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Preparation method for super-hydrophilic ultrafiltration membrane with photocatalytic performance

An ultra-filtration membrane and super-hydrophilic technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve the problem of low TiO content and water in ultrafiltration membranes Insufficient flux, small water contact angle on the membrane surface, etc., to achieve the effect of increasing anti-pollution, improving water flux, and improving water flux

Active Publication Date: 2018-06-15
VONTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this preparation technology is that only the surface of the ultrafiltration membrane is modified with a titanium dioxide precursor solution, and no treatment is done in the basement membrane, so the filtration flux is small and the effect is not good.
However, Li Xiaoyu and others studied the modification of titanium dioxide on ultrafiltration membranes, and proposed a nano-TiO 2 A method for preparing a modified PVDF ultrafiltration membrane, but the surface of the membrane is not grafted with a hydrophilic functional layer, resulting in a small water contact angle on the membrane surface and poor hydrophilicity, and due to the limitation of nano-TiO 2 The agglomeration phenomenon of TiO in the ultrafiltration membrane 2 Less content, insufficient water flux

Method used

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  • Preparation method for super-hydrophilic ultrafiltration membrane with photocatalytic performance
  • Preparation method for super-hydrophilic ultrafiltration membrane with photocatalytic performance

Examples

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Effect test

Embodiment 1

[0024] A preparation method of an ultra-hydrophilic ultrafiltration membrane with photocatalytic properties, comprising the following steps:

[0025] (1) Preparation of TiO 2 Sol solution: Add tetrabutyl titanate and glacial acetic acid to N,N-dimethylacetamide to obtain mixed solution a; add deionized water and concentrated hydrochloric acid with a mass concentration of 36% to N,N-dimethylacetamide In acetamide, a mixed solution b is obtained; under the condition of ultrasonic vibration of the mixed solution a, the mixed solution b is added to the mixed solution a, and the pH is adjusted to 4 with concentrated hydrochloric acid with a mass concentration of 36%, to obtain TiO 2 sol solution, and keep TiO 2 The sol solution is in a state of ultrasonic vibration and is ready for use; among them, the tetrabutyl titanate, glacial acetic acid, and N,N-dimethylacetamide in the mixed solution a are mixed at a volume ratio of 30:1:50, and the mixed solution b is mixed with Deionized...

Embodiment 2

[0030] A preparation method of an ultra-hydrophilic ultrafiltration membrane with photocatalytic properties, comprising the following steps:

[0031] (1) Preparation of TiO 2 Sol solution: Add tetrabutyl titanate and glacial acetic acid to N,N-dimethylacetamide to obtain mixed solution a; add deionized water and concentrated hydrochloric acid with a mass concentration of 36% to N,N-dimethylacetamide In acetamide, a mixed solution b is obtained; under the condition of ultrasonic vibration of the mixed solution a, the mixed solution b is added to the mixed solution a, and the pH is adjusted to 4 with concentrated hydrochloric acid with a mass concentration of 36%, to obtain TiO 2 sol solution, and keep TiO 2 The sol solution is in a state of ultrasonic vibration and is ready for use; among them, the tetrabutyl titanate, glacial acetic acid, and N,N-dimethylacetamide in the mixed solution a are mixed at a volume ratio of 30:1:50, and the mixed solution b is mixed with Deionized...

Embodiment 3

[0036] A preparation method of an ultra-hydrophilic ultrafiltration membrane with photocatalytic properties, comprising the following steps:

[0037] (1) Preparation of TiO 2 Sol solution: Add tetrabutyl titanate and glacial acetic acid to N,N-dimethylacetamide to obtain mixed solution a; add deionized water and concentrated hydrochloric acid with a mass concentration of 36% to N,N-dimethylacetamide In acetamide, a mixed solution b is obtained; under the condition of ultrasonic vibration of the mixed solution a, the mixed solution b is added to the mixed solution a, and the pH is adjusted to 4 with concentrated hydrochloric acid with a mass concentration of 36%, to obtain TiO 2 sol solution, and keep TiO 2 The sol solution is in a state of ultrasonic vibration and is ready for use; among them, the tetrabutyl titanate, glacial acetic acid, and N,N-dimethylacetamide in the mixed solution a are mixed at a volume ratio of 30:1:50, and the mixed solution b is mixed with Deionized...

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Abstract

The invention relates to the technical field of modification of ultrafiltration membranes, and in particular relates to a preparation method for a super-hydrophilic ultrafiltration membrane with photocatalytic performance. According to the method provided by the invention, TiO2 is added into a base membrane through the manner of blending, and a TiO2 functional layer is crosslinked on the surface of the base membrane, so that hydrophilicity of the interior of the ultrafiltration membrane is increased, the overall water flux is improved, and the ultrafiltration membrane has good hydrophilicity,pollution resistance and photocatalytic functions on the surface; and in addition, ultrasonic treatment is adopted, so that TiO2 nanoparticles can be uniformly dispersed in the ultrafiltration membrane, and a stable rejection ratio can be maintained under high-water-flux conditions.

Description

technical field [0001] The invention relates to the technical field of ultrafiltration membrane modification, in particular to a method for preparing an ultra-hydrophilic ultrafiltration membrane with photocatalytic performance. Background technique [0002] Ultrafiltration is a sieving process driven by pressure difference, which can sieve macromolecular substances in the solution, such as suspended solids, some natural organic substances, etc., and realize the separation of solute and water, so as to achieve the purpose of purification, purification, concentration, etc. It is a very potential membrane separation technology. However, during use, the separated pollutants are easily adsorbed on the surface of the membrane, forming a filter cake or blocking the membrane pores, causing membrane fouling, resulting in a decrease in flux and an increase in energy consumption. Therefore, membrane fouling is one of the problems that restrict the large-scale industrial application o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02B01D69/10B01D71/68B01J31/38
CPCB01D67/0079B01D69/02B01D71/68B01J31/38B01D2323/02B01D2325/36B01D69/1071
Inventor 彭义波杨兴胜赵志宁梁松苗
Owner VONTRON TECH CO LTD
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