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Non-woven fabric substrate supported polyethylene nanofiltration membrane

A polyethylene microporous membrane and non-woven technology, applied in the field of nanofiltration membranes, can solve problems such as poor pressure resistance, and achieve the effects of improving service life, improving pure water permeability and considerable economic benefits.

Inactive Publication Date: 2020-09-08
SHANGHAI ENERGY NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thinness of the polyethylene material also has its defects, that is, the mechanical strength, especially the compressive performance is poor.

Method used

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  • Non-woven fabric substrate supported polyethylene nanofiltration membrane
  • Non-woven fabric substrate supported polyethylene nanofiltration membrane
  • Non-woven fabric substrate supported polyethylene nanofiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The polyethylene microporous membrane 2 (thickness 9 μm, average pore diameter 0.046 μm) was soaked with 50% isopropanol solution by mass fraction, and then washed with deionized water. Immediately placed on the polyethylene terephthalate non-woven substrate 3 (thickness 90 μm, mass per unit area 76g / m 2 ) on, flatten and fix.

[0063] Immerse the non-woven fabric-supported polyethylene microporous membrane in the polyamine aqueous phase solution, wherein the polyfunctional amine monomer is piperazine (mass concentration 3%), the acid acceptor is triethylamine (mass concentration 0.5%), and the single The body diffusion accelerator is sodium lauryl sulfate (mass concentration 0.1%), and the immersion time is 30 seconds; the film is taken out from the water phase, the excess liquid is removed, and then immersed in the oil phase solution of polyacyl chloride, wherein the monomer of polyacyl chloride is homophenyl Triformyl chloride (mass concentration 0.1%), the solvent ...

Embodiment 2

[0065] The above-mentioned polyethylene microporous membrane 2 is replaced with a thickness of 5 μm, and the average pore diameter is 0.051 μm, and the polyethylene terephthalate nonwoven substrate 3 is loaded with a thickness of 70 μm, and other conditions are the same as in Example 1. A polyethylene nanofiltration membrane is supported on a textile substrate.

Embodiment 3

[0067] A polyethylene terephthalate non-woven fabric substrate 3 with a thickness of 100 μm was used for loading, and other conditions were the same as in Example 1 to obtain a polyethylene nanofiltration membrane supported by a non-woven fabric substrate.

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Abstract

The invention discloses a non-woven fabric substrate supported polyethylene nanofiltration membrane. The nanofiltration membrane comprises a non-woven fabric substrate, a polyethylene microporous membrane and a nanofiltration membrane skin layer, wherein the polyethylene microporous membrane is supported on the non-woven fabric substrate to obtain a non-woven fabric supported polyethylene microporous membrane; and the nanofiltration membrane skin layer is formed on the non-woven fabric supported polyethylene microporous membrane through interfacial polymerization of a polyamine water-phase monomer and a polyacyl chloride oil-phase monomer. Compared with a polyethylene microporous nanofiltration membrane without a non-woven fabric as a substrate for supporting, the xnanofiltration membraneprovided by the invention has higher inorganic salt rejection rate, better and more stable membrane filtration performance and longer service life; and compared with an existing commercial polysulfonesubstrate nanofiltration membrane, the nanofiltration membrane has higher flux and better comprehensive performance on the basis of achieving the same level of rejection rate and service life.

Description

technical field [0001] The invention relates to the technical field of nanofiltration membranes, in particular to a polyethylene nanofiltration membrane supported by a non-woven fabric substrate. Background technique [0002] After entering the 21st century, the problems of environmental damage and resource shortage have become more prominent, among which the problem of fresh water resource shortage is very serious. Using membrane separation method to draw fresh water from rivers and lakes, underground brackish water, sea water and even sewage and waste water reuse can effectively alleviate the water resource crisis and become an important part of sustainable development in the future. Functional nanofiltration membranes can effectively reduce water hardness, turbidity, chromaticity, bacteria, fungi and other microorganisms, and can obtain high water yield under low pressure. It has been widely used in foreign industrial manufacturing and household life. [0003] In the exi...

Claims

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Application Information

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IPC IPC(8): B01D69/10B01D69/12B01D67/00B32B27/32B32B3/24B32B27/08B32B27/06B32B27/02B32B27/36B32B27/40B32B27/34B32B33/00
CPCB01D69/10B01D69/12B01D67/0002B32B27/32B32B3/266B32B27/08B32B27/06B32B5/022B32B33/00B32B2262/0292B32B2262/0276B32B2262/0253B32B2262/0261B32B2250/03
Inventor 程跃王英杰邱长泉庄志虞少波
Owner SHANGHAI ENERGY NEW MATERIALS TECH CO LTD