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 fracture, broken, and poor mechanical properties, and achieve extended service life and stable performance , the effect of good mechanical properties

Active Publication Date: 2012-07-18
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 a

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

Examples

Experimental program
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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 an amidoxime-based chelate polyacrylonitrile fiber and its preparation method. The preparation method of the amidoxime-based chelate polyacrylonitrile fiber comprises the following steps that 1, polyacrylonitrile fibers are subjected to irradiation cross-linking under the conditions of an inert gas atmosphere and an irradiation amount of 20 to 2000kGy; and 2, the polyacrylonitrile fibers subjected to irradiation cross-linking undergo an amidoximation reaction. The invention also provides a use of the amidoxime-based chelate polyacrylonitrile fiber as a metal ion adsorption material. Through the preparation method which is simple relatively, the amidoxime-based chelate polyacrylonitrile fiber which has good mechanical properties, high fiber breaking strength, a long reuse life and stable performances and is damaged difficultly is obtained. The amidoxime-based chelate polyacrylonitrile fiber can be utilized as a metal ion adsorption material, is suitable for the fields of purification of industrial waste water or slag, or extraction of uranium of seawater, has excellent effects of adsorbing multiple metal ions, and can greatly reduce an industrial cost.

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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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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