Preparation method for polyether sulfone/graphene oxide composite ultrafiltration membrane

A graphene composite and polyethersulfone technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of polyethersulfone ultrafiltration membranes, such as easy to be polluted mechanical properties, to improve mechanical strength, The effect of enhanced permeation flux and good hydrophilicity

Inactive Publication Date: 2012-08-01
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to modify the polyethersulfone ultrafiltration membrane to prepare a type of polyethersulfone/graphene oxide composite ultrafiltration

Method used

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  • Preparation method for polyether sulfone/graphene oxide composite ultrafiltration membrane
  • Preparation method for polyether sulfone/graphene oxide composite ultrafiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] Example 1

[0033] 0.5g of graphene oxide was added to 79.5g of dimethylacetamide ultrasonically dispersed for 1h to form a uniform and stable dispersion, and then 18g of polyethersulfone and 2g of polyvinylpyrrolidone were added to the dispersion, oil at 60℃ Stir in the bath for 4 hours, and then put the solution in a 60°C blast drying box to stand still and degas for 4 hours to obtain a uniformly mixed casting solution. Pour the casting liquid on the glass plate, scrape the membrane with a glass rod with copper wires at both ends, and then immerse it in a distilled water coagulation bath at room temperature. After the membrane comes off automatically, a polyethersulfone / graphene oxide composite ultrafiltration is obtained membrane.

[0034] After testing, the flux recovery rate of the obtained polyethersulfone / graphene oxide composite ultrafiltration membrane was 90%, and the BSA rejection rate remained above 95%.

Example Embodiment

[0035] Example 2

[0036] 1.0g of graphene oxide was added to 79g of dimethylacetamide ultrasonically dispersed for 1h to form a uniform and stable dispersion, and then 18g of polyethersulfone and 2g of polyvinylpyrrolidone were added to the dispersion, and the mixture was heated at 60℃ in an oil bath After stirring for 4 hours, put the solution in a 60°C blast drying box and let it stand for 4 hours to defoam to obtain a uniformly mixed casting solution. Pour the casting liquid on the glass plate, scrape the membrane with a glass rod with copper wires at both ends, and then immerse it in a distilled water coagulation bath at room temperature. After the membrane comes off automatically, a polyethersulfone / graphene oxide composite ultrafiltration is obtained membrane.

[0037] After testing, the flux recovery rate of the obtained polyethersulfone / graphene oxide composite ultrafiltration membrane was 94%, and the BSA rejection rate remained above 95%.

Example Embodiment

[0038] Example 3

[0039] Add 2g of graphene oxide to 78g of dimethylacetamide ultrasonically disperse for 1h to form a uniform and stable dispersion, then add 18g of polyethersulfone and 2g of polyvinylpyrrolidone to the dispersion, in an oil bath at 60℃ Stir for 4 hours, then put the solution in a 60°C blast drying box to stand still and degas for 4 hours to obtain a uniformly mixed casting solution. Pour the casting liquid on the glass plate, scrape the membrane with a glass rod with copper wires at both ends, and then immerse it in a distilled water coagulation bath at room temperature. After the membrane comes off automatically, a polyethersulfone / graphene oxide composite ultrafiltration is obtained membrane.

[0040] After testing, the flux recovery rate of the obtained polyethersulfone / graphene oxide composite ultrafiltration membrane was 94.5%, and the BSA rejection rate remained above 95%.

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Abstract

The invention discloses a preparation method for a polyether sulfone/graphene oxide composite ultrafiltration membrane. The preparation method comprises the following steps of ultrasonically dispersing the graphene oxide into an organic solvent to form uniform and stable dispersing liquid; adding polyether sulfone and additive into the dispersing liquid; stirring, dissolving, standing and defoaming to form uniform and stable casting membrane liquid; pouring the casting membrane liquid on a glass plate; scraping the membrane; and immersing into coagulating bath at room temperature to obtain the polyether sulfone/graphene oxide composite ultrafiltration membrane after the membrane is removed automatically, wherein the casting membrane liquid comprises the following components as per mass percentage concentration: 15 to 21 percent of polyether sulfone, 1 to 2 percent of pore-forming agent and 0.5 to 4.0 percent of graphene oxide. The polyether sulfone/graphene oxide composite ultrafiltration membrane has high hydrophilcity, high porosity, static resistance, elasticity and the like and improves the flux of pure water, retention rate, pollution resistance, mechanical property and the like.

Description

technical field [0001] The invention relates to a modification method of a polyethersulfone ultrafiltration membrane, in particular to a preparation method of a polyethersulfone / graphene oxide composite ultrafiltration membrane. Background technique [0002] There are many materials for making ultrafiltration membranes, and the early ultrafiltration membranes were made of cellulose acetate. This material is low in price and has good film-forming properties, and it still has important uses today. Non-cellulose acetate ultrafiltration membrane materials include polysulfone, polyethersulfone, polyacrylonitrile, polycarbonate, aromatic polyamide, polyimide, polytetrafluoroethylene, polyvinylidene fluoride, and polymer electrolyte complexes, etc. . [0003] Polyethersulfone ultrafiltration membrane has properties such as high temperature resistance, aging resistance, creep resistance, dimensional stability, and chemical resistance. However, due to its strong hydrophobicity, it ...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D67/00
Inventor 王宗花赵凯迟德玲夏建飞张菲菲李峰于海容
Owner QINGDAO UNIV
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