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Silane coupling agent-modified hydrophilic PES/GO (polyether sulfone/graphene oxide) composite film and preparation method for same

A technology of silane coupling agent and composite membrane, which is applied in general water supply saving, chemical instruments and methods, permeation/dialysis water/sewage treatment, etc., can solve the problem that PES membrane is easy to be polluted by hydrophobic substances, and improve hydrophilicity Excellent performance in sex and anti-pollution performance, improvement of permeability, and strong reusability

Inactive Publication Date: 2015-08-19
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hydrophilic PES / GO composite membrane modified by a silane coupling agent and a preparation method thereof. The PES / GO composite membrane modified by the silane coupling agent KH570 has improved hydrophilic performance and anti-pollution performance. Greatly improved, it can be used for seawater treatment, brackish water desalination, water filtration and purification, etc., to improve water quality, and effectively solve the problem that PES membranes are easily polluted by hydrophobic substances, further expanding the application prospects of PES membranes

Method used

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  • Silane coupling agent-modified hydrophilic PES/GO (polyether sulfone/graphene oxide) composite film and preparation method for same
  • Silane coupling agent-modified hydrophilic PES/GO (polyether sulfone/graphene oxide) composite film and preparation method for same
  • Silane coupling agent-modified hydrophilic PES/GO (polyether sulfone/graphene oxide) composite film and preparation method for same

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Experimental program
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Effect test

Embodiment 1

[0025] (1) Add 0.3g of graphene oxide GO powder into 30mL of dimethylformamide, ultrasonicate at 200W for 2h; add 7.40g of polyethersulfone PES and 0.5g of pore-forming agent PVP, and stir at 50°C for 20h to obtain a uniform Casting solution; after cooling, defoaming, and scraping, put it into a deionized water coagulation bath at 70°C, remove the solvent, wash it with deionized water, and dry it naturally to obtain a polyethersulfone PES / graphene oxide GO composite membrane.

[0026] (2) Cut out a 3cm×3cm PES / GO composite membrane, place it in a 10% ethanol solution of KH570, stir it magnetically for 4 hours, then wash and dry it.

Embodiment 2

[0028] (1) Add 0.3g of graphene oxide GO powder into 30mL of dimethylformamide, ultrasonicate at 200W for 2h; add 7.40g of polyethersulfone PES and 0.5g of pore-forming agent PVP, and stir at 50°C for 20h to obtain a uniform Casting solution; after cooling, defoaming, and scraping, put it into a deionized water coagulation bath at 70°C, remove the solvent, wash it with deionized water, and dry it naturally to obtain a polyethersulfone PES / graphene oxide GO composite membrane.

[0029] (2) Cut out a 3cm×3cm PES / GO composite membrane, place it in a 10% ethanol solution of KH570, stir it magnetically for 6 hours, then wash and dry it.

Embodiment 3

[0031] (1) Add 0.3g of graphene oxide GO powder into 30mL of dimethylformamide, ultrasonicate at 200W for 2h; add 7.40g of polyethersulfone PES and 0.5g of pore-forming agent PVP, and stir at 50°C for 20h to obtain a uniform Casting solution; after cooling, defoaming, and scraping, put it into a deionized water coagulation bath at 70°C, remove the solvent, wash it with deionized water, and dry it naturally to obtain a polyethersulfone PES / graphene oxide GO composite membrane.

[0032] (2) Cut out a 3cm×3cm PES / GO composite membrane, place it in a 10% ethanol solution of KH570, stir it magnetically for 8 hours, then wash and dry it.

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Abstract

The invention discloses a silane coupling agent-modified hydrophilic PES / GO (polyether sulfone / graphene oxide) composite film and a preparation method for the same. A PES / GO composite film is prepared from the following raw materials in percentage by weight by virtue of an immersion precipitation phase-inversion method: 15 to 19.9 percent of PES, 0.1 to 5 percent of GO, 1.5 percent of a pore-forming agent and 78.5 percent of dimethylformamide. The preparation method comprises the following steps of placing the PES / GO composite film in an alcohol solution of a silane coupling agent KH570, and performing magnetic stirring, water washing and drying treatment to obtain the silane coupling agent-modified hydrophilic PES / GO composite film. The hydrophilicity and the pollution resistance of the PES / GO composite film modified by the silane coupling KH570 are greatly improved, the modified PES / GO composite film can be used for seawater treatment, brackish water desalination, water filtration purification and the like to improve the quality of water, the problem that a PES film is easily polluted by a hydrophobic matter is effectively solved, and the application prospect of the PES film is further broadened. In addition, the preparation method is simple in operating process and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of separation membrane modification, and in particular relates to a hydrophilic PES / GO composite membrane modified by a silane coupling agent and a preparation method thereof. Background technique [0002] As a thermoplastic polymer material, polyethersulfone PES has good heat resistance, hydrolysis resistance, excellent physical and mechanical properties, insulation performance and chemical resistance, and the biocompatibility of polyethersulfone is also good. , PES has become a very important kind of separation membrane material due to its excellent comprehensive performance, and is often used to manufacture nanofiltration, ultrafiltration, microfiltration, gas separation, hemodialysis membranes, etc. However, PES is a weakly polar material with strong hydrophobicity. There are two key problems when it is used for water medium treatment: one is that the hydrophobicity of the membrane makes the membrane pen...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D69/12B01D69/02B01D67/00C02F1/44
CPCY02A20/131
Inventor 李建华王双双张德彬闫邦锋张其清
Owner FUZHOU UNIVERSITY
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