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Amino and amidoxime polyacrylonitrile nanofiber as well as preparation method and application thereof

A technology of amino-based polyacrylonitrile and polyacrylonitrile, applied in chemical instruments and methods, other chemical processes, conjugated synthetic polymer artificial filaments, etc., can solve the problem of poor uniformity of polyacrylonitrile fiber functionalization reaction and functionalization Problems such as low reaction efficiency and high bulkiness of polyacrylonitrile fibers

Active Publication Date: 2021-11-26
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fiber materials prepared by the above-mentioned patents still have the following deficiencies: due to the high bulkiness of polyacrylonitrile fibers, the functionalization reaction efficiency is relatively low, and the uniformity of functionalization reactions of polyacrylonitrile fibers is poor, resulting in relatively low adsorption capacity for seawater uranium. Small, low uranium extraction efficiency

Method used

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  • Amino and amidoxime polyacrylonitrile nanofiber as well as preparation method and application thereof
  • Amino and amidoxime polyacrylonitrile nanofiber as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0044] (1) Add 4.0 parts by weight of dry polyacrylonitrile powder to 21.0 parts by weight of dimethyl sulfoxide, stir at 50°C for 3 hours, and prepare polyacrylonitrile solution I; add 16.0 parts by weight of triethylenetetramine to 21.0 parts by weight of dimethyl sulfoxide, stirred for 1 h, and prepared as triethylene tetramine solution; mixed the above polyacrylonitrile solution I and triethylene tetramine solution, stirred and reacted at 110 ° C for 4 h, and obtained aminopolypropylene Nitrile spinning solution;

[0045] (2) Add 4.0 parts by weight of polyacrylonitrile powder to 23.0 parts by weight of dimethyl sulfoxide, stir at 50°C for 3 hours, and prepare polyacrylonitrile solution II; add 2.0 parts by weight of hydroxylamine hydrochloride to 23.0 parts by weight of In methyl sulfoxide, stir at 70°C for 2 hours to prepare hydroxylamine hydrochloride solution; mix the above polyacrylonitrile solution II and hydroxylamine hydrochloride solution, then add 1.5 parts by we...

Embodiment 2

[0048] (1) Add 4.0 parts by weight of dry polyacrylonitrile powder to 15.0 parts by weight of dimethylformamide, stir at 70°C for 1 hour, and prepare polyacrylonitrile solution I; add 10.0 parts by weight of tetraethylenepentamine to 15.0 parts by weight of dimethyl sulfoxide, stirred for 2 hours, and prepared into tetraethylenepentamine solution; mixed the above-mentioned polyacrylonitrile solution I and tetraethylenepentamine solution, stirred and reacted at 120°C for 2 hours, and obtained amino-based polypropylene Nitrile spinning solution;

[0049] (2) Add 3.0 parts by weight of polyacrylonitrile powder to 20.0 parts by weight of dimethylformamide, stir at 50°C for 2 hours, and prepare polyacrylonitrile solution II; add 2.0 parts by weight of hydroxylamine hydrochloride to 20.0 parts by weight of In methyl sulfoxide, stir at 75°C for 1 hour to prepare hydroxylamine hydrochloride solution; mix the above polyacrylonitrile solution II and hydroxylamine hydrochloride solution,...

Embodiment 3

[0052] (1) Add 4.5 parts by weight of dry polyacrylonitrile powder to 20.0 parts by weight of dimethyl sulfoxide, stir at 50°C for 2 hours, and prepare polyacrylonitrile solution I; add 17.0 parts by weight of triethylenetetramine to 20.0 parts by weight of dimethyl sulfoxide, stirred for 2 hours, and prepared as a triethylenetetramine solution; mixed the above-mentioned polyacrylonitrile solution I and triethylenetetramine solution, stirred and reacted at 120°C for 2 hours, and obtained aminopolypropylene Nitrile spinning solution;

[0053] (2) Add 4.5 parts by weight of polyacrylonitrile powder to 23.5 parts by weight of dimethyl sulfoxide, stir at 70°C for 1 hour, and prepare polyacrylonitrile solution II; add 2.5 parts by weight of hydroxylamine hydrochloride to 23.5 parts by weight of In methyl sulfoxide, stir at 80°C for 1 hour to prepare hydroxylamine hydrochloride solution; mix the above polyacrylonitrile solution II and hydroxylamine hydrochloride solution, then add 1...

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Abstract

The invention discloses amino and amidoxime polyacrylonitrile nanofiber as well as a preparation method and application thereof. The preparation method comprises the following steps of (1) mixing a polyacrylonitrile solution I and a polyamine solution containing two or more ethylidenes, and reacting at 100-120 DEG C for 1.5-5 hours to obtain an amino polyacrylonitrile spinning solution; (2) mixing a polyacrylonitrile solution II and a hydroxylamine hydrochloride solution, adding carbonate, reacting at 65-85 DEG C for 20-40 hours, performing cooling, performing centrifuging, and taking a supernate to obtain an amidoxime polyacrylonitrile spinning solution; and (3) carrying out electrostatic spinning on the amino polyacrylonitrile spinning solution obtained in the step (1) and the amidoxime polyacrylonitrile spinning solution obtained in the step (2) by adopting a double-nozzle electrostatic spinning machine, and performing drying to obtain the amino and amidoxime polyacrylonitrile nanofiber. The amino and amidoxime polyacrylonitrile nanofiber prepared by the preparation method disclosed by the invention can be used for extracting uranium from seawater, and has high uranium adsorption capacity.

Description

technical field [0001] The invention relates to an amino-based and amidoxime-based polyacrylonitrile nanofiber, a preparation method and application thereof. Background technique [0002] Natural uranium is not only the raw material for the nuclear charge of nuclear weapons, but also nuclear power fuel. The grade of uranium in uranium ore resources is low, the deposit scale is small, and the composition of rock minerals is complex. The difficulty and cost of uranium leaching and recovery technology are increasing with the continuous development of resources. The contradiction between the supply and demand of natural uranium in my country is becoming more and more serious year by year, and the gap still needs to be ensured by overseas development and international market procurement. From the perspective of long-term development, exploring and exploiting unconventional uranium resources will be an inevitable choice. [0003] Among the unconventional uranium resources, seawa...

Claims

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Application Information

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IPC IPC(8): D01F8/08B01J20/26B01J20/28B01J20/30
CPCD01F8/08B01J20/261B01J20/28023B01J20/28007Y02P10/20
Inventor 宋艳陈树森宿延涛王凤菊常华李子明
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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