Shrinkage-resistant antibacterial nano composite fiber material for extracting uranium from seawater and preparation method of shrinkage-resistant antibacterial nano composite fiber material

A nanocomposite fiber, anti-shrinkage technology, applied in seawater treatment, chemical instruments and methods, water pollutants, etc., can solve the problems of unstable structure, easy shrinkage and antibacterial effect, and achieve improved shrinkage and degradation, significant antibacterial and antibacterial effects Anti-biofilm activity, simple process effect

Active Publication Date: 2020-02-28
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides an anti-shrinkage antibacterial nanocomposite fiber material for extracting uranium from seawater, which solves the problems of unstable structure, easy shrinkage and poor antibacterial effect existing in existing uranium extraction materials

Method used

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  • Shrinkage-resistant antibacterial nano composite fiber material for extracting uranium from seawater and preparation method of shrinkage-resistant antibacterial nano composite fiber material
  • Shrinkage-resistant antibacterial nano composite fiber material for extracting uranium from seawater and preparation method of shrinkage-resistant antibacterial nano composite fiber material
  • Shrinkage-resistant antibacterial nano composite fiber material for extracting uranium from seawater and preparation method of shrinkage-resistant antibacterial nano composite fiber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Synthesis of methoxypolyethylene glycol-b-polyarginine diblock copolymer (PPLA)

[0023] As shown in formula 1, dissolve 2.96g of N(ε)-benzyloxycarbonyl-L-ornithine-N-carboxylic acid internal anhydride in 50mL of dry chloroform, add 1.0g of dry methoxypolyethylene glycol amine, After stirring and reacting for 3 days in an oil bath at 37°C under nitrogen protection, directly settle with ether or drain the N,N-dimethylformamide under reduced pressure. Dissolve the solid in chloroform and then settle with ether, and filter with suction. After drying under reduced pressure, the protective group was removed by trifluoroacetic acid / 33% w / w hydrogen bromide acetic acid solution (3:7v / v) to obtain methoxypolyethylene glycol-polyornithine diblock copolymer Things. Dissolve 1g of the above-mentioned diblock copolymer in 20mL of deionized water, adjust the pH to 9.0 with hydrochloric acid and sodium hydroxide aqueous solution, and then add 2.5g of 3,5-dimethyl-1-pyrazolec...

Embodiment 2

[0025] Example 2: Synthesis of polypropylene amidoxime (AOP) spinning precursor solution

[0026] As shown in formula 2, dissolve 8.5g hydroxylamine hydrochloride in 41mL DMF, add 4.6g sodium hydroxide at room temperature and stir for 4h, then add 5.0g polyacrylonitrile (PAN) to the mixed solution, stir mechanically at room temperature for 30min, and stir at 68℃ for reaction 12h. Then, it was centrifuged at 11000 rpm for 30 minutes to obtain the supernatant, which was the polypropylene amidoxime (AOP) spinning precursor solution.

[0027] Synthesis process of polypropylene amidoxime (AOP, structure is PAO or PIDO)

[0028]

Embodiment 3

[0029] Example 3: Air-spun nanocomposite fiber (AOP / PPLA, AP x ) Preparation

[0030] Take 1g of the methoxy polyethylene glycol-b-polyarginine diblock copolymer (PPLA) prepared in Example 1, and add it at a mass concentration ratio of 15% (weight of PPLA / weight of AOP precursor solution). The 6.67 g of the polypropylene amidoxime spinning precursor solution (AOP weight / AOP precursor solution weight = 18.5%) obtained in the preparation of Example 2 was magnetically stirred and dissolved to obtain a spinning precursor mixed solution. Inject the spinning precursor mixed solution into the syringe and perform air spinning according to the following spinning parameter settings to obtain nanocomposite fiber AP x . The specific spinning operation is: an air compressor equipped with a silica gel drying tube provides dry compressed air, a syringe filled with spinning solution uses a 30G needle, and a 20kPa wind pressure and a 1mL / h advancing speed push the solution to blow the fiber , Th...

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Abstract

The invention discloses a preparation method of a shrinkage-resistant antibacterial nano composite fiber material for extracting uranium from seawater. The shrinkage-resistant antibacterial nano composite fiber material for extracting the uranium from the seawater is prepared by blending a methoxypolyethylene glycol-b-polyarginine diblock copolymer with the mass concentration of 10-15% and a polypropylene amidoxime precursor solution with the mass concentration of 18.5%. In the method, an air spinning process is simple, and complicated equipment is not required. By the prepared nano compositefiber material, the strength of composite fibers is improved through electrostatic action, and shrinkage and degradation of amidoxime-based fibers are improved, thereby enhancing the stability and durability of the fibers in extracting the uranium from the seawater; the shrinkage-resistant antibacterial nano composite fiber material has remarkable antibacterial and anti-biofilm activity, the anti-biofouling performance of the fiber adsorption material in extraction of the uranium from the seawater is improved, and the adsorption sites are increased, so that the uranium adsorption capacity is improved.

Description

Technical field [0001] The invention relates to the field of functional fiber materials, in particular to an anti-shrinkage and antibacterial nano composite fiber material for extracting uranium from seawater and a preparation method thereof. Background technique [0002] At present, in the research of various uranium adsorbents, amidoxime-based chelating fibers show high efficiency and specificity for uranyl ions. Among them, the most common method used in the early stage is to directly amidoxim PAN fiber (acrylic fiber), but this amidoximation process will swell the PAN fiber and destroy its original aggregated structure. When it is slightly higher, the mechanical properties of the fiber will obviously decrease. [0003] In order to solve the problem that the mechanical properties of PAN fiber directly amidoximation decrease seriously, at the same time, it gives the fiber more kinds of chelating functional groups. Many scholars have done further research. For example, Chinese p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/12D01F8/10B01J20/26B01J20/28C02F1/28B01J20/30C02F101/20C02F103/08
CPCD01F8/12D01F8/10B01J20/264B01J20/261C02F1/285B01J20/28023C02F2103/08C02F2101/20
Inventor 吴锡龙李真于智群吴云娣王宁
Owner HAINAN UNIVERSITY
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