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Preparation method of flexible MgAl2O4 nanofiber membrane for chemical warfare agent digestion

A nanofiber membrane, chemical warfare agent technology, applied in heating/cooling fabrics, rayon of inorganic raw materials, textiles and papermaking, etc., can solve the problems of poor fiber continuity, many single fiber defects, and brittle fiber membranes. Achieve the effect of improving catalytic activity, improving viscoelasticity and spinnability, and high productivity

Active Publication Date: 2021-10-15
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of this invention is to provide a kind of flexible MgAl for chemical warfare agent digestion 2 o 4 The preparation method of the nanofiber membrane solves the problems of the prior art that high molecular polymer needs to be added in the preparation process, the fiber continuity is poor, the single fiber has many defects, and the fiber membrane is easy to be broken. Flexible MgAl for Degradation of Chemical Warfare Agents with Good Structural Stability 2 o 4 nanofiber membrane

Method used

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  • Preparation method of flexible MgAl2O4 nanofiber membrane for chemical warfare agent digestion
  • Preparation method of flexible MgAl2O4 nanofiber membrane for chemical warfare agent digestion
  • Preparation method of flexible MgAl2O4 nanofiber membrane for chemical warfare agent digestion

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Effect test

Embodiment 1

[0028] A flexible MgAl for chemical warfare agent digestion 2 o 4 The preparation method of nanofibrous film, concrete steps are:

[0029] (1) Dissolve the magnesium source anhydrous magnesium chloride, the aluminum source anhydrous aluminum chloride and the grain inhibitor tin tetrachloride in solvent water in sequence, first stir for 20 minutes, then add the inorganic gel thickener magnesium lithium silicate, and then Continue to stir for 60 minutes, wherein the molar ratio of magnesium source, aluminum source, grain inhibitor, and inorganic gel thickener in the solution is 1:2:0.04:0.16, and the quality of magnesium source and aluminum source and the ratio to the solvent are 10g : 30mL, mixed evenly to obtain a homogeneous and stable precursor solution with a dynamic viscosity of 8.7Pa·s and an electrical conductivity of 55.6mS / m.

[0030] (2) The above precursor solution is spun into a precursor fiber film by electrospinning technology, and the humidity in the spinning s...

Embodiment 2

[0035] A flexible MgAl for chemical warfare agent digestion 2 o 4 The preparation method of nanofibrous film, concrete steps are:

[0036] (1) Dissolve the magnesium source magnesium ethoxide, the aluminum source anhydrous aluminum chloride and the grain inhibitor methyl orthosilicate in the solvent ethanol in sequence, first stir for 30 minutes, then add the inorganic gel thickener sodium bentonite, and then Continue to stir for 50min, wherein the molar ratio of magnesium source, aluminum source, grain inhibitor and inorganic gel thickener in the solution is 1:2:0.05:0.28, and the ratio of magnesium source, aluminum source and mixed solvent is 10g:42mL , mixed uniformly to obtain a homogeneous and stable precursor solution with a dynamic viscosity of 8.1Pa s and an electrical conductivity of 46.5mS / m;

[0037] (2) The above precursor solution is spun into a precursor fiber film by electrospinning technology, and the humidity in the spinning interval is controlled to be 85% ...

Embodiment 3

[0041] A flexible MgAl for chemical warfare agent digestion 2 o 4 The preparation method of nanofibrous film, concrete steps are:

[0042] (1) Dissolve the magnesium source magnesium sulfate monohydrate, the aluminum source anhydrous aluminum chloride and the grain inhibitor zirconium acetate in the solvent glycerol in sequence, first stir for 35 minutes, then add the inorganic gel thickener diatomaceous earth , and then continue to stir for 75min, wherein the mol ratio of magnesium source, aluminum source, grain inhibitor, inorganic gel thickener in the solution is 1:2:0.06:0.12, the quality of magnesium source, aluminum source and the ratio with solvent 10g:40mL, mixed uniformly to obtain a uniform and stable precursor solution with a dynamic viscosity of 6.8Pa s and an electrical conductivity of 38.9mS / m;

[0043] (2) The above precursor solution is spun into a precursor fiber film by electrospinning technology, and the humidity in the spinning interval is controlled to b...

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Abstract

The invention relates to a preparation method of a flexible MgAl2O4 nanofiber membrane for chemical warfare agent digestion. The preparation method comprises the following steps of 1) sequentially dissolving a magnesium source, an aluminum source and a grain inhibitor in corresponding solvents, stirring, adding an inorganic gel thickener, and continuously stirring to obtain a precursor solution; 2) spinning the precursor solution into a precursor fiber membrane by adopting an electrostatic spinning technology; and 3), calcining the precursor fiber membrane in a nitrogen or argon atmosphere, and then continuously performing low-temperature thermal oxidation treatment in an air atmosphere, so that the flexible MgAl2O4 nanofiber membrane is obtained. The prepared MgAl2O4 fiber material is good in flexibility, good in fiber continuity and uniformity, high in chemical warfare agent digestion efficiency and wide in application prospect in the field of biochemical protection.

Description

technical field [0001] The invention belongs to the technical field of new materials, in particular to a kind of flexible MgAl used for chemical warfare agent digestion 2 o 4 Preparation method of nanofibrous membrane. Background technique [0002] As a weapon of mass destruction, chemical warfare agents have the characteristics of severe toxicity, fast action, long-lasting poisonous effect, wide range of damage, and difficulty in protection and treatment. They can cause fatal damage to humans, animals and plants in a short period of time. Commonly used chemical warfare agents include corrosive agents and nerve agents, among which mustard gas is the representative of corrosive agents, and the main nerve agents include tabun, sarin, soman, and Viex. Chemical warfare agents are not only capable of mass destruction, but also have the characteristics of being difficult to degrade and persisting in the environment for a long time. Therefore, it needs to be effectively degraded...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4209D04H1/4382D04H1/728D06C7/04D01F9/08
CPCD04H1/4209D04H1/43838D04H1/728D06C7/04D01F9/08
Inventor 单浩如傅秋霞刘其霞葛建龙张伟季涛高强张瑜
Owner NANTONG UNIVERSITY
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