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Antibacterial polyolefin microfiltration membrane and preparation method thereof

A polyolefin and microfiltration membrane technology, which is applied in the field of membrane separation, can solve the problems that the antibacterial effect of polyolefin microfiltration membrane cannot be maintained for a long time, and the antibacterial effect is poor.

Active Publication Date: 2011-04-06
盐城海普润科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an antibacterial polyolefin microfiltration membrane, which solves the problems in the prior art that the antibacterial effect of the polyolefin microfiltration membrane cannot be maintained for a long time and the antibacterial effect is poor, and obtains a microfiltration polymer with excellent and long-lasting antibacterial performance. Olefin film and its preparation method

Method used

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  • Antibacterial polyolefin microfiltration membrane and preparation method thereof
  • Antibacterial polyolefin microfiltration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] 1) Add ultra-high molecular weight polyethylene L5000 type (Mitsui Corporation of Japan), DCOIT (Shijiazhuang Boya Xinyi Technology Co., Ltd.), DCP (Sunshine International Industry Group Co., Ltd.) to 300# liquid paraffin (Tianjin Fuyu Fine Chemical Co., Ltd. company) and mixed evenly, put it into a twin-screw extruder and extrude at 200°C, and keep a vacuum of -0.09MPa during extrusion; wherein: every 100 parts by weight of the casting solution contains ultra-high molecular weight polyethylene. 20 parts by weight, 0.5 parts by weight of DCOIT, 0.1 parts by weight of DCP, and 79.4 parts by weight of liquid paraffin.

[0101] 2) After the casting solution obtained in step (1) passes through a filter to remove impurities, it is sent into the outer cavity of the die head of the hollow fiber membrane by the extruder, and the core with a pressure of 0.1MPa is used to hydraulically inject the core with a temperature of 170°C into the cavity. In the inner cavity of the die for...

Embodiment 2

[0103] 1) Add polypropylene J1300 type (Beijing Yanshan Petrochemical Co., Ltd.), carbendazim (Ningbo Sinochem Chemical Co., Ltd.), BPO (Jiangsu Taizhou Yuanda Chemical Raw Materials Co., Ltd.) to castor oil (Xinji City Hongyun Vegetable Oil Factory) ) and mix and stir evenly, gradually raise the temperature to 220°C under the condition of nitrogen protection, continue to stir for 1 hour to obtain the casting solution, and then keep it warm for 1.5 hours for defoaming; wherein: per 100 parts by weight of the casting solution Contains 15 parts by weight of polypropylene, 1 part by weight of carbendazim, 0.2 parts by weight of BPO, and 83.8 parts by weight of castor oil.

[0104] 2) After filtering the casting solution prepared in step (1) to remove impurities, press nitrogen with a pressure of 0.14MPa into the outer cavity of the hollow fiber membrane, and use nitrogen with a pressure of 0.12MPa to pressurize the core at a temperature of 200°C. Hydraulic pressure is injected in...

Embodiment 3

[0106] 1) Ultra-high molecular weight polyethylene M II type (Beijing Auxiliary No. 2 Factory), chlorothalonil (Yunnan Chemical Plant), nano-zeolite zinc-loaded antibacterial agent (Haier Kehua Company), DCP (Sunshine International Industry Group Co., Ltd.) Add diphenyl ether (Alfa Aisha (Tianjin) Chemical Co., Ltd.) and mix evenly, put it into a twin-screw extruder to extrude at 210°C, and maintain a vacuum of -0.09MPa during extrusion; where: each 100 parts by weight of casting solution contains 25 parts by weight of ultra-high molecular weight polyethylene, 5 parts by weight of chlorothalonil, 1 part by weight of nano-zeolite zinc-loaded antibacterial agent, 0.5 parts by weight of DCP, and 68.5 parts by weight of diphenyl ether.

[0107] 2) After the casting solution obtained in step (1) passes through the filter to remove impurities, it is sent into the salivating film die by the extruder. The temperature of the die is 210°C. It is shaped into a hollow fiber membrane in a ...

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Abstract

The invention discloses an antibacterial polyolefin microfiltration membrane and a preparation method thereof; organic antiseptics are grafted on an antibacterial polyolefin microfiltration membrane which is prepared by a thermal phase separation method; grafting reaction is carried out before phase transition of the organic antiseptics by adding the organic antiseptics and grafting initiators incasting mould liquid, the organic antiseptics are grafted on polyolefin material or the organic antiseptics and grafting initiators are added for carrying out the grafting reaction when phase transition is carried out on the casting mould liquid, so as to lead the organic antiseptics to be grafted on the polyolefin. The microfiltration membrane has reliable antibacterial property, the antimicrobial spectrum is wide, antimicrobial useful life is long, the microfiltration membrane has no toxic and side effects, no special equipment is needed to be added in the method, and the original characteristics of the microfiltration membrane are not changed.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to an antibacterial polyolefin microfiltration membrane and a preparation method thereof. Background technique [0002] Ultrafiltration membranes and microfiltration membranes account for 50-60% of the entire membrane market share in the United States, Japan, and Europe, and are widely used in the separation and refinement of chemical processes, wastewater purification and recovery of useful components, zero discharge of industrial wastewater, seawater desalination, etc. . The filter membrane is mainly made of polysulfone (PS), polyacrylonitrile (PAN), polyethersulfone (PES), polyvinylidene fluoride (PVDF), polyvinyl chloride (PVC) and other polymer materials that can be dissolved in polar solvents. Prepared by solution phase separation. At present, the most widely used materials in the field of polymer materials are polyethylene (PE), polypropylene (PP) an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/26B01D67/00
Inventor 叶钢李兰吴杰刘必前
Owner 盐城海普润科技股份有限公司