Preparing method of organic-inorganic compound microfiltration membrane

An inorganic composite and microfiltration membrane technology, which is applied in the field of microfiltration membranes, can solve the problems of high temperature resistance and thermal instability of polymer microfiltration membranes, and achieve improved mechanical strength, good oxidation resistance and thermal stability, The effect of excellent temperature resistance

Inactive Publication Date: 2019-08-13
杨开芳
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method for preparing an organic-inorganic composite microfiltration membrane in view of the problems that the existing polymer microfiltration membrane is unstable when exposed to heat and is not resistant to high temperature

Method used

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Embodiment Construction

[0031] Put 5% coniferous wood pulp in a high-consistency disc refiner, and beat 6-8 times under the condition of a distance of 0.02-0.05mm to obtain a nano-cellulose slurry, and place the nano-cellulose slurry in an oven. Dry at 80-100°C for 4-6 hours to obtain nanocellulose, and weigh 40-60 parts of nano-cellulose, 0.1-0.3 parts of tetramethylpiperidine nitrogen oxide, 1-3 Sodium bromide, 12~18 parts of sodium hypochlorite solution with a mass concentration of 10%, 120~180 parts of deionized water, 60~90 parts of absolute ethanol, adding nanocellulose to deionized water, at room temperature at 400~480r / min Stir at a rotating speed for 20~30min, and then in an ultrasonic disperser, ultrasonically disperse for 10~15min under the condition of 400~500W to obtain a nanocellulose dispersion, add tetramethylpiperidine nitrogen oxide and sodium bromide to the nanocellulose In the dispersion liquid, stir at a speed of 200-300r / min for 10-20min at room temperature to obtain a mixed dis...

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Abstract

The invention relates to a preparing method of an organic-inorganic compound microfiltration membrane, and belongs to the technical field of microfiltration membranes. According to the preparing method, the organic-inorganic compound microfiltration membrane is prepared from bisphenol-A-type polysulfone resin, oxidized nano-cellulose and nano-titania. The vitrification temperature of the bisphenol-A-type polysulfone resin is 190 DEG C, and a porous membrane prepared from the bisphenol-A-type polysulfone resin can be used for a long period in an environment of 80 DEG C; modification treatment of cellulose mainly involves the steps of carrying out esterification, etherification, halogenation and oxidation reactions by utilizing three hydroxyl groups on each glucosyl group ring in a cellulosemolecule, meanwhile, grafting copolymerization and cross-linking reactions can also be carried out, and thus the adsorptivity of the cellulose is improved. The microfiltration membrane prepared by compounding the oxidized cellulose, the nano-titania and the polysulfone resin has good adsorptivity and high-temperature resistance.

Description

technical field [0001] The invention relates to a preparation method of an organic-inorganic composite microfiltration membrane, belonging to the technical field of microfiltration membranes. Background technique [0002] Microfiltration is mainly used to intercept particles, bacteria and other pollutants from gas and liquid suspensions to achieve purification, separation and concentration. In the current tertiary oil recovery technology, with the increase of oilfield produced water, the harm to the environment is also increasing, especially to low permeability or ultra-low permeability reservoirs. Therefore, the treatment of oilfield produced water has become an important factor restricting oilfield development. In order to fully develop and utilize the oilfield and protect the environment, the produced water must be discharged or reinjected up to the standard. The use of microfiltration membranes to treat oilfield produced water has been successfully experienced, but the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/14B01D69/12B01D71/68B01D67/00B01D65/10C08B15/02
CPCB01D61/147B01D65/10B01D69/12B01D69/125B01D71/68B01D2321/168B01D2321/2075B01D2323/30B01D2325/22C08B15/02
Inventor 陈莉莉
Owner 杨开芳
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