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A self-supporting self-cleaning micro-nano through-hole filter membrane and its preparation method

A self-cleaning and self-supporting technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. Cleansing effect, strong hydrophilic effect

Inactive Publication Date: 2018-08-17
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems of current various filter membranes include: because the filter holes of the filter membrane are not straight through holes, the filtration flux of the filter membrane is seriously reduced; the filter membrane is easily polluted, difficult to clean, and has poor reusability; The depth diameter of the filter membrane is relatively small, and additional support membranes are required.

Method used

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  • A self-supporting self-cleaning micro-nano through-hole filter membrane and its preparation method

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Embodiment Construction

[0054] see figure 1 As shown, a self-supporting self-cleaning Wiener straight-through pore filter membrane of the present invention is processed by a die-casting process assisted by an electric field, and its preparation method comprises the following steps:

[0055] (1) Using a polished hard substrate (such as a commercially available polished copper sheet, silicon wafer, glass sheet) (or a flexible substrate (such as a commercially available polycarbonate film PC)), sputtering deposits a layer of conductive layer on its surface (such as metal chromium Cr layer, 50 nanometer thickness); 2 layer, 200 nm thick); if the polished hard substrate (such as commercially available polished copper sheet, highly doped conductive silicon sheet) (or flexible substrate (such as commercially available conductive polycarbonate film PC)) conducts itself, then It only needs to sputter a layer of insulating layer (such as silicon dioxide layer, 200 nanometers thick) on its surface;

[0056] (...

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Abstract

The invention discloses a self-supporting and self-cleaning micron-nano straight-through hole filter membrane and a preparation method thereof.Multiple straight-through holes are formed in the filter membrane; nano particles with a supporting effect are evenly distributed in the filter membrane.Machining is conducted through the die casting process with the assistance of an electric field, and straight-through type micron-nano filter holes with precise and controllable sizes can be manufactured.By means of the filter membrane, various particles on the micron size or the nano size can be conveniently filtered out, no additional supporting membrane is needed, high self-cleaning performance is achieved, and the filter membrane can be reused after being cleaned.

Description

technical field [0001] The invention belongs to the technical field of micro-nano processing, and in particular relates to a through-hole filter membrane and a preparation method thereof. Background technique [0002] The increasingly serious environmental pollution in the world, such as air pollution, water pollution, etc., makes people have more and more needs for various filtration membranes, especially filtration membranes that can filter micron to nanoscale particles. The main problems of current various filter membranes include: because the filter holes of the filter membrane are not straight through holes, the filtration flux of the filter membrane is seriously reduced; the filter membrane is easily polluted, difficult to clean, and has poor reusability; The depth diameter of the filter membrane is relatively small, and additional support membranes are required. Contents of the invention [0003] The purpose of the present invention is to provide a self-supporting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/02B01D67/00
CPCB01D67/0079B01D69/02
Inventor 叶向东贺利乐李冀张学锋蔡安江
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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