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Amidoxime-based chelate polyacrylonitrile fiber and its preparation method and application

A polyacrylonitrile fiber and amidoxime-based technology, which is applied in the field of amidoxime-based chelated polyacrylonitrile fiber and its preparation, can solve problems such as poor mechanical properties, fracture, and brokenness, and achieve stable performance and extended service life , the effect of good mechanical properties

Active Publication Date: 2014-07-16
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the defects that the existing amidoxime-based chelated polyacrylonitrile fiber has poor mechanical properties and will be broken and broken after repeated use for 3 times and cannot be used continuously, and provides a kind of fiber with reusable performance. Substantially improved amidoxime-based chelated polyacrylonitrile fiber, its preparation method and use

Method used

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  • Amidoxime-based chelate polyacrylonitrile fiber and its preparation method and application
  • Amidoxime-based chelate polyacrylonitrile fiber and its preparation method and application
  • Amidoxime-based chelate polyacrylonitrile fiber and its preparation method and application

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Effect test

Embodiment 1

[0054] (1) Raw material: 2dtex polyacrylonitrile fiber, breaking strength is 7.2cN / dtex.

[0055] (2) Preparation method: 0.53g is irradiated and cross-linked with a cobalt source under the protection of nitrogen, and the irradiation dose is 500kGy. After irradiation, the fiber breaking strength of polyacrylonitrile is 7.0cN / dtex, which is compared with that before irradiation. Has not changed much. The preparation is carried out according to the molar ratio of nitrile group, hydroxylamine hydrochloride and anhydrous sodium carbonate in the polyacrylonitrile fiber being 1:1:0.5. Accurately weigh 0.69g of hydroxylamine hydrochloride and 0.53g of anhydrous sodium carbonate into 24.8ml of deionized water to prepare a solution with a pH of 7, and heat the solution to 70°C. Put 0.53g of irradiated polyacrylonitrile fibers into the prepared solution. After reacting for 3 hours, the fibers were taken out, washed with water, and dried to obtain 0.63 g of amidoxime-based chelated pol...

Embodiment 2

[0079] (1) Raw material: 2dtex polyacrylonitrile fiber, breaking strength is 7.2cN / dtex.

[0080] (2) Preparation method: the polyacrylonitrile fiber is irradiated and cross-linked with a cobalt source under the protection of nitrogen, and the irradiation dose is 500kGy. The breaking strength of the irradiated polyacrylonitrile fiber is 7.0cN / dtex, which is the same as Little changed from before. The preparation is carried out according to the molar ratio of nitrile group, hydroxylamine hydrochloride and anhydrous sodium carbonate in the polyacrylonitrile fiber being 1:1:0.5. Accurately weigh 0.69g of hydroxylamine hydrochloride and 0.53g of anhydrous sodium carbonate into 24.8ml of deionized water to prepare a solution with a pH of 7, and heat the solution to 70°C. Put 0.53g of irradiated polyacrylonitrile fibers into the prepared solution, take out the fibers after reacting for 3 hours, wash with water, and dry to obtain 0.63g of amidoxime-based chelated polyacrylonitrile f...

Embodiment 3

[0091] (1) The polyacrylonitrile fiber whose raw material is 2dtex has a breaking strength of 7.2cN / dtex.

[0092] (2) Preparation method:

[0093] Accurately weigh 27 parts of 0.53g polyacrylonitrile fiber, and use cobalt source to irradiate and crosslink the polyacrylonitrile fiber under nitrogen environment, divide it into 9 groups, each group has three fibers, and the irradiation dose of each group is 100kGy , 300kGy, 500kGy, 700kGy, 900kGy, 1100kGy, 1300kGy, 1500kGy and 1700kGy. The breaking strength of each group of fibers is 7.1cN / dtex, 7.1cN / dtex, 7.0cN / dtex, 6.9cN / dtex, 6.8cN / dtex, 6.7cN / dtex, 6.6cN / dtex, 6.5cN / dtex, 6.3cN / dtex, has little change in strength compared with polyacrylonitrile fibers.

[0094] The preparation is carried out according to the molar ratio of nitrile group, hydroxylamine hydrochloride and anhydrous sodium carbonate in the polyacrylonitrile fiber being 1:1:0.5. Accurately weigh 15 parts each of 0.69g of hydroxylamine hydrochloride and 0.53...

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Abstract

The invention provides a preparation method of amidoxime-based chelated polyacrylonitrile fibers: (1) under the protection of an inert gas, irradiate crosslinked polyacrylonitrile fibers, and the irradiation dose is 20-2000kGy; (2) The polyacrylonitrile fiber cross-linked by irradiation can undergo amidoximation reaction. The invention also provides the amidoxime chelated polyacrylonitrile fiber prepared by the method and the use of the fiber as a metal ion adsorption material. The invention adopts a relatively simple preparation method to obtain the amidoxime-based chelated polyacrylonitrile fiber with good mechanical properties, which has greater fiber breaking strength and repeated service life, stable performance, and is not easily damaged. The amidoxime-based chelated polyacrylonitrile fiber of the present invention can be used as a metal ion adsorption material for the purification of industrial wastewater or slag, or in the fields of seawater extraction of uranium, etc., has excellent adsorption capacity for various metal ions, and can greatly reduce industrial costs.

Description

technical field [0001] The invention relates to the field of polymer modification, in particular to an amidoxime-based chelated polyacrylonitrile fiber and a preparation method and application thereof. Background technique [0002] With the development of the world economy, the demand for natural resources is increasing. The full collection and reuse of resources is an effective way to alleviate resource tension. Among them, as non-renewable resources, various metals generally have less reserves or more difficult smelting and processing. During the collection, extraction and smelting of metal minerals, a large amount of natural resources such as coal and water need to be consumed, and the environmental impact severe pollution. The rapid development of modern industry is at the cost of consuming a lot of natural resources and destroying the natural environment. In order to achieve sustainable development and reduce environmental pollution, modern industry needs the support...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M10/00D06M13/368B01J20/26B01J20/30D06M101/28
Inventor 吴国忠王谋华张文礼刘伟华邢哲叶泽文何亚星
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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