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A kind of preparation method of grafted polypropylene non-woven fabric-based ion exchange material

A polypropylene non-woven fabric, ion exchange material technology, applied in chemical instruments and methods, textiles and papermaking, other chemical processes, etc., can solve the problems of difficult large-scale production, high grafting cost, and low grafting rate. , to achieve the effect of fast exchange rate, simple desorption and large specific surface area

Inactive Publication Date: 2017-12-29
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above grafting methods can achieve the purpose of grafting, they all have the common problems of low grafting rate, high grafting cost, low utilization rate of monomers, and difficulty in large-scale production.

Method used

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  • A kind of preparation method of grafted polypropylene non-woven fabric-based ion exchange material
  • A kind of preparation method of grafted polypropylene non-woven fabric-based ion exchange material
  • A kind of preparation method of grafted polypropylene non-woven fabric-based ion exchange material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Wash the polypropylene non-woven fabric repeatedly with boiling water. After washing, put the sample into a Soxhlet extractor and extract it with acetone for 48 hours. After the extraction is completed, put it in an oven at 80°C and dry it. Add a photosensitizer ethanol solution with a concentration of 1.0wt% into the dish, soak in the dark, and the ethanol will completely volatilize after about 4 hours. Add then in the quartz glass tube that has 30ml acrylic acid (concentration 20.0wt%) solution, after logical nitrogen 10min, irradiate 7h under the ultraviolet light source of 7W, the acrylic acid monomer that remains on its surface with boiling water washing is completed in reaction, and in Extract with acetone in a Soxhlet extractor to wash away short-chain self-polymers, weigh and calculate after drying, and obtain a modified non-woven fabric sample with a grafting rate of 2031.2%.

[0029] Take 0.1g of the grafted sample of this embodiment, add it to 50ml, pH=6, Ce ...

Embodiment 2

[0031] Wash the polypropylene non-woven fabric repeatedly with boiling water. After washing, put the sample into a Soxhlet extractor and extract it with acetone for 48 hours. After the extraction is completed, put it in an oven at 80°C and dry it. Add a photosensitizer ethanol solution with a concentration of 0.5wt% into the dish, soak in the dark, and the ethanol will completely volatilize after about 4 hours. Add then in the quartz glass tube that has 30ml acrylic acid (concentration 17.5wt%) solution, after logical nitrogen 10min, irradiate 7h under the ultraviolet light source of 7W, the acrylic acid monomer that remains on its surface with boiling water washing is completed in reaction, and in Extract with acetone in a Soxhlet extractor to wash away short-chain self-polymers, weigh and calculate after drying, and obtain a modified non-woven fabric sample with a grafting rate of 2551.3%.

[0032] The scanning electron micrographs of non-woven fabrics with different magnifi...

Embodiment 3

[0038] Wash the polypropylene non-woven fabric repeatedly with boiling water. After washing, put the sample into a Soxhlet extractor and extract it with acetone for 24 hours. After the extraction is completed, put it in an oven at 80°C and dry it. Add a photosensitizer ethanol solution with a concentration of 0.3wt% into the dish, soak in the dark, and the ethanol will completely volatilize after about 4 hours. Add then in the quartz glass tube that has 30ml acrylic acid (concentration 2.5wt%) solution, after logical nitrogen 10min, irradiate 7h under the ultraviolet light source of 7W, the acrylic acid monomer that remains on its surface with boiling water washing is completed after reaction, and in Extract with acetone in a Soxhlet extractor to wash away short-chain self-polymers, weigh and calculate after drying, and a modified non-woven fabric sample with a graft rate of 172.4% can be obtained.

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Abstract

The invention discloses a preparation method of a grafted polypropylene non-woven fabric-based ion exchange material. The process is as follows, the polypropylene non-woven fabric is washed with boiling water, extracted with acetone, put into the photosensitizer solution, soaked in the dark until the volatile matter is completely volatilized, and then dried; the photosensitizer solution is benzophenone dissolved in volatile organic The solvent is prepared; the polypropylene non-woven fabric obtained in the previous step is immersed in the grafting liquid, and the grafting reaction is carried out under ultraviolet light irradiation. After the reaction is completed, it is washed with boiling water, extracted with acetone, and dried to obtain the grafted polypropylene non-woven fabric. Exchange material; wherein the grafting liquid is acrylic acid aqueous solution. Utilize the conventional ultraviolet photoinitiation technology, adopt the method of solution grafting after photosensitizer load first, improve the grafting rate; Introduce the acrylic acid monomer with functional group into the polypropylene non-woven fabric substrate by bonding; the preparation The process of the method is simple, the reaction atmosphere does not need to be strictly controlled, and the method improves the utilization rate of the photosensitizer and the grafted monomer.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method of a grafted polypropylene non-woven fabric-based ion exchange material. Background technique [0002] With the improvement of people's awareness of environmental protection and the pressure from many aspects of the society, the treatment of industrial and agricultural wastewater, especially the treatment of heavy metal ions, has become increasingly prominent; as a unique ionic rare earth mineral in my country, its high content of rare earth ion mining The discharge of waste water has caused a large loss of valuable resources. Due to the technical or economic problems of traditional heavy metal treatment methods such as electrolysis, membrane separation, and chemical precipitation, their application fields are limited. In order to solve this problem, scientific researchers have turned more attention to the research of high-performance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M14/28B01J20/26B01J20/30
Inventor 刘晨严春杰罗文君葛文李徐坚周森
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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