Preparation and application of graphene composite fiber nonwoven fabric for catalytically degrading neuropathic chemical warfare agents

A graphene fiber and graphene composite technology, applied in the field of chemical defense, can solve the problem of low utilization of MOFs catalysts, and achieve the effect of improving catalytic degradation efficiency

Active Publication Date: 2020-05-22
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to overcome the complicated preparation process of high-efficiency chemical protection materials and the low utilization rate of MOFs catalysts in the composite system, so as to achieve the purpose of rapidly catalytically degrading neurochemical warfare agents, the invention provides an ultra-fast catalytic degradation neurochemical warfare agent The preparation method and application of the graphene composite fiber non-woven fabric is characterized in that the MOFs catalyst is grown on the surface of the graphene fiber with excellent light-to-heat conversion performance in situ to form a graphene composite fiber non-woven fabric with rapid digestion

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Preparation and application of graphene composite fiber nonwoven fabric for catalytically degrading neuropathic chemical warfare agents
  • Preparation and application of graphene composite fiber nonwoven fabric for catalytically degrading neuropathic chemical warfare agents
  • Preparation and application of graphene composite fiber nonwoven fabric for catalytically degrading neuropathic chemical warfare agents

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Effect test

Embodiment 1

[0040] (1) Preparation of graphene fiber non-woven fabric: the graphene oxide aqueous dispersion with a concentration of 5mg / mL is the spinning stock solution, and the KOH solution of 5wt% is the coagulation bath, and continuous wet spinning is carried out to obtain graphene oxide The fibers were left to stand at room temperature for 8 hours, and then vacuum-dried at 60°C for 2 hours; the above-mentioned dried fibers were dispersed in an aqueous ethanol dispersion (volume ratio 3:1), and crushed into short fibers using a high-speed shear mixer. Obtain the short fiber dispersion liquid, vacuum filter, dry at room temperature, obtain graphene oxide fiber non-woven fabric, select hydroiodic acid to make graphene fiber non-woven fabric by its partial reduction, the diameter of graphene fiber non-woven fabric fiber is 20 μm , the reaction time is 6h, the mass ratio of graphene oxide fiber non-woven fabric to hydroiodic acid is 1:1.

[0041] (2) Preparation of composite fiber fabric...

Embodiment 2

[0044] (1) Preparation of graphene fiber non-woven fabrics: the graphene oxide aqueous dispersion with a concentration of 30mg / mL is the spinning stock solution, and the mixed solution of 15wt% KOH and NaOH is the coagulation bath, which is continuously wet-spun to obtain Graphene oxide fibers were left standing at room temperature for 24 hours, and then vacuum-dried at 100°C for 24 hours; the above-mentioned dried fibers were dispersed in aqueous ethanol solution (volume ratio 1:1), and crushed into short fibers using a high-speed shear mixer , to obtain the short fiber dispersion, vacuum filtration, and drying at room temperature to obtain a graphene oxide fiber non-woven fabric, select hydrazine hydrate to partially reduce it to obtain a graphene fiber non-woven fabric, the diameter of the graphene fiber non-woven fabric fiber is 100 μm, The reaction time is 10 hours, and the mass ratio of graphene oxide fiber nonwoven fabric to hydrazine hydrate is 1:1.

[0045] (2) Prepar...

Embodiment 3

[0048] (1) Preparation of graphene fiber non-woven fabric: the graphene oxide aqueous dispersion with a concentration of 20mg / mL is the spinning stock solution, and 10wt% CaCl 2 The solution is a coagulation bath, and continuous wet spinning is used to prepare graphene oxide fibers, which are left at room temperature for 12 hours, and then vacuum-dried at 60°C for 6 hours; the dried fibers are dispersed in an aqueous ethanol solution (volume ratio 1:3), Use a high-speed shear mixer to crush it into short fibers to obtain a dispersion of short fibers, vacuum filter, and dry at room temperature to obtain a graphene oxide fiber non-woven fabric, which is partially reduced with ascorbic acid to obtain a graphene fiber non-woven fabric , the diameter of the graphene fiber non-woven fabric fiber is 80 μm, the reaction time is 8 h, and the mass ratio of the graphene oxide fiber non-woven fabric to hydrazine hydrate is 1:1. The X-ray diffraction spectrum of prepared graphene fiber is ...

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Abstract

The invention discloses preparation and application of a graphene composite fiber nonwoven fabric for catalytically degrading neuropathic chemical warfare agents, and belongs to the field of chemicalprevention. MOFs (Metal Organic Frameworks) nanoparticles are synthesized on the surface of fibers by a solvothermal method by using graphene fibers as carriers, wherein the diameter of the graphene fibers is 20 to 100 [mu]m; an MOFs catalyst is UiO-66-NH2; the particle dimension is 50 to 400 nm; and the composite fiber nonwoven fabric is graphene@UiO-66-NH2, and the thickness is 50 to 300 [mu]m.The graphene composite fiber nonwoven fabric is prepared through wet spinning and subsequent vacuum suction filtration, and has an efficient photothermal conversion effect. Under the condition of simulated sunlight, the catalytic degradation half-life period of the graphene@UiO-66-NH2 on an optimum analog of methyl paraoxon of a nerve poison of GD is 1.6 min; complete degradation can be almost realized within 20 min; and excellent capability of fast and catalytically degrading the neuropathic chemical warfare agents is shown.

Description

Technical field: [0001] The invention relates to a preparation method and application of a graphene composite fiber non-woven fabric with a photothermal enhancement effect that catalyzes and degrades neural chemical warfare agents ultra-fast, and belongs to the field of chemical defense. Background technique: [0002] Highly toxic neurochemical warfare agents (Chemical Warfare Agents, CWAs) containing phosphate bonds, such as Tabun (GA), Sarin (GB), Soman (GD) and Viex (VX), are characterized by Strong toxicity, quick action, can produce poisonous effect to human body through contact or inhalation. Although the use of chemical weapons has been banned internationally, a large number of chemical weapons are still being prepared and become a global threat. At present, the use of activated carbon as an intermediate layer or coating for material adsorption of chemical warfare agents is the main protection strategy. For example, Chinese patent document CN107584824A discloses a m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/37B01J31/22B01J35/06A62D3/17A62D101/02A62D101/26D06M101/40
CPCA62D3/17A62D2101/02A62D2101/26B01J31/1691B01J31/2239B01J35/004B01J35/06B01J2531/48D06M15/37D06M2101/40
Inventor 杨冬芝宋林娜王雪娇于中振
Owner BEIJING UNIV OF CHEM TECH
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