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

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

Active Publication Date: 2015-12-30
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 by hydration reaction with the surface of the substrate and gradually solidified to form a silicon hydrophilic layer, 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 film and preparation method thereof
  • Organic/inorganic hybrid hydrophilic modified hollow fiber polymer film and preparation method thereof
  • Organic/inorganic hybrid hydrophilic modified hollow fiber polymer film 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 was 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, stirred at room temperature until 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 is 10:1;

[00...

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 appears clear , 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 agent i...

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(R1 ) 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) The catalyst aqueous ammonia is dissolved in deionized wa...

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Abstract

The invention discloses an organic / inorganic hybrid hydrophilic modified hollow fiber polymer film and a preparation method thereof. According to the preparation method, a cross-linked network in which organic macromolecular chains and inorganic SiO2 nano particles are mutually crossed is generated on a porous surface of a film through the utilization of hydrolysis of a silane coupling agent and silicate ester, an organic / inorganic hybrid modified silicon layer with a micro-nano composite structure is formed on the micro-porous surface of the polymer hollow fiber film, and finally, the novel polymer hollow fiber film with super hydrophilic-underwater super lipophobicity is obtained. According to the invention, the content ratio of the silane coupling agent to the silicate ester is adjusted, so that the interface cross-linking degree of the cross-linked network of the film surface can be controlled, and further, the controllable adjustment of nano-scale micropores in the film surface can be realized. The organic / inorganic hybrid hydrophilic modified hollow fiber polymer film has long-lasting hydrophilicity, hydrophilic stability, ultrahigh water flux and ultrahigh anti-pollution performance, and can be widely applied to the fields of drinking water deep purification, industrial sewage treatment, condensation separation and oil-water separation of edible drinks, and the like.

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] With the development of human process, industries such as oil refining industry, textile industry and food industry have produced a large amount of oily wastewater. In addition, frequent oil spills from 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 wettability is undoub...

Claims

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Application Information

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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
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