Preparation and catalytic regeneration of functionalized graphene oxide/polyether sulfone blended ultrafiltration membrane

A graphene and polyethersulfone technology, which is applied in the modification of polyethersulfone ultrafiltration membrane and its catalytic regeneration field, can solve the problems of poor hydrophilicity, low flux, low cleaning and recovery efficiency, etc., and achieve enhanced pollution resistance. , simple process, low cost effect

Inactive Publication Date: 2015-04-29
DONGHUA UNIV
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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 overcome the problems of poor hydrophilicity, low flux, and low cleaning and recovery efficiency after pollution of the existing polyethersulfone ultrafiltration membrane, to modify the polyethersulfone ultrafiltration membrane, and to provide a functionalized graphene oxide Preparation and catalytic regeneration method of polyethersulfone blended ultrafiltration membrane

Method used

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  • Preparation and catalytic regeneration of functionalized graphene oxide/polyether sulfone blended ultrafiltration membrane
  • Preparation and catalytic regeneration of functionalized graphene oxide/polyether sulfone blended ultrafiltration membrane

Examples

Experimental program
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Embodiment 1

[0032] A preparation method of functionalized graphene oxide / polyethersulfone blended ultrafiltration membrane, the specific steps are:

[0033] Ultrasonic dispersion of functionalized graphene oxide and porogen polyvinylpyrrolidone in the organic solvent N,N-dimethylacetamide for 2 hours, adding polyethersulfone to the resulting dispersion, and placing it in a water bath at a constant temperature of 80°C Stir and dissolve, leave to stand for 1 hour for defoaming, and obtain the casting solution; the mass percent concentration of graphene oxide loaded with tricobalt tetroxide in the casting solution is 0%, and the mass percent concentration of polyethersulfone in the casting solution is 15%. The polyvinylpyrrolidone of polyvinylpyrrolidone is 5%;

[0034] At room temperature and ambient humidity of 50-55%, keep the temperature of the clean scraping plate, flat scraper panel and casting solution consistent, set the thickness and speed of the scraping film, and the thickness of ...

Embodiment 2-7

[0036] Similar to Example 1, the difference is that the concentration of graphene oxide loaded with tricobalt tetroxide in the casting solution in Examples 2-7 is 0.1%, 0.3%, 0.5%, 0.7%, 1.0%, and 2.0%.

[0037] The functionalized graphene oxide / polyethersulfone blended ultrafiltration membrane in Examples 1-7 was measured under 0.1MPa pressure for its pure water flux and BSA rejection rate (%), specifically as follows:

[0038]The bovine serum albumin (BSA) of 1g / L is adopted as a pollutant, and the functionalized graphene oxide / polyethersulfone blended ultrafiltration membrane in Examples 1-7 is evaluated for pollution resistance, and the test process is: at room temperature , Prepress the membrane with distilled water for 40min at 0.15MPa, then change the pressure to 0.1MPa to calculate the pure water flux by measuring the volume of pure water passing through, record the volume of pure water passing through every 5min, and the experiment time is 30min ; Then replace the ult...

Embodiment 2

[0043] The preparation method of the functionalized graphene oxide / polyethersulfone blended ultrafiltration membrane in Example 5 The catalytic regeneration method of the prepared functionalized graphene oxide / polyethersulfone blended ultrafiltration membrane, the specific steps are:

[0044] Get a piece of functionalized graphene oxide / polyethersulfone blended ultrafiltration membrane prepared in Example 5 and put it into an ultrafiltration cup, pre-press for 20min under a pressure of 0.15MPa, and test the pure water flux J at 0.1MPa 1 382.57L·m -2 h -1 Add sewage from the secondary sedimentation tank to the ultrafiltration cup for ultrafiltration operation, maintain the pressure at 0.1MPa, measure a flux data every 5 minutes, and continue to run for 6 hours. At this time, the ultrafiltration membrane has a certain degree of pollution, and then use distilled water The pure water flux of the test membrane is denoted as J 2 141.29L·m -2 h -1 ;Use a damp sponge to wipe off t...

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Abstract

The invention provides preparation and catalytic regeneration of a functionalized graphene oxide/polyether sulfone blended ultrafiltration membrane. The preparation method of the functionalized graphene oxide/polyether sulfone blended ultrafiltration membrane is characterized by comprising the following specific steps: dispersing cobaltosic oxide-loaded graphene oxide and a pore-foaming agent into an organic solvent with an ultrasonic wave; adding polyether sulfone to a dispersion liquid, and stirring and dissolving at 75-85 DEG C; standing and defoaming to obtain a casting liquid; scraping the casting liquid at room temperature when the environment humidity is 50%-55% to prepare a liquid membrane; and putting into a water bath at 10-25 DEG C, after the membrane falls off, taking out the membrane, washing, soaking, freezing and drying to obtain the functionalized graphene oxide/polyether sulfone blended ultrafiltration membrane.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, and in particular relates to a modification of a polyethersulfone ultrafiltration membrane and a catalytic regeneration method thereof. Background technique [0002] There are many materials for preparing 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 up to now. Non-cellulose acetate ultrafiltration membrane materials include polysulfone, polyethersulfone, polycarbonate, polyvinyl chloride, polyimide, polytetrafluoroethylene, polyvinylidene fluoride, and polymer electrolytes. [0003] Polyethersulfone (PES) is a thermoplastic polymer material developed in the 1970s. It has good chemical stability, high temperature resistance, strong acid and alkali resistance, oxidation resistance and solvent resistance. It has been wid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D67/00B01D65/02
Inventor 李登新欧阳赣李洁冰李玉龙周红中段元东吕伟蔡文倍王瑾纪豪史振涛高扶朋陈齐郭士林王永乐曹海军王君
Owner DONGHUA UNIV
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