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A kind of preparation method of loofah base cation exchange fiber

An ion-exchange fiber and loofah-based cation technology, which is applied in the direction of cation exchange materials, ion exchange water/sewage treatment, etc., can solve the problems of difficult large-scale production, high grafting cost, and low grafting rate, and achieve exchange Fast rate, simple desorption, and large specific surface area

Inactive Publication Date: 2017-10-27
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 loofah base cation exchange fiber
  • A kind of preparation method of loofah base cation exchange fiber
  • A kind of preparation method of loofah base cation exchange fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Firstly, the naturally grown loofah is air-dried, then cut, the skin and the loofah seeds inside the pores are removed, and the loofah is cut into blocks. Put the lump loofah in boiling water and boil for 20 minutes, then wash with distilled water to remove surface impurities, put it in an oven to dry at 40°C, and set aside. Get a certain quality of the above block loofah and put it into a petri dish, add 10ml of photosensitizer / ethanol solution with a concentration of 1.0wt%, put it into a fume hood and soak it in the dark; Transfer to a 40ml quartz glass test tube, add 20ml of acrylic acid / water solution with a concentration of 10.0wt%, seal the test tube with a rubber stopper, and react for 7h under a UV lamp with a power of 100W. After the reaction is completed, wash the remaining acrylic acid monomer on the surface with boiling water , and extracted with acetone in a Soxhlet extractor to wash off short-chain self-polymers, weighed and calculated after drying, and o...

Embodiment 2

[0033] Firstly, the naturally grown loofah is air-dried, then cut, the skin and the loofah seeds inside the pores are removed, and the loofah is cut into blocks. Put the lump loofah in boiling water and boil for 20 minutes, then wash with distilled water to remove surface impurities, put it in an oven to dry at 40°C, and set aside. Get a certain quality of the above block loofah and put it into a petri dish, add 10ml of photosensitizer / methanol solution with a concentration of 0.5wt%, put it into a fume hood and soak it in the dark; Transfer to a 40ml quartz glass test tube, add 20ml of acrylic acid / water solution with a concentration of 15.0wt%, seal the test tube with a rubber stopper, and react for 48h under a 7W UV lamp. After the reaction is completed, wash the remaining acrylic acid monomer on the surface with boiling water , and extracted with acetone in a Soxhlet extractor to wash away short-chain self-polymers, weighed and calculated after drying, a loofah-based catio...

Embodiment 3

[0036]Firstly, the naturally grown loofah is air-dried, then cut, the skin and the loofah seeds inside the pores are removed, and the loofah is cut into blocks. Put the lump loofah in boiling water and boil for 20 minutes, then wash with distilled water to remove surface impurities, put it in an oven to dry at 40°C, and set aside. Get the above-mentioned block loofah of a certain quality and put it into a petri dish, add 10ml of concentration and be 0.2wt% photosensitizer / isopropanol solution, put into a fume hood and soak in the dark; after the photosensitizer solution is naturally volatilized completely, Transfer the loofah to a 40ml quartz glass test tube, add 20ml of acrylic acid / water solution with a concentration of 20.0wt%, seal the test tube with a rubber stopper, and react for 7 hours under a 100W ultraviolet lamp. After the reaction is completed, wash the remaining acrylic acid on the surface with boiling water monomer, and extracted with acetone in a Soxhlet extract...

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Abstract

The invention discloses a method for preparing loofah sponge-based cation exchange fibers. The method comprises the following steps: airing or drying ripened loofah sponges, removing the skin and inside seeds, and shearing into massive loofah sponges; washing and drying the massive loofah sponges by using boiling water, immersing the loofah sponges in a photosensitizer solution for soaking in a shading mode, and soaking until the volatile components are completely volatilized, wherein the photosensitizer solution is prepared by dissolving diphenyl ketone in a volatile organic solvent; immersing the massive loofah sponges obtained in the previous step in a grafting solution, carrying out a grafting reaction under ultraviolet irradiation, washing and performing acetone extraction after the reaction is ended, drying, thereby obtaining the loofah sponge-based cation exchange fibers, wherein the grafting solution refers to an aqueous solution of acrylic acid. The conventional ultraviolet initiation technology is utilized, a method for sequentially performing photosensitizer loading and solution grafting is adopted, the acrylic monomer with functional groups is introduced to the natural loofah sponge surface in a bonding mode, the utilization rate of the grafting monomers is improved, and the obtained fibers are uniform in grafting and high in adsorption capacity and can be repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method of a loofah-based cation exchange fiber. Background technique [0002] Ion exchange materials are widely used in the treatment of industrial wastewater such as heavy metal ion wastewater and printing and dyeing wastewater. At present, chemical products such as resin / fiber prepared from non-renewable fossil energy are the most common and widely used ion exchange materials in the market; Renewable resources and the development of environmentally friendly products and technologies will become an inevitable trend of scientific research, so the development and utilization of natural biomass-based ion exchange materials is of great significance. In recent years, there have been many studies on the modification of agricultural and forestry wastes such as rice husk, palm, peanut shell, bagasse and loofah to prepare adsorbents with ion exchang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J39/22C02F1/42
CPCB01J39/22C02F2001/425
Inventor 刘晨严春杰罗文君李徐坚周森葛文
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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