A method for enhancing interfacial adhesion between organic separation membrane and support material

A support material and interface bonding technology, which is applied in the direction of semipermeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve problems such as easy generation of a large amount of waste acid and alkali, unsuitable for industrialization, and high cost of waste liquid treatment. Achieve the effects of avoiding adverse effects, enhancing mechanical properties, and improving peel strength

Active Publication Date: 2021-04-27
天津普栋科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been a lot of research efforts to improve the interfacial adhesion properties of matrix / reinforcement composites, such as chemical etching and grafting, plasma treatment, surface coating, etc., but the interfacial adhesion between organic separation membranes and support materials Relevant research has not been reported yet, and methods commonly used to improve interface adhesion, such as chemical treatment, plasma treatment, flame treatment, etc., are mostly complicated in process, expensive in equipment, high in production cost and prone to produce a large amount of pollutants such as waste acid and alkali. , the cost of waste liquid treatment in the later stage is huge, and it is not suitable for large-scale industrialization

Method used

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  • A method for enhancing interfacial adhesion between organic separation membrane and support material
  • A method for enhancing interfacial adhesion between organic separation membrane and support material
  • A method for enhancing interfacial adhesion between organic separation membrane and support material

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Embodiment 1

[0041] This embodiment provides a method for enhancing the interfacial adhesion between an organic separation membrane and a support material. The specific implementation steps include surface cleaning and drying of the support material (PET (polyester) non-woven fabric), surface hydroxylation treatment, surface There are four steps in modification treatment and preparation of interface-enhanced organic separation membrane, and the specific implementation steps are as follows:

[0042] Surface cleaning and drying of PET non-woven fabrics: prepare 500 mL of 15 g / L sodium hydroxide aqueous solution and 7 g / L AEO-8 aqueous solution, and mix the two solutions evenly. Immerse the PET non-woven fabric in the mixed solution for 20 minutes, take it out, rinse it with clean water, and dry it in an oven at 70°C.

[0043] Surface-rich hydroxylation treatment: soak the dried PET non-woven fabric in 200g / L sodium hydroxide aqueous solution for 30 minutes, take it out and rinse the surface ...

Embodiment 2

[0059] This embodiment provides a method for enhancing the interfacial adhesion between an organic separation membrane and a support material. The specific implementation steps include surface cleaning and drying of the support material (PET (polyester) non-woven fabric), surface hydroxylation treatment, surface There are four steps in modification treatment and preparation of interface-enhanced organic separation membrane, and the specific implementation steps are as follows:

[0060] Surface cleaning and drying of PET non-woven fabrics: prepare 500 mL of 15 g / L sodium hydroxide aqueous solution and 7 g / L AEO-8 aqueous solution, and mix the two solutions evenly. Immerse the PET non-woven fabric in the mixed solution for 20 minutes, take it out, rinse it with clean water, and dry it in an oven at 70°C.

[0061] Surface-rich hydroxylation treatment: soak the dried PET non-woven fabric in 200g / L sodium hydroxide aqueous solution for 30 minutes, take it out and rinse the surface ...

Embodiment 3

[0066] This embodiment provides a method for enhancing the interfacial adhesion between an organic separation membrane and a support material. The specific implementation steps include surface cleaning and drying of the support material (PET (polyester) non-woven fabric), surface hydroxylation treatment, surface There are four steps in modification treatment and preparation of interface-enhanced organic separation membrane, and the specific implementation steps are as follows:

[0067] Surface cleaning and drying of PET non-woven fabrics: prepare 500 mL of 15 g / L sodium hydroxide aqueous solution and 7 g / L AEO-8 aqueous solution, and mix the two solutions evenly. Immerse the PET non-woven fabric in the mixed solution for 20 minutes, take it out, rinse it with clean water, and dry it in an oven at 70°C.

[0068] Surface-rich hydroxylation treatment: soak the dried PET non-woven fabric in 200g / L sodium hydroxide aqueous solution for 30 minutes, take it out and rinse the surface ...

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Abstract

The present invention is a method for enhancing the interfacial adhesion between an organic separation membrane and a support material. The method includes the following steps: immersing the support material in an aqueous solution of sodium hydroxide, so that the surface of the material is enriched with sufficient hydroxyl groups to achieve the purpose of coarsening the material fibers, and then the treated support material is immersed in the silane coupling agent hydrolysis solution for a period of time time, take it out and dry it, use the surface-modified material as the support material during membrane production, evenly coat the casting liquid on it, immerse it in deionized water to gel to form a membrane, and then obtain an interface-enhanced organic separation membrane . The composition of the membrane casting liquid includes membrane material, additives and solvent, and the membrane material is polyvinylidene fluoride, polyethersulfone or polysulfone. The peeling strength of the interface between the organic separation membrane and the support material treated by the method of the present invention can be increased by about 50%-70%.

Description

technical field [0001] The invention relates to a method for enhancing the interfacial adhesion between an organic separation membrane and a support material, specifically a method for treating the support material with chemical treatment combined with a silane coupling agent surface modification, thereby improving the interfacial adhesion between it and the organic separation membrane. Compatibility and mechanical properties of the film process. Background technique [0002] Organic separation membranes are processed from polymer materials, such as polyvinylidene fluoride (PVDF), polysulfone (PSF), polyethersulfone (PES), polyacrylonitrile (PAN), cellulose acetate (CA), etc. Due to the advantages of high filtration precision, high selectivity, wide selection of materials, low manufacturing cost per unit membrane area, and high packing density of membrane modules, organic membranes are widely used in the field of water resource utilization and industrial special separation. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/10B01D71/34B01D71/68
CPCB01D67/0002B01D67/0011B01D69/105B01D71/34B01D71/68
Inventor 王志英韩承志李春利宁素素杨振生
Owner 天津普栋科技有限公司
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