Preparation method of photocatalytic antimicrobial polytetrafluoroethylene microporous membrane

A polytetrafluoroethylene, microporous membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation and other directions, can solve the problem of inability to remove ultrafine particles of harmful substances and harmful elements, and achieve a simple preparation process. Effect

Active Publication Date: 2012-07-04
HUZHOU SENNUO FLUORINE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the chemical inertness of PTFE, it can only play a physical interception, but cannot remove harmful substances and harmful elements carried on ultrafine particles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, the preparation method of photocatalytic antibacterial polytetrafluoroethylene microporous membrane, it comprises the following steps:

[0022] ① Mixing: Mix the nano-silver antibacterial agent produced by Shanghai Shanghui Nano Technology Co., Ltd. and the F1065 polytetrafluoroethylene dispersion resin powder produced by Daikin Chemicals in Japan, and then add ExxonMobil’s ISOPARK as a hydrocarbon extrusion aid agent, the three are fully mixed in a ratio of 0.05:1:0.25 by weight, and left to stand at 50°C for 24 hours to form a material;

[0023] ② Billet making: pre-press the material into a cylindrical billet of Ф120mm at 50°C;

[0024] ③Extrusion: Place the cylindrical billet on the pusher, and push it into a round bar of Ф22mm at 55°C;

[0025] ④ Calendering: place the round bar on a calender, and calender it at 70°C to form an oil-containing base belt with a thickness of 150 microns;

[0026] ⑤ Longitudinal stretching after degreasing treatment: De...

Embodiment 2

[0030] Embodiment 2, the preparation method of photocatalytic antibacterial polytetrafluoroethylene microporous membrane, it comprises the following steps:

[0031] ① Mixing: Mix the nano-silver antibacterial agent produced by Shanghai Shanghui Nano Technology Co., Ltd. and the FD3309 polytetrafluoroethylene dispersion resin powder produced by DuPont, and then add ExxonMobil’s ISOPARK as a hydrocarbon extrusion aid. The three are fully mixed in a ratio of 0.1:1:0.28 by weight, and left to stand at 50°C for 24 hours to form a material;

[0032] ② Billet making: pre-press the material into a cylindrical billet of Ф120mm at 50°C;

[0033] ③Extrusion: Place the cylindrical billet on the pusher, and push it into a round bar of Ф20mm at 60°C;

[0034] ④ Calendering: place the round bar on a calender, and calender it at 70°C to form an oil-containing base belt with a thickness of 120 microns;

[0035] ⑤ Longitudinal stretching after degreasing treatment: Degrease the oil-containing...

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Abstract

The invention relates to the technical field of air environmental protection, in particular to a preparation method of a photocatalytic antimicrobial polytetrafluoroethylene microporous membrane. The preparation method comprises the following steps: mixing a nano-silver antimicrobial agent and polytetrafluoroethylene dispersion resin powder, blending, making a blank, extruding, calendering, longitudinally after degreasing treatment, longitudinally stretching after surface treatment, and sintering and curing after transverse stretching. The photocatalytic antibacterial polytetrafluoroethylene microporous membrane prepared by the preparation method is simple in process, economical and practical; the average pore size is 0.5-3 microns, the porosity is more than 80%, and the filtering efficiency is more than 99%; the killing rates of the photocatalytic antibacterial polytetrafluoroethylene microporous membrane for escherichia coli and staphylococcus aureus are more than 90%; and the photocatalytic antibacterial polytetrafluoroethylene microporous membrane can effectively degrade formaldehyde and other volatile organic compounds and has antimicrobial, bactericidal and deodorant functions and the like.

Description

Technical field: [0001] The invention belongs to the technical field of air environment protection, and more specifically relates to a preparation method of a photocatalytic antibacterial polytetrafluoroethylene microporous membrane. Background technique: [0002] In recent years, due to the rapid development of industry, ultrafine particles in industrial dust have seriously affected the weather quality around the world, and are the main pollutants of air visibility, and the frequency of haze weather is increasing. Pm2.5 ultrafine particles have a small radius, strong mobility, and contain harmful substances such as mercury and sulfate, which seriously endanger people's health. At the same time, air pollution and interior decoration also induce various diseases, such as respiratory tract infection, heart disease, bronchitis, asthma, pneumonia, emphysema, lung cancer and other diseases. According to the statistics of the National Testing Center, the number of deaths caused b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/02B01D71/36B01D67/00
Inventor 王中华张建军俞锦伟吴辉周明明张振刚曹建根
Owner HUZHOU SENNUO FLUORINE MATERIAL TECH
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