A kind of hydrophilic polymer film and its preparation method and application

A technology of hydrophilic polymers and polymer membranes, 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 selective permeability and environmental protection. Friendly, simple and economical preparation method

Active Publication Date: 2021-09-03
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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  • A kind of hydrophilic polymer film and its preparation method and application
  • A kind of hydrophilic polymer film and its preparation method and application
  • A kind of hydrophilic polymer film and its preparation method and application

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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 polymer membrane, a preparation method and application thereof. The raw material components of the hydrophilic polymer film include polybutylene terephthalate and polyethylene glycol; wherein, the mass percentage of polybutylene terephthalate is 50wt% to 70wt %, the mass percentage of polyethylene glycol is 30wt% to 50wt%. The invention also provides a preparation method of the hydrophilic high molecular polymer membrane and its application in the dehydration of natural gas by membrane method. The invention adopts the phase inversion method to prepare the separation membrane, and the prepared hydrophilic high molecular polymer membrane is a hydrophilic membrane with a dense cortex and a microporous support layer; The problem of poor performance and low porosity effectively enhances the selective permeability of the membrane for the mixed gas of water and methane; the preparation method of the invention is simple, economical and environmentally friendly, and is suitable for industrial popularization and application.

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 Patents(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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