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A preparation method of coated polysulfide electrospun nanofiber membrane and its application in the adsorption of metal ions in response to oxidative stimuli

A nanofiber membrane and electrospinning technology, applied in the field of materials, can solve the problems of waste of resources, pollution, low utilization rate of sulfur, etc., and achieve the effects of clear structure, high safety, and easy recovery and recycling.

Active Publication Date: 2020-08-07
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional sulfur-containing material production industry will produce a large amount of sulfur waste, the utilization rate of sulfur is not high, and the waste sulfur is usually discharged to nature, causing serious resource waste and environmental pollution problems

Method used

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  • A preparation method of coated polysulfide electrospun nanofiber membrane and its application in the adsorption of metal ions in response to oxidative stimuli
  • A preparation method of coated polysulfide electrospun nanofiber membrane and its application in the adsorption of metal ions in response to oxidative stimuli
  • A preparation method of coated polysulfide electrospun nanofiber membrane and its application in the adsorption of metal ions in response to oxidative stimuli

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Add 0.64g PVDF to a 10mL serum bottle, add 5mL DMAc solvent, stir fully until PVDF is completely dissolved to obtain a PVDF solution with a concentration of 12wt.%; add Psf. (polysulfide) 64mg to another serum bottle, add 2mL DCM to make Psf. Completely dissolved to obtain a brownish-red clear and transparent solution. The Psf. solution was slowly added dropwise to the PVDF solution under rapid stirring. Initially, Psf. was precipitated in the PVDF solution. Stir thoroughly overnight until Psf. was completely dissolved, and the mixed solution was clear and transparent to obtain a mixed spinning solution.

[0026] (2) The mixed spinning solution obtained in step (1) is added to a 15mL dispensing syringe, clamped to the electrospinning machine equipment, and a layer of receiving aluminum foil is attached to the collecting drum, and the distance between the drum and the needle is adjusted to 10cm, and the spinning voltage is set. Spinning at 12kV and a feed rate of 1mL...

Embodiment 2

[0030] (1) Add 0.82g PVDF to a 10mL serum bottle, add 5mL DMAc solvent, stir well until PVDF is completely dissolved to obtain a PVDF solution with a concentration of 15wt.%; add Psf.164mg to another serum bottle, add 2mL DCM to completely dissolve Psf. A brown-red clear and transparent solution was obtained. The Psf. solution was slowly added dropwise to the PVDF solution under rapid stirring. Initially, Psf. was precipitated in the PVDF solution. Stir thoroughly overnight until Psf. was completely dissolved, and the mixed solution was clear and transparent to obtain a mixed spinning solution.

[0031] (2) The mixed spinning solution obtained in step (1) is added to a 15mL dispensing syringe, clamped to the electrospinning machine equipment, and a layer of receiving aluminum foil is attached to the collecting drum, and the distance between the drum and the needle is adjusted to 12cm, and the spinning voltage is set. Spinning at 15kV and a feed rate of 2mL / h. After spinning, t...

Embodiment 3

[0034] (1) Add 1.03g PVDF to a 10mL serum bottle, add 5mL DMAc solvent, stir until PVDF is completely dissolved to obtain a PVDF solution with a concentration of 18wt.%; add 309mg of Psf. to another serum bottle, and add 2mL DCM to completely dissolve Psf. A brown-red clear and transparent solution was obtained. The Psf. solution was slowly added dropwise to the PVDF solution under rapid stirring. Initially, Psf. was precipitated in the PVDF solution. Stir thoroughly overnight until Psf. was completely dissolved, and the mixed solution was clear and transparent to obtain a mixed spinning solution.

[0035] (2) The mixed spinning solution obtained in step (1) is added to a 15mL dispensing syringe, clamped to the electrospinning machine equipment, and a layer of receiving aluminum foil is attached to the collecting drum, and the distance between the drum and the needle is adjusted to 15cm, and the spinning voltage is set. Spinning at 18kV and a feed rate of 3mL / h. After spinning...

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Abstract

The invention discloses a preparation method of a polysulfide-coated electrostatic spinning nanofiber membrane and application of the polysulfide-coated electrostatic spinning nanofiber membrane in absorption of metal ions under oxidation stimulation respondence. A polysulfide is dissolved into methylene dichloride to obtain a polysulfide solution, the polysulfide solution is dropped into a polyvinylidene fluoride solution to form a homogeneous phase mixed spinning solution, and then the polysulfide-coated electrostatic spinning nanofiber membrane is prepared by using an electrostatic spinningmethod. The adsorbing capacity of the membrane to the metal ions can remarkably improved, and the membrane has selective adsorption to special metals.

Description

technical field [0001] The invention relates to the field of materials, in particular to a preparation method of coated polysulfide electrospun nanofiber membrane and its application in absorbing metal ions in response to oxidative stimulation. Background technique [0002] Elemental sulfur is a substance with abundant reserves on the earth, and its annual output is huge. Its main uses are the production of sulfuric acid and various sulfides and rubber vulcanizing agents in the synthetic rubber industry (such as the production of tires). However, the traditional sulfur-containing material production industry will produce a large amount of sulfur waste, the utilization rate of sulfur is not high, and the waste sulfur is usually discharged to nature, causing serious resource waste and environmental pollution. How to use a large amount of sulfur to turn waste into treasure has always been a difficult point. The invention patent CN201510207935.1 applied by the inventor earlier ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4382D04H1/728D01D5/00B01J20/26B01J20/30B01J20/28C02F1/28C02F101/20
CPCB01J20/261B01J20/28038C02F1/285C02F2101/20D01D5/003D01D5/0076D01D5/0092D04H1/4382D04H1/728
Inventor 许凯桂雪峰刘凌利高树曦孙龙凤陈鸣才
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI