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Pollution-resistant modified porous membrane and preparation method thereof

A porous membrane and pollution-resistant technology, which is applied in the field of membrane separation, can solve the problems of pollution resistance and difficult chemical graft modification, and achieve the effects of avoiding the problem of clogging membrane pores, mild reaction conditions and simple reaction process

Inactive Publication Date: 2020-09-15
天津海龙津阳材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Currently commonly used organic porous membrane materials are: polyvinylidene fluoride, polyvinyl chloride, polysulfone, polyethersulfone, cellulose acetate, nylon, polytetrafluoroethylene, polyethylene, polypropylene, etc., the common problem currently exists is that The pollution resistance of the surface of the membrane material needs to be further improved, and the surface is not easy to be modified by chemical grafting

Method used

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  • Pollution-resistant modified porous membrane and preparation method thereof
  • Pollution-resistant modified porous membrane and preparation method thereof
  • Pollution-resistant modified porous membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] After heating and mixing 1 kg of vinylidene fluoride-chlorotrifluoroethylene copolymer, 1.8 kg of dioctyl phthalate, and 200 g of glucosamine at 210 degrees for 1 hour, extrude to prepare hollow Fibrous porous membrane. The inner diameter of the porous membrane is 0.8mm. Wall thickness 0.2mm, membrane pure water flux 810L / m 2 .h@bar, the water contact angle on the membrane surface is 61 degrees.

Embodiment 2

[0048] The vinylidene fluoride-chlorotrifluoroethylene copolymer porous membrane prepared in Comparative Example 1 was immersed in an aqueous meglumine solution with a concentration of 2mol / L and a temperature of 80 degrees for 8 hours, and was taken out for washing. Membrane pure water flux 730L / m 2 .h@bar, the membrane surface water contact angle is 58 degrees.

Embodiment 3

[0050] 1 kg of polyvinyl chloride, 2.2 kg of dimethylacetamide, 800 g of polyethylene glycol 6000, and 200 g of glucosamine were mixed and dissolved at 70 degrees for 10 hours, and a hollow Fibrous porous membrane. The inner diameter of the porous membrane is 0.8mm. Wall thickness 0.2mm, membrane pure water flux 640L / m 2 .h@bar, the membrane surface water contact angle is 49 degrees.

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Abstract

The invention relates to a preparation method of a pollution-resistant modified porous membrane, which utilizes C-Cl bonds in a vinylidene fluoride-chlorotrifluoroethylene copolymer and polyvinyl chloride polymer molecules to react with micromolecular monoamino hydrophilic compounds to realize functionalization of a membrane material so as to improve the pollution resistance and blood compatibility of the porous membrane. The method is simple in grafting reaction process, mild in reaction condition and easy to implement. Chemical grafting modification is adopted, the formed modified material cannot fall off from the membrane material, meanwhile, the problem that membrane holes are blocked due to conventional grafted macromolecules can be avoided, the membrane flux is not reduced, and the negatively charged or electrically neutral anti-pollution and high-blood-compatibility porous membrane can be obtained.

Description

technical field [0001] The invention relates to the membrane separation field, and relates to membrane modification technology, in particular to a pollution-resistant modified porous membrane and a preparation method thereof. Background technique [0002] The membrane separation process is usually carried out at room temperature. It is a high-efficiency and energy-saving separation and purification technology. It has been widely used in many industrial fields such as water purification and sewage resource treatment, chemical and pharmaceutical material separation and purification, water purification, air purification, etc. The field of people's livelihood. Membrane separation technology represented by organic separation membrane, as a new type of chemical fluid separation unit operation technology, plays an important role as a basic common technology in environmental protection, traditional industrial production process technology improvement and other aspects. [0003] Cur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02
CPCB01D67/0093B01D69/02
Inventor 吕剑阳
Owner 天津海龙津阳材料科技有限公司
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