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SPEEK (sulfonated polyether ether ketone)-PVDF (polyvinylidene fluoride) gas regulating composite membrane, and preparation and application thereof

A technology of gas regulation and composite membrane, which is applied in the field of membrane materials, can solve the problems of application limitation, high melting point, difficult processing and film formation, etc., and achieve the effects of simple preparation method, easy control of film formation conditions, and good industrial application prospects

Active Publication Date: 2017-05-10
广州稻荷资讯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to their excellent performance, PEEK and PVDF have become indispensable and important materials in the fields of medical treatment, energy, aviation, and food. However, due to the stable nature of PEEK, it is difficult to dissolve in almost all solvents, and its high melting point makes it difficult to process into Membrane, therefore, a single PEEK as a membrane material, its application is greatly restricted

Method used

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  • SPEEK (sulfonated polyether ether ketone)-PVDF (polyvinylidene fluoride) gas regulating composite membrane, and preparation and application thereof
  • SPEEK (sulfonated polyether ether ketone)-PVDF (polyvinylidene fluoride) gas regulating composite membrane, and preparation and application thereof
  • SPEEK (sulfonated polyether ether ketone)-PVDF (polyvinylidene fluoride) gas regulating composite membrane, and preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Accurately weigh 10g of polyetheretherketone (PEEK) brown cylindrical particles into a flask, slowly pour 200mL of 98% concentrated H 2 SO 4 , placed in a constant temperature water bath with mechanical stirring and heating. Stir at 60°C and 300r / min for 7h until the PEEK is completely dissolved to obtain a brownish yellow solution. The above brownish yellow solution was slowly added dropwise into a large amount of ice-water mixture to form a white solid, which was then washed with deionized water several times until the pH of the washing liquid was close to 7. The washed polymer was dried in an oven at 60° C. for 24 hours to obtain the product sulfonated polyether ether ketone (SPEEK).

[0030] (2) Accurately weigh 2g of sulfonated polyetheretherketone (SPEEK) and 2g of polyvinylidene fluoride (PVDF) solids, put them into a prepared 100ml beaker, and slowly pour 50mL of N,N-dimethylformamide ( DMF), placed in a constant temperature magnetic stirrer to stir, kept...

Embodiment 2

[0033] (1) Accurately weigh 10g of polyetheretherketone (PEEK) brown cylindrical particles into a flask, slowly pour 200mL of 98% concentrated H 2 SO 4 , placed in a constant temperature water bath with mechanical stirring and heating. Stir at 60°C and 300r / min for 7h until the PEEK is completely dissolved to obtain a brownish yellow solution. The above brownish yellow solution was slowly added dropwise into a large amount of ice-water mixture to form a white solid, which was then washed with deionized water several times until the pH of the washing liquid was close to 7. The washed polymer was dried in an oven at 60° C. for 24 hours to obtain the product sulfonated polyether ether ketone (SPEEK).

[0034] (2) Accurately weigh 1g of sulfonated polyetheretherketone (SPEEK) and 3g of polyvinylidene fluoride (PVDF) solids, put them into a prepared 100ml beaker, and slowly pour 50mL of N,N-dimethylformamide ( DMF), placed in a constant temperature magnetic stirrer to stir, kept...

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Abstract

The invention belongs to the technical field of membrane materials, and discloses an SPEEK (sulfonated polyether ether ketone)-PVDF (polyvinylidene fluoride) gas regulating composite membrane, and preparation and application thereof. A preparation method is characterized in that PEEK (polyether ether ketone) is added into a container; then, concentrated H2SO4 is added; heating and stirring are performed until the PEEK is completely dissolved; a claybank solution is obtained; the claybank solution is dripped into an ice and water mixture to form a white solid; the solid is washed and dried to obtain SPEEK; the SPEEK and PVDF are together dissolved into DMP (dimethyl phthalate) to obtain a casting membrane solution; then, the casting membrane solution is subjected to curtain coating on a flat plate to form a membrane; drying and membrane uncovering are performed to obtain the SPEEK-PVDF gas regulating composite membrane. The preparation method is simple; the membrane forming conditions are easy to control; the obtained SPEEK-PVDF gas regulating composite membrane has an obvious inhibiting effect on fruit and vegetable breathing, and can be applied to fruit and vegetable gas regulation fresh keeping.

Description

technical field [0001] The invention belongs to the technical field of membrane materials, and in particular relates to a SPEEK-PVDF gas-regulating composite membrane and its preparation and application. Background technique [0002] The storage and preservation of fresh fruits and vegetables is an important topic in the food field. Fresh fruits and vegetables are indispensable food in people's life, but their tissues have high water content, are easy to spoil and deteriorate, and have a short shelf life at room temperature. They have strong seasonality, variability, and regional disadvantages in production. The research on fruit and vegetable preservation technology at home and abroad is increasing day by day, and the research direction is gradually developing to many fields such as materials science, food chemistry, organic chemistry, biology, mechanical engineering and so on. At present, the main fresh-keeping technologies include plastic wrap, refrigeration, sterilizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L61/16C08L27/16C08G8/28
CPCC08G8/28C08J5/18C08L27/16C08L61/16C08L2203/16
Inventor 肖凯军杨小翠何其李华玉
Owner 广州稻荷资讯科技有限公司