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Polyester composite PTFE oil-water separation material

An oil-water separation and polyester technology, applied in polyester coatings, separation methods, liquid separation, etc., can solve the problems of difficult membrane cleaning, fast flux decay, low porosity, etc., to achieve good oil-water separation effect, good hydrophilicity The effect of improving the adhesion and

Inactive Publication Date: 2020-10-13
南京水沝淼净化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrophobic membranes have high mechanical strength, are less affected by surfactants, have lower energy consumption than hydrophilic membranes, and have higher initial flux, which is conducive to oil-water separation. However, due to the poor hydrophilicity of hydrophobic membrane materials, effective The "hydration layer" that prevents the oil droplets from reaching the membrane surface causes a large amount of oil droplets and other impurities to be adsorbed on the membrane surface. The membrane is seriously polluted, the flux decays quickly, and the membrane is difficult to clean.
The other type is hydrophilic membrane materials, such as cellulose and its various derivatives, polyvinyl alcohol, etc. Although good hydrophilicity is conducive to reducing membrane fouling during operation, on the other hand, the hydrophilicity is too high , the film is easy to dissolve, and the interdiffusion between solvent and non-solvent in the phase inversion process will be reduced during the film formation process, resulting in too thick a film skin layer, low porosity, and extremely low flux, which is not suitable for practical industrial applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this embodiment, a polyester composite PTFE oil-water separation material is composed of a substrate and an emulsion film attached to the surface of the substrate. The substrate is graphene oxide, and the emulsion forming the surface coating of the substrate is calculated in parts by weight. Its composition is: 15 parts of polytetrafluoroethylene, 10 parts of polyester, 60 parts of organic solvent, 2 parts of crosslinking agent, and the mass ratio of the matrix to the emulsion is 1:100.

[0030] Wherein, the organic solvent is ethanol, and the crosslinking agent is carbon black.

[0031] The preparation method of the polyester composite PTFE oil-water separation material involved in the present invention is processed according to the following steps:

[0032] (3) Pretreatment of the matrix: dissolving graphene oxide in deionized water at a temperature of 30-50° C., and fully ultrasonically dispersing it for 4-8 hours to obtain a graphene oxide dispersion with a mass ...

Embodiment 2

[0039] In this embodiment, the preparation method of a polyester composite PTFE oil-water separation material and the mass ratio of the matrix to the emulsion are the same as those in Embodiment 1, and will not be repeated here.

[0040] In this embodiment, the emulsion forming the surface coating of the substrate is composed of 16 parts of polytetrafluoroethylene, 12 parts of polyester, 65 parts of organic solvent, and 3 parts of crosslinking agent in parts by weight; The solvent is ethanol; the crosslinking agent is silicon dioxide.

Embodiment 3

[0042] In this embodiment, the preparation method of a polyester composite PTFE oil-water separation material and the mass ratio of the matrix to the emulsion are the same as those in Embodiment 1, and will not be repeated here.

[0043] In this embodiment, the emulsion forming the surface coating of the substrate is composed of 18 parts of polytetrafluoroethylene, 14 parts of polyester, 68 parts of organic solvent, and 4 parts of crosslinking agent in parts by weight; The solvent is triethanolamine; the crosslinking agent is silicon dioxide.

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PUM

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Abstract

The invention relates to the technical field of oil-water separation, and particularly relates to a polyester composite PTFE oil-water separation material. The material is composed of a matrix and anemulsion film attached to the surface of the matrix, wherein the matrix is graphene oxide, an emulsion for forming a coating on the surface of the matrix comprises the following components in parts byweight: 15-20 parts of polytetrafluoroethylene, 10-15 parts of polyester, 60-70 parts of an organic solvent and 2-5 parts of a cross-linking agent, and the mass ratio of the matrix to the emulsion is(1-5):100. The invention aims to provide a polyester composite PTFE oil-water separation material which has super-hydrophobic and oleophylic characteristics and an excellent oil-water separation effect.

Description

technical field [0001] The invention relates to the technical field of oil-water separation, in particular to a polyester composite PTFE oil-water separation material. Background technique [0002] Oil-water mixture is a common environmental pollutant, which has a wide range of sources, from petroleum industry, manufacturing industry, transportation industry and other fields to food and catering, medicine and household life. With the continuous development of social economy, the discharge of oily wastewater is increasing, and the sources are becoming more and more extensive, causing serious environmental pollution and serious waste of water resources. Considering environmental management, recovery of various oils, and water reuse, it is imperative to separate oil and water from oil-water mixtures. [0003] Polymer membrane separation technology is a new type of separation technology. It has simple processing process, low energy consumption and easy automatic control. It is ...

Claims

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Application Information

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IPC IPC(8): B01D17/022C09D127/18C09D167/00C09D7/61C09D7/65
CPCB01D17/02C09D127/18C09D7/61C09D7/65C08L67/00C08K3/04C08K3/36
Inventor 石小军曾玉
Owner 南京水沝淼净化科技有限公司