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Hydrophilic high-molecular polymer film as well as preparation method and application thereof

A hydrophilic polymer, polymer membrane technology, applied in separation methods, chemical instruments and methods, membranes, etc., can solve the problems of poor hydrophilicity and low porosity of pure PBT membranes, and achieve enhanced permselectivity, environmental protection, etc. Friendly, simple and economical preparation method

Active Publication Date: 2020-02-07
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The first object of the present invention is to provide a kind of hydrophilic high molecular polymer film; The hydrophilic high molecular polymer film has good hydrophilicity, strong thermal stability and good selective permeability, which solves the problem of pure PBT membrane hydrophilicity. The problem of poor water quality and low porosity effectively enhances the selective permeability of the membrane to the mixed gas of water and methane

Method used

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  • Hydrophilic high-molecular polymer film as well as preparation method and application thereof
  • Hydrophilic high-molecular polymer film as well as preparation method and application thereof
  • Hydrophilic high-molecular polymer film as well as preparation method and application thereof

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Embodiment 1

[0053] The present embodiment provides a kind of preparation method of hydrophilic polymer membrane, comprises the following steps:

[0054] 1) Dissolve the mixture of PBT and PEG1000 in the organic solvent HFIP, and stir at 50°C for 5 hours to obtain a uniform transparent casting solution; let the casting solution stand for 12 hours to remove the bubbles in the casting solution;

[0055] In parts by weight, in the casting solution, PBT and PEG1000 account for 15 parts, HFIP accounts for 85 parts, and the mass ratio of PBT and PEG1000 is 7:3;

[0056] 2) Pour the casting solution obtained in step 1) onto a glass plate, and scrape the film at a constant speed with a film scraper with a thickness of 200 μm to obtain a wet polymer film;

[0057] 3) Put the glass plate formed with the wet polymer film into the coagulation bath, phase inversion occurs, and after solidification for 1min, a nascent film is formed; in parts by weight, deionized water accounts for 70 parts in the coagu...

Embodiment 2

[0064] The present embodiment provides a kind of preparation method of hydrophilic polymer membrane, comprises the following steps:

[0065] 1) Dissolve the mixture of PBT and PEG1000 in the organic solvent HFIP, and stir at 50°C for 5 hours to obtain a uniform transparent casting solution; let the casting solution stand for 12 hours to remove the bubbles in the casting solution;

[0066] In parts by weight, in the casting solution, PBT and PEG1000 account for 15 parts, HFIP accounts for 85 parts, and the mass ratio of PBT and PEG1000 is 7:3;

[0067] 2) Pour the casting solution obtained in step 1) onto a glass plate, and scrape the film at a constant speed with a film scraper with a thickness of 200 μm to obtain a wet polymer film;

[0068] 3) put the glass plate formed with the wet state polymer film into the coagulation bath, phase inversion occurs, and after solidification for 1min, a nascent film is formed; in parts by weight, in the coagulation bath, deionized water acc...

Embodiment 3

[0072] The present embodiment provides a kind of preparation method of hydrophilic polymer membrane, comprises the following steps:

[0073] 1) Dissolve the mixture of PBT and PEG1000 in the organic solvent HFIP, and stir at 50°C for 5 hours to obtain a uniform transparent casting solution; let the casting solution stand for 12 hours to remove the bubbles in the casting solution;

[0074] In parts by weight, in the casting solution, PBT and PEG1000 account for 15 parts, HFIP accounts for 85 parts, and the mass ratio of PBT and PEG1000 is 7:3;

[0075] 2) Pour the casting solution obtained in step 1) onto a glass plate, and scrape the film at a constant speed with a film scraper with a thickness of 200 μm to obtain a wet polymer film;

[0076] 3) Put the glass plate formed with the wet state polymer film into the coagulation bath, phase inversion occurs, and after solidification for 1min, a primary film is formed; in parts by weight, in the coagulation bath, PEG400 accounts for...

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Abstract

The invention discloses a hydrophilic high-molecular polymer film as well as a preparation method and application thereof. The hydrophilic high-molecular polymer film is prepared from the following raw material components: polybutylene terephthalate and polyethylene glycol, wherein the mass percent of the polybutylene terephthalate ranges from 50 wt% to 70 wt%, and the mass percent of the polyethylene glycol ranges from 30 wt% to 50 wt%. The invention also provides the preparation method of the hydrophilic high-molecular polymer film and the application of the hydrophilic high-molecular polymer film in film method natural gas dehydration. The separation film is prepared by adopting a phase inversion method, and the prepared hydrophilic high-molecular polymer film is a hydrophilic film witha compact skin layer and a microporous support layer; the problems of poor hydrophilicity and low porosity of a pure polybutylene terephthalate film are solved, and the selective permeability of thefilm to A mixed gas of water and methane is effectively enhanced; and the preparation method is simple, economical, environmentally friendly and suitable for industrial application and popularization.

Description

technical field [0001] The invention relates to the technical field of polymer membrane materials. More specifically, it relates to a hydrophilic high molecular polymer film and its preparation method and application. Background technique [0002] As the fossil fuel with the highest combustion calorific value and the cleanest, natural gas is widely used as an important raw material for industrial products. The produced natural gas usually contains a certain amount of saturated water vapor, which has a great influence on the subsequent processing and transportation. Therefore, natural gas dehydration becomes inevitable. At present, the methods commonly used in natural gas dehydration are: solvent absorption method, low temperature condensation method, solid adsorption method, membrane separation method, etc. Compared with the traditional natural gas dehydration method, the emerging membrane separation method occupies less land, is less restricted by geographical conditions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/02B01D71/48B01D71/52B01D67/00B01D53/22C10L3/10
CPCB01D53/228B01D67/0011B01D67/0013B01D67/0016B01D69/02B01D71/48B01D71/52B01D2325/36C10L3/106
Inventor 张晓灿李田田周倩张瑛林平林裴桐卿双永贾勃海王孟欣
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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