Organic-inorganic composite nanoparticle super-hydrophilic modified polymer film and preparation method therefor

A polymer membrane and inorganic composite technology, applied in the field of membrane separation, can solve the problems of uncontrollable SiO2 particle size and uniformity, hydrophilic performance limitation, etc., to achieve the effect of reducing water penetration resistance and improving anti-pollution ability

Active Publication Date: 2015-11-04
江苏巨之澜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method achieves SiO 2 The effect of uniform dispersion of particles, but the SiO cannot be controlled 2 The size and uniformity of the particle size have great limitations on the improvement of the hydrophilic performance of the membrane

Method used

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  • Organic-inorganic composite nanoparticle super-hydrophilic modified polymer film and preparation method therefor
  • Organic-inorganic composite nanoparticle super-hydrophilic modified polymer film and preparation method therefor
  • Organic-inorganic composite nanoparticle super-hydrophilic modified polymer film and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Step ⑴. With 12% of polyvinylidene fluoride, 9% of PEG200, 2% of methyl orthosilicate, 0.01% of No. KH550 silane coupling agent, 0.1% of acetic acid, organosilicon hydrophilic modifier A (structural formula I, R is Methyl, n=1) 0.5%, N,N-dimethylformamide 76.49% was added to the container, stirred and dissolved, and stirred at 40°C for 8 hours to obtain a uniformly stirred casting solution;

[0063] Step ⑵. Put the uniformly stirred casting solution at 40°C for 12 hours to defoam;

[0064] Step ⑶. The air bath through which the defoamed casting solution passes is 0cm, and spinning is carried out at 500kPa. The outer gel solution is water and the temperature is 35°C. The core liquid is water and the temperature is 30°C. Wet spinning produces spun fibers.

[0065] Step ⑷. Rinse in pure water for 24 hours, take it out and dry it in the air to prepare an organic-inorganic composite nanoparticle superhydrophilic modified polymer film.

[0066]The porosity of the finally ob...

Embodiment 2

[0068] Step ⑴. Polysulfone 15.5%, PEG6002%, tetraethyl orthosilicate 8%, No. KH560 silane coupling agent 0.3%, oxalic acid 0.2%, organosilicon hydrophilic modifier B (structural formula Ⅰ, R is ethyl, n=10) 1.5%, N,N-dimethylacetamide 72.5% were added to the container, stirred and dissolved, and stirred at 55°C for 14 hours to obtain a uniformly stirred casting solution;

[0069] Step ⑵. Put the uniformly stirred casting solution at 55°C for 15 hours to defoam;

[0070] Step ⑶. The air bath through which the defoamed casting solution passes is 2cm, and spinning is carried out at 700kPa. The outer gel solution is a mixture of N,N-dimethylacetamide and water, and the mixing ratio is 1:2 , the temperature is 38°C, the core liquid is a mixture of N,N-dimethylacetamide and water, the mixing ratio is 1:2 and the temperature is 35°C, and the primary fiber is obtained by dry-wet spinning.

[0071] Step ⑷. Rinse in pure water for 36 hours, take it out and dry it in the air to prepare ...

Embodiment 3

[0074] Step (1) with polyethersulfone 15%, PEG800 3%, tetrabutyl orthosilicate 10%, No. KH570 silane coupling agent 0.9%, benzoic acid 0.3%, organosilicon hydrophilic modifier C (structural formula II, R For methyl, n=30) 2%, N-methylpyrrolidone 68.8% was added to the container, stirred and dissolved, and stirred at 60°C for 17 hours to obtain a uniformly stirred casting solution;

[0075] Step ⑵. Put the uniformly stirred casting solution at 60°C for 17 hours to defoam;

[0076] Step (3). The air bath through which the defoamed casting liquid passes is 3 cm, and spinning is carried out at 1.3 MPa. The outer gel liquid is a mixture of N-methylpyrrolidone and water, the mixing ratio is 3:4, and the temperature is 40°C, the core liquid is a mixture of N-methylpyrrolidone and water, the mixing ratio is 3:5, the temperature is 40°C, and the primary fiber is obtained by dry-wet spinning.

[0077] Step ⑷. Rinse in pure water for 36 hours, take it out and dry it in the air to prepar...

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Abstract

The invention relates to the technology of film separation, and aims to provide an organic-inorganic composite nanoparticle super-hydrophilic modified polymer film and a preparation method therefor. The polymer film contains a super-hydrophilic polyester modified organic silicon material, organic-inorganic composite nanoparticles are uniformly distributed on the cross section, outer surface layer and inner surface layer of the polymer film, and the polymer film is of a gradient micro-nano beaded network structure; and the super-hydrophilic polyester modified organic silicon material contains Si-C bond joint type super-hydrophilic polyether functional group. The polymer film can realize water increment speed difference at different components, and thus the organic-inorganic composite nanoparticle super-hydrophilic modified polymer film of a gradient pore structure is prepared. The polymer film can realize accurate control for the polymer film pore structure, and meets diversified using environments. The polymer film has the advantages of super hydrophily, excellent hydrophilic durability, ultra-low pressure or zero over-film pressure ultrahigh water flux and ultrahigh antipollution performance, and can be widely applied to drinking water deep purification, industrial sewage treatment, edible drink concentration separation and oil-water separation.

Description

technical field [0001] The invention relates to a method for preparing an organic-inorganic composite nanoparticle superhydrophilic modified polymer membrane, which belongs to the technical field of membrane separation. Background technique [0002] With the improvement of people's living standards, water pollution, water shortage and water quality problems have become the focus of attention. As a new and efficient separation technology, membrane separation technology has the advantages of no phase change, no secondary pollution, high separation efficiency and small footprint compared with traditional separation technology, so it is widely used in chemical industry, papermaking, food , agriculture, textile, printing and dyeing, medicine and water treatment and other industries. [0003] Generally, inorganic membranes have good chemical stability, acid and alkali resistance and organic solvent resistance, high mechanical strength, high temperature resistance, and easy cleani...

Claims

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Application Information

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IPC IPC(8): B01D71/70B01D69/02B01D67/00
Inventor 黄小军李晶高巧灵
Owner 江苏巨之澜科技有限公司
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