Nano antiseptic material-polysulphone composite microporous filter film and its preparing method

A nano-antibacterial material, microporous membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of no research and application, no MF membrane material for water treatment, etc., to improve Mechanical properties, the effect of preventing membrane surface contamination

Inactive Publication Date: 2007-09-05
SANITARY EQUIP INST ACAD OF MILITARY MEDICAL SCI PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"Coating Industry" Vol.34.No.5.(2004) reported nano-TiO 2 The preparation and performance characterization of composite organic antibacterial coating film, in which the organic matter is styrene-acrylic acid polymer, the experimental results show that the organic coating film has good antibacterial / bactericidal effect, but it has not been made into MF membrane material for water treatment. No research on its application in water treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]It is 10% polysulfone (abbreviated as PS, industrial grade, produced by Shuguang Chemical Factory of Shanghai Plastics Industry United Corporation) with the dried mass percentage, dissolved in 65% solvent N, N-dimethylformamide (abbreviated as PS) DMF, analytically pure, Tianjin Beichen Huayue Chemical Reagent Factory), then add the macromolecular porogen polyvinylpyrrolidone (abbreviated as PVP, K-30, molecular weight 40,000, analytically pure, U.S. import, Shanghai Reagent Purchasing Station sub-package), stir with agitator, obtain clear and transparent polymer solution, account for the nano-silver antibacterial agent (industrial grade, average of Particle size 8nm, Jiangsu Hehai Nano Technology Co., Ltd.), gradually added to the polymer solution under the action of ultrasonic waves, and continued to stir for 30 minutes to obtain a mixed casting solution, which was left to stand for more than 24 hours for defoaming, filtered to remove impurities, and then dried / Wet p...

Embodiment 2

[0030] 10% by mass of PS was dissolved in 68% by mass of solvent DMF, and then 12% by mass of polymer porogen PVP was added and stirred with a stirrer to obtain a clear and transparent polymer solution. The nano-titanium dioxide (Zhejiang Zhoushan Mingri Nano Material Co., Ltd., industrial grade, average particle diameter 5nm) dispersed in a solvent with a mass percentage of 10% and accounted for PS content of 0.5% was gradually added to the polymer solution under the action of ultrasonic waves. The same method as in Example 1 was used to form a film. The obtained nano-titanium dioxide-polysulfone composite microporous membrane has an average pore size of 0.17 μm, a porosity of 86.2%, and a pure water permeation flux of 120 L / m 2 ·min(0.1MPa), maximum stress 1.14N / mm 2 , breaking stress 1.14N / mm 2 . The antibacterial experiment showed that when 48W ultraviolet lamp was irradiated for 30 minutes, the range of inhibition zone was 0.7-1.74mm around the diaphragm.

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PUM

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Abstract

The present invention relates to a kind of composite nano antiseptic material-microporous polysulfone filter film and its preparation process. The microporous filter film consists of polysulfone and nano antiseptic material as well as additive. The preparation process includes the following steps: compounding mixed casting solution with polysulfone, solvent, additive and antiseptic material; letting stand to debubble and filtering to eliminate impurity; scraping film in dry/wet phase converting method and soaking into solidifying bath to form film; and soaking in pure water. The composite nano antiseptic material-microporous polysulfone filter film can filter and sterilize simultaneously while avoiding film pollution. It may be used in medicine production and drinking water purification to raise water quality.

Description

technical field [0001] The invention relates to a preparation method of a nanometer antibacterial material-polysulfone composite microporous filter membrane, in particular to a preparation method of a composite microporous filter membrane with polysulfone as a film-forming material and nanometer antibacterial material as a modified additive. Background technique [0002] Various bacteria and viruses often breed in stored water or pipeline water. In order to inhibit their growth, people have taken many measures, including adding disinfectants to the water, such as chlorine, or heating, ultraviolet disinfection, etc., or using ultrafiltration (UF), microfiltration (MF) and other membrane separation technology filtration methods. However, adding disinfectant to water will cause different degrees of side effects on the human body, and heat disinfection will complicate the structure of water treatment equipment and increase costs. [0003] UF, MF and other membrane separation te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/68B01D69/12B01D65/02
Inventor 游秀东刘红斌马军龚承元苏建勇朱孟府肖镇王济虎
Owner SANITARY EQUIP INST ACAD OF MILITARY MEDICAL SCI PLA
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