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Polyether copolyamide pervaporation membrane as well as preparation method and application thereof

A technology of polyether copolyamide and pervaporation membrane, which is applied in the field of membrane separation, can solve problems such as poor compatibility, and achieve the effects of good film formation, convenient operation, and excellent separation performance

Inactive Publication Date: 2014-02-19
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of poor compatibility between inorganic particles and polymer materials in pervaporation membranes, and at the same time provide a preparation method for polyether copolyamide pervaporation membranes with large permeation flux and good separation effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of preparation of polyether copolyamide pervaporation membrane, comprises the following steps, described formula proportion is by weight: take 20 parts of polyether copolyamide (polytetrahydrofuran: nylon 12=4: 1), 70 parts of n-butyl Alcohol and 10 parts of metal organic compound ZIF-7 were stirred and mixed at 80° C. for 5 hours to obtain a casting solution. After standing for 10 minutes for degassing, apply it on the polyethersulfone composite membrane supported by non-woven fabric, air-dry it at room temperature for 48 hours, and then put it in a vacuum drying oven for 12 hours to obtain polyether copolyamide pervaporation membrane.

[0018] The measured separation factor of polyether copolyamide pervaporation membrane to 5wt% ethyl acetate aqueous solution is α=82.66, and the flux of ethyl acetate is J=76.24g / m 2 h.

Embodiment 2

[0020] A kind of preparation of polyether copolyamide pervaporation membrane, comprises the following steps, described formula ratio is by weight: take 20 parts of polyether copolyamide (polytetrahydrofuran: nylon 12=1: 3), 60 parts of n-butyl Alcohol and 20 parts of metal organic compound ZIF-8 were stirred and mixed at 100° C. for 4 hours to obtain a casting solution. After standing for degassing for 20 minutes, apply it on the polyethersulfone composite membrane supported by non-woven fabric, air-dry it at room temperature for 24 hours, and then put it in a vacuum drying oven for 15 hours to obtain the polyether copolyamide pervaporation membrane.

[0021] The measured separation factor of polyether copolyamide pervaporation membrane to 1wt% isopropyl acetate aqueous solution is α=133.33, and the flux of isopropyl acetate is J=65.83g / m 2 h.

Embodiment 3

[0023] A kind of preparation of polyether copolyamide pervaporation membrane, comprises the following steps, described formula proportion is by weight: take 15 parts of polyether copolyamide (polytetrahydrofuran: nylon 12=7: 3), 75 parts of n-butyl The mixed solution of alcohol:n-propanol=3:1 and 10 parts of metal organic compound ZIF-9 were stirred and mixed at 70° C. for 3 hours to obtain a casting solution. After standing for degassing for 30 minutes, apply it on the polyethersulfone composite membrane supported by non-woven fabric, air-dry it at room temperature for 24 hours, and then put it in a vacuum drying oven for 24 hours to obtain the polyether copolyamide pervaporation membrane.

[0024] The measured separation factor of polyether copolyamide pervaporation membrane to 1wt% butyl acetate aqueous solution is α=79.56, and the flux of butyl acetate is J=85.45g / m 2 h.

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PUM

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Abstract

The invention relates to a polyether copolyamide pervaporation membrane as well as a preparation method and an application thereof, and belongs to the technical field of membrane separation. The preparation method comprises the following steps: mixing polyether copolyamide and a metal organic compound with a solvent at a certain temperature to obtain a membrane casting solution, coating a polyether sulfone composite membrane supported by nonwoven cloth with the membrane casting solution, standing for a period of time in air, and drying in a vacuum drying box for several hours to obtain the polyether copolyamide pervaporation membrane. The polyether copolyamide pervaporation membrane prepared by the method is large in permeation flux, good in separation effect, good in strength, stable in structure and suitable for removing volatile organic compounds, especially volatile ester compounds from water.

Description

technical field [0001] The invention relates to a polyether copolyamide pervaporation membrane, a preparation method and an application thereof, and belongs to the technical field of membrane separation. Background technique [0002] In recent years, the pollution of volatile organic compounds (VOC) in water has become more and more serious. Because it cannot be removed by other methods (such as burning, etc.) or it will cause secondary pollution, it cannot meet the environmental protection emission requirements, and it can be recycled because of its economic value. , such as ethyl acetate. Membrane separation method is a new type of high-efficiency separation method, which is mainly based on the difference in the selective permeability of the membrane to organic matter and water to separate the two. Among them, the pervaporation technology has the advantages of high selectivity, low energy consumption and mild operating temperature. The efficiency of the pervaporation proc...

Claims

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Application Information

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IPC IPC(8): B01D71/56B01D69/12B01D69/10B01D67/00B01D61/36C02F1/44
Inventor 张春芳张欣然白云翔顾瑾孙余凭
Owner JIANGNAN UNIV
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