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Preparing method for temperature controlling ionic absorbing fibre

A technology of ion adsorption and fiber, which is applied in the fields of radiation chemistry and chemical engineering, and can solve the problems of high consumption of pure water, waste liquid pure water consumption, waste of water resources, etc.

Inactive Publication Date: 2005-02-23
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional ion exchange resins, whether it is wastewater treatment or the enrichment and recovery of metal ions, will produce a large amount of acid and alkali wastewater while obtaining metal ions and standard water, and consume a large amount of pure water
In this way, it not only causes a lot of waste of water resources, but also increases the cost of regeneration.
Using grafted modified fiber instead of ion exchange resin, although the amount of acid and alkali in the regeneration process can be reduced correspondingly, but there is still waste liquid generation and pure water consumption

Method used

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  • Preparing method for temperature controlling ionic absorbing fibre
  • Preparing method for temperature controlling ionic absorbing fibre
  • Preparing method for temperature controlling ionic absorbing fibre

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment one: see figure 1 , this embodiment adopts co-irradiation grafting method to prepare temperature-controlled ion adsorption fiber: immerse polypropylene (PP) fiber in the grafting solution, and then send the reaction system into the irradiation hall for irradiation through the transmission device, and the irradiation source adopts γ-rays, the dose is 10kGy. After irradiation, the fibers are taken out, and the monomers and homopolymers on the surface are washed away to obtain graft-modified PP fibers with temperature-controlled ion adsorption-desorption functions. The formula of the grafting solution is: N-isopropylacrylamide (NIPAAm) 5%, acrylamide (AAm) 3%, acrylic acid 1%; copper chloride CuCl 2 0.01%, the solvent is deionized water. The grafting ratio of 25 is appropriate.

Embodiment 2

[0017] Embodiment two: see figure 2 , In this example, pre-irradiation grafting is used to prepare temperature-controlled ion-adsorbing fibers: polypropylene (PP) fibers are introduced into a radiation field through an irradiation transmission device for irradiation, and the irradiation source is γ-rays with a dose of 60 kGy. Inject the grafting liquid into the reactor, immerse the pre-irradiated fiber in the grafting liquid after nitrogen deoxygenation for 10 minutes, pass nitrogen deoxygenation again for 10 minutes, then place the reactor at an appropriate temperature for grafting reaction, The reaction temperature was 60°C, and the reaction time was 8 hours. After the reaction, the fiber is taken out, and the homopolymer and monomer on the surface are washed away to obtain a graft-modified PP fiber with temperature-controlled ion adsorption-desorption function. The formula of grafting liquid is: N-isopropylacrylamide (NIPAAm) 5%; Acrylamide (AAm) 3%; Acrylic acid (AAc) 1%...

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Abstract

This invention involves the making method of a kind of temperature-controled adsorption fibre. It belongs to radiate chemistry engineering technology field. The invention mainly uses rediate graft and advance graft. The rediate graft is put the polypropylene fibre in the graft liquid, and then via the transmission equipment put the feedback into the radiate room to radiate.

Description

technical field [0001] The invention relates to a preparation method of a temperature-controlled ion-adsorbing fiber, which belongs to the technical fields of radiation chemistry and chemical engineering. Background technique [0002] Commonly used methods for treating wastewater containing metal ions include electrolysis, precipitation, and ion exchange. In recent years, the role of grafted modified fibers in the recovery, concentration, enrichment and separation of metal ions has attracted much attention. Because the adsorption of metal ions by grafted fibers has the advantages of fast speed, high selectivity, and easy elution and regeneration, it has a wide range of application values ​​in metal resource protection, industrial wastewater treatment, and marine resource utilization. [0003] Traditional metal ion exchange resins or fibers generally use strong acid and weak acid radicals to exchange ions, and then use acid, alkali, etc. for desorption and water washing to r...

Claims

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Application Information

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IPC IPC(8): D06M14/28
Inventor 陈捷杨黎明裴勇
Owner SHANGHAI UNIV
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