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Organic/inorganic hybrid hydrophilic modified hollow fiber polymer membrane and preparation method thereof

A technology of fiber polymer and hydrophilic modification, applied in the field of ultra/microfiltration hollow fiber membrane, organic/inorganic hybrid hydrophilic modified hollow fiber polymer membrane and its preparation, and hydrophilic modification of hollow fiber membrane , can solve the problems of high cost and complex composition, and achieve the effect of ultra-low transmembrane pressure, ultra-high rejection rate, and enlarged roughness

Active Publication Date: 2017-10-27
江苏巨之澜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent with the publication number CN101153126 discloses a coating material that can be coated on the surface of the substrate and gradually solidified to form a silicon hydrophilic layer by utilizing the hydration reaction with the surface of the substrate, but the composition of the material is complex and the cost is high.

Method used

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  • Organic/inorganic hybrid hydrophilic modified hollow fiber polymer membrane and preparation method thereof
  • Organic/inorganic hybrid hydrophilic modified hollow fiber polymer membrane and preparation method thereof
  • Organic/inorganic hybrid hydrophilic modified hollow fiber polymer membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A polysulfone hollow fiber gradient membrane with an average pore size of 0.9-1.2 μm, a porosity of 60%, an inner diameter of 0.4 μm, and an outer diameter of 0.6 μm is used as the hollow fiber base membrane (purchased from Nanjing Jialejing Membrane Technology Co., Ltd., model PS640);

[0050] Concrete preparation steps are as follows:

[0051] (1) Tetraethyl orthosilicate TEOS and silane coupling agent Si(R 1 ) n (R 2 ) m (where R 1 for -OCH 2 CH 3 , R 2 for -CH 2 CH 2 CH 2 -(OCH 2 CH 2 ) t -OCH 2 CH 2 OH, and n is 3, m is 1, t is 50, purchased from Yiwu Zhongying Printing and Dyeing Auxiliary Co., Ltd., the model is SC3-EO50) added to absolute ethanol for mixing, and stirred at room temperature until it was in a clear state, Obtain a modified solution; wherein, in the modified solution, the total mass percent concentration of tetraethyl orthosilicate TEOS and the silane coupling agent is 10 wt%, and the mass ratio of TEOS to the silane coupling agent i...

Embodiment 2

[0057] A polyvinylidene fluoride hollow fiber gradient membrane with an average pore size of 0.5-0.8 μm, a porosity of 40%, an inner diameter of 0.3 μm, and an outer diameter of 1.0 μm was used as the hollow fiber base membrane (purchased from Nanjing Jialejing Membrane Technology Co., Ltd., model PVDF1030 );

[0058] The specific preparation method is as follows:

[0059] (1) Tetraethyl orthosilicate TEOS and silane coupling agent Si(R 1 ) n (R 2 ) m (where R 1 for -OCH 2 CH 3 , R 2 for -CH 2 CH 2 CH 2 -(OCH 2 CH 2 ) t -OCH 2 CH 2 OH, and n is 2, m is 2, t is 150, purchased from Yiwu Zhongying Printing and Dyeing Auxiliary Co., Ltd., the model is SC2-EO150) mixed with absolute ethanol, stirred at room temperature until it is in a clear state , to obtain a modified liquid, wherein, in the modified liquid, the total mass percentage concentration of ethyl orthosilicate TEOS and the silane coupling agent is 20wt%, and the mass ratio of TEOS to the silane coupling ...

Embodiment 3

[0065] A polyethersulfone hollow fiber gradient membrane with an average pore size of 0.8-1.0 μm, a porosity of 50%, an inner diameter of 0.6 μm, and an outer diameter of 0.9 μm was used as the polymer base membrane (purchased from Nanjing Jialejing Membrane Technology Co., Ltd., model PES960) ;

[0066] (1) butyl orthosilicate and silane coupling agent Si(R 1 ) n (R 2 ) m (where R 1 for-OCH 3 , R 2 for -CH 2 CH 2 CH 2 -(OCH 2 CH 2 ) t -OCH 2 CH 2 OH, and n is 3, m is 1, t is 200, purchased from Yiwu Zhongying Printing and Dyeing Auxiliary Co., Ltd., the model is SC3-EO200) mixed with absolute ethanol, stirred at room temperature until it appears clear , to obtain the modified solution; wherein, in the modified solution, the total mass percentage concentration of butyl orthosilicate and silane coupling agent is 40wt%, and the mass ratio of butyl orthosilicate and silane coupling agent is 3:1 ;

[0067] (2) Dissolving catalyst ammonia water in deionized water to...

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Abstract

The invention discloses an organic / inorganic hybrid hydrophilic modified hollow fiber polymer membrane and a preparation method thereof. It uses the hydrolysis of silane coupling agent and silicate to generate organic polymer chains and cross-linked networks of inorganic SiO2 nanoparticles on the porous surface of the membrane, forming a micro-nano composite structure on the microporous surface of the polymer hollow fiber membrane. The organic / inorganic hybrid modified silicon layer finally obtained a new type of polymer hollow fiber membrane with superhydrophilic-underwater superoleophobic properties. By adjusting the content ratio of silane coupling agent and silicate, the interfacial crosslinking degree of the interpenetrating network on the membrane surface can be controlled, and then the controllable adjustment of the nanoscale micropores on the membrane surface can be realized. The organic / inorganic hybrid hydrophilic modified hollow fiber polymer membrane of the present invention has long-lasting hydrophilicity, hydrophilic stability, ultra-high water flux, and ultra-high anti-pollution performance, and can be widely used in deep purification of drinking water, Industrial sewage treatment, concentration and separation of edible beverages, oil-water separation and other fields.

Description

technical field [0001] The invention relates to a method for hydrophilic modification of hollow fiber membranes, in particular to an organic / inorganic hybrid hydrophilic modified hollow fiber polymer membrane and a preparation method thereof, which can obtain superhydrophilic-underwater superoleophobic properties An ultra / microfiltration hollow fiber membrane belongs to the technical field of polymer materials. Background technique [0002] Along with the development of human process, industries such as oil refining industry, textile industry, food industry all produce a large amount of oily waste water. In addition, the frequent oil spill accidents of drilling platforms and ocean-going tankers in recent years have also caused a large amount of oil to leak into seawater. Therefore, oil-water separation has become an increasingly serious problem worldwide. [0003] The essence of oil-water separation is the interface problem, and designing an interface with special wettabil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/08B01D71/34B01D71/68B01D71/30B01D71/42B01D67/00B01D61/14
Inventor 黄小军李晶高巧灵
Owner 江苏巨之澜科技有限公司