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Anti-polluting membrane material preparation method

A membrane material and anti-pollution technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as harsh reaction conditions, high energy consumption, and nanoparticle agglomeration

Active Publication Date: 2015-08-26
中津科创(厦门)膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently the most common chemically synthesized silver nanoparticles face problems such as nanoparticle agglomeration, high energy consumption, harsh reaction conditions, difficulty in large-scale production, and "poor dispersion" in the membrane matrix.
In addition, the extensive use of toxic and harmful chemical reagents will also cause serious harm to the environment

Method used

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  • Anti-polluting membrane material preparation method
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  • Anti-polluting membrane material preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 0.593 g of biological nano-silver (silver content is about 505.6 mg / g) into 79.4 g of N,N-dimethylacetamide, disperse it by stirring, then add 20 g of polyethersulfone, and put the mixture at 60 °C Dissolved in an oven, airtight and static defoaming to obtain a homogeneous casting solution. Pour a certain amount of casting solution into the trough, use a 0.2mm feeler gauge to control the thickness, use a scraper to scrape the film on the polyester non-woven support layer, and immediately enter the 25 ℃ pure water gel bath for phase inversion to form a film . The prepared membrane was placed in a pure water bath for more than 24 hours to completely remove excess organic solvent. At a pressure of 0.1 MPa, the pure water flux of this membrane is 237.5 L m -2 h -1 , the rejection rate of 1000 mg / L ovalbumin is 93.4%, the rejection rate of 1000 mg / L bovine serum albumin (BSA) is 98.6%, the molecular weight cut-off (MWCO) is 45 KDa, scanning electron microscope observ...

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Abstract

The present invention relates to an anti-polluting membrane material preparation method, which is characterized in that a macromolecule polymer is adopted as a main membrane preparing material, the polymer, an anti-polluting additive and an organic solvent are subjected to heating stirring according to a certain ratio to prepare a homogeneous membrane casting solution, complete deaeration is performed, the obtained solution is spread on a non-woven fabric by using a membrane scraping machine to control the thickness, and gel bath curing is performed to obtain the membrane. The ultra-filtration membrane prepared by using the method has characteristics of good purified water flux, good protein rejection, and excellent biological pollution resistance.

Description

technical field [0001] The invention relates to a preparation method of an anti-pollution membrane material. The membrane can be used as a microfiltration membrane or an ultrafiltration membrane for water treatment, industrial separation, drinking water purification, protein concentration and the like. Background technique [0002] Membrane separation technology is widely used, however, the decline of flux and separation performance due to membrane fouling is still the most serious problem faced by membrane technology. Generally, membrane fouling can be divided into: organic fouling, inorganic fouling, colloidal fouling and biological fouling. Among them, biofouling due to biofilm formation is considered to be the most harmful membrane pollution. Microorganisms are ubiquitous in the natural environment, and they can use limited nutrients for rapid growth and reproduction, so biological pollution is easy to occur but difficult to eliminate. Once biofouling occurs, it will c...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/68B01D71/34B01D71/26B01D71/30B01D71/16B01D71/42B01D71/64B01D67/00
Inventor 张凯松张曼莹
Owner 中津科创(厦门)膜科技有限公司