film to optimize flow passages in the technology field of liquid filtration. The manufacturing method is that a heavy ion accelerator or a reactor is used to radiate an insulation film and radiation damage is formed inside the insulation material; a solvent type release layer is coated on the insulation film; an alkalifast adhesive film is compounded on the surface of the release layer at low temperature to form a composite film; subsequently, under the optimized etching condition, the composite film is etched on one side under the protection of the adhesive film, thus forming non-biconical micropores; the release layer is stripped off at ordinary temperature; the microporous film is washed in de-ionized water before the composite film is dried. The microporous film made by using the method can have the thickness more than 10 micrometers, the opening rate on the upper surface of the film less than 1 percent and the porosity on the lower surface more than 10 percent. When the microporous film is used for liquid filtration, the flow resistance is small, the flow is large, granules are unlikely to be absorbed and cause dead end filtration. The method provided by the invention is applicable for producing films in batch; the process is well-developed; product quality is controlled easily and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of liquid filtration, and in particular relates to a method for manufacturing a nuclear microporous filtration membrane with optimized flow channels. Background technique [0002] Both water and common chemical reagents contain more or less invisible solid particles, which often cause harm to industrial production and human health. At present, microporous membrane filtration technology is usually used to remove the above-mentioned solid particles. However, this microporous membrane is not a nuclear pore membrane with a single pore size. [0003] In the microelectronics industry, the wire width and spacing of modern components are on the order of microns. If the raw materials for making components contain micron-sized dust particles, it will cause wire breakage or short circuit. Or circuit parameters will change, making tens of thousands of electronic components. The components become waste products; anothe...

AI Technical Summary

Problems solved by technology

When the porosity increases, adjacent track-etched pores will overlap and merge into multiple pores with a diameter larger than that of a single pore and irregular shapes, which will deteriorate the selectivity of the filter membrane.