Polyphenylene sulfide/porous carbon nanofiber composite membrane and preparation method thereof

A kind of nanofiber, polyphenylene sulfide technology

Active Publication Date: 2021-02-09
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional PPS membrane is a microporous membrane, the film-forming process is difficult to control, the large and irregular pore structure and poor hydrophilicity are not conducive to the filtration and separation of small molecular compounds such as dyes and drugs; Chinese patent CN108745007A discloses "a polyphenylene sulfide Preparation method of ether sulfone / polyphenylene sulfide composite membrane", treating the polyphenylene sulfide membrane with an oxidant to obtain a polyphenylene sulfone / polyphenylene sulfide composite membrane, which improves the hydrophilicity of the membrane

Method used

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  • Polyphenylene sulfide/porous carbon nanofiber composite membrane and preparation method thereof
  • Polyphenylene sulfide/porous carbon nanofiber composite membrane and preparation method thereof
  • Polyphenylene sulfide/porous carbon nanofiber composite membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) 40g of biphenyl and 10g of dimethyl phthalate are mixed, placed in a reactor, heated to form a transparent solution, 10g of nitrated porous carbon nanofibers are added to the reactor, and filled with 50 ℃ hot water Mechanical agitation was performed in an ultrasonic cleaner to form a homogeneous solution.

[0029] (2) Add 40 g of polyphenylene sulfide resin into the reactor, blow in nitrogen to remove the air, raise the temperature to 150°C while continuously performing mechanical stirring to obtain a homogeneous casting solution, and then let it stand for defoaming.

[0030] (3) Pour the casting solution evenly on the stainless steel plate, scrape it with a film scraping rod to form a polyphenylene sulfide / porous carbon nanofiber composite film, then soak it in ethanol, heat to 40°C, dissolve the diluent, and obtain a porous composite film.

[0031] The average pore size of the membrane measured by a capillary pore size tester was 0.12 μm, and the membrane rejecti...

Embodiment 2

[0033] (1) 50g of 1-chloronaphthalene is mixed with 9g of diethyl phthalate, placed in a reactor, heated to form a transparent solution, 2g of sulfonated porous carbon nanofibers are added to the reactor, and heated at 60°C Mechanically agitate the water in an ultrasonic cleaner to form a homogeneous solution.

[0034] (2) Add 39 g of polyphenylene sulfide resin into the reactor, pass in argon to remove the air, raise the temperature to 180° C. while continuously performing mechanical stirring to obtain a homogeneous casting solution, and then let it stand for defoaming.

[0035] (3) Pour the casting solution evenly on the stainless steel plate, scrape it with a film scraper to form a polyphenylene sulfide / porous carbon nanofiber composite film, then soak it in tetrachloromethane, heat to 50 ° C, and dissolve the diluent. A porous composite membrane is obtained.

[0036] The average pore size of the membrane measured by a capillary pore size tester was 0.19 μm, and the membra...

Embodiment 3

[0038] (1) Mix 60g of benzophenone with 7g of dibutyl phthalate, place in a reactor, heat until a transparent solution is formed, add 4g of fluorinated porous carbon nanofibers into the reactor, and place in a 70°C Mechanically agitate in an ultrasonic cleaner with hot water to form a homogeneous solution.

[0039] (2) Add 29 g of polyphenylene sulfide resin into the reactor, blow in nitrogen to remove the air, raise the temperature to 210° C. while continuously performing mechanical stirring to obtain a homogeneous casting solution, and then let it stand for defoaming.

[0040](3) Pour the casting solution evenly on the stainless steel plate, scrape it with a film scraper to form a polyphenylene sulfide / porous carbon nanofiber composite film, then soak it in cyclohexanone, heat to 60°C, and dissolve the diluent, A porous composite membrane is obtained.

[0041] The average pore size of the membrane measured by a capillary pore size tester was 0.15 μm, and the membrane reject...

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Abstract

The invention relates to a polyphenylene sulfide / porous carbon nanofiber composite membrane and a preparation method thereof. The material composition, by percentage content, comprises 40-80% of a diluent; 10-1% of an additive; 10-1% of carbon nanofibers; and 40-18% of polyphenylene sulfide. The average pore diameter of the prepared composite membrane is 0.02-0.2 mu m. The polyphenylene sulfide / porous carbon nanofiber composite membrane is prepared by taking polyphenylene sulfide with acid and alkali resistance, high temperature resistance and solvent resistance as a base membrane material andadjusting the mass fractions of polyphenylene sulfide resin, the diluent, the additive and porous fluorinated, nitrified or sulfonated carbon nanofibers, and the polyphenylene sulfide / porous carbon nanofiber composite membrane is prepared through structure regulation and control. The separation efficiency of antibiotic macromolecules, dye molecules and heavy metals in industrial wastewater is greatly improved, the problem of low separation efficiency of a traditional polyphenylene sulfide membrane is solved, and the method has a wide application prospect in the field of industrial wastewatertreatment.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a polyphenylene sulfide / porous carbon nanofiber composite membrane and a preparation method thereof. Background technique [0002] At present, in the field of separation technology, due to the development and continuous progress of society, membrane separation technology has gradually entered people's field of vision. The core of membrane separation is to use the membrane as a medium to selectively transport various solutes. The separation mechanism is determined by the size difference of different solutes or the interface between solutes and membranes. As a very mature process technology, membrane technology has been widely used in seawater desalination, wastewater treatment, biotechnology, textile manufacturing, gas separation, food and other fields. In the research on membranes in the past few decades, people have studied a variety of membrane materials, including p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/02B01D67/00B01D71/66C02F1/44
CPCB01D69/12B01D69/02B01D67/0079B01D71/66C02F1/44B01D2325/36B01D2325/38
Inventor 张宝忠李振环张志全杨雨强高路瑶王彦宁付会娟
Owner CHINA PETROLEUM & CHEM CORP
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