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Preparation method of meta-aramid nano-nets fiber membrane

A technology of fiber membrane and aramid fiber, which is applied in the field of preparation of meta-aramid nano-spider fiber membrane, which can solve the problems of thick fiber diameter and material application performance limitations, and achieve the effects of small fiber diameter, good fire resistance and small pore size

Inactive Publication Date: 2012-10-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Yao Lirong et al. (Application No.: 201010166400, Publication No.: CN101838888A) of Zhangjiagang Naier Nanotechnology Co., Ltd. provided a method for preparing electrospun meta-aramid nanofibers, but the diameter of the prepared nanofibers was 50nm to 5um, and the fiber The diameter is relatively thick, and the application performance of the material is greatly limited

Method used

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  • Preparation method of meta-aramid nano-nets fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Lithium chloride is selected as the halogen salt; N, N-dimethylacetamide is selected as the organic solvent. Specific steps are as follows:

[0017] Step 1: Dissolve 0.1g of lithium chloride in 18.9g of N,N-dimethylacetamide at a room temperature of 25°C to prepare an ionic liquid solvent system;

[0018] Step 2: Add 1 g of meta-aramid to the ionic liquid solvent system obtained in the first step, stir with a stirrer until the meta-aramid is completely dissolved, and the mass fractions of meta-aramid and lithium chloride are respectively 5 %, 0.5% meta-aramid electrospinning raw materials;

[0019] Step 3: Under the condition of humidity of 35%, add the meta-aramid electrospinning raw material obtained in the second step into the electrospinning device, and the static voltage is 20kV, the flow rate of the syringe pump is 0.1mL / h, and the fiber is received Electrospinning is carried out under the condition of a distance of 8 cm to obtain a meta-aramid nano-spider web f...

Embodiment 2

[0021] The halogen salt is a mixture of calcium chloride and sodium chloride; the organic solvent is N,N-dimethylformamide. Specific steps are as follows:

[0022] Step 1: Add 0.8g of calcium chloride and sodium chloride (mass ratio 1:1) mixed halogen salt into 17.2g of N,N-dimethylformamide at room temperature of 25°C to prepare an ionic liquid solvent system;

[0023] The second step: add 2g of meta-aramid to the ionic liquid solvent system obtained in the first step, stir with a stirrer until the meta-aramid is completely dissolved, and obtain a mixed halide of meta-aramid, calcium chloride and sodium chloride The mass fraction of salt is respectively 10% and 4% meta-aramid electrospinning raw materials;

[0024] Step 3: Under the condition of 30% humidity, add the meta-aramid electrospinning raw material obtained in the second step into the electrospinning device. The electrostatic voltage is 30kV, the flow rate of the syringe pump is 1mL / h, and the fiber receives Elect...

Embodiment 3

[0026] The halogen salt is a mixture of lithium chloride and ferric chloride; the organic solvent is N-methylpyrrolidone. Specific steps are as follows:

[0027] Step 1: Add 1.2g of lithium chloride and ferric chloride (mass ratio 2:1) into 15.8g of N-methylpyrrolidone to dissolve at a room temperature of 25°C to prepare an ionic liquid solvent system;

[0028] The second step: add 3g of meta-aramid to the ionic liquid solvent system obtained in the first step, stir with a stirrer until the meta-aramid is completely dissolved, and obtain a mixed halide of meta-aramid, lithium chloride and ferric chloride The mass fraction of salt is respectively 15% and 6% meta-aramid electrospinning raw materials;

[0029] Step 3: Add the meta-aramid electrospinning raw material obtained in the second step to the electrospinning device under the condition of a humidity of 25%. When the static voltage is 45kV, the flow rate of the syringe pump is 2mL / h, and the fiber receives Electrospinning...

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Abstract

The invention discloses a preparation method of meta-aramid nano-nets fiber membranes, which comprises the steps that meta-aramid is dissolved in halons and then mixed with organic solvent, thereby obtaining meta-aramid electrospinning material from the prepared ionic liquid solvent system; and the meta-aramid electrospinning material is put into an electrospinning device for electrospinning, thereby obtaining the meta-aramid nano-nets fiber membrane. The preparation method has the advantages that the process of the preparation method is simple, and the prepared meta-aramid nano-nets fiber membrane has smaller fiber diameter, larger specific surface area, smaller bore diameter and higher porosity than the fibers of the common electrospinning fiber membrane, has outstanding high temperature resistance and fire retardancy and good dimensional stability of meta-aramid, and can be widely used in the fields of high temperature filtration, protection, battery isolation membranes, sensing, biomedicine, etc.

Description

technical field [0001] The invention relates to a method for preparing a meta-aramid nano-spider web fiber membrane, which belongs to the technical field of nano-materials. Background technique [0002] As a method that can directly and continuously prepare polymer nanofibers, electrospinning has attracted extensive attention from researchers at home and abroad. The fiber diameter distribution obtained by electrospinning is generally between a few nanometers and a few microns. The membrane material composed of these fibers has the characteristics of large specific surface area, small fiber membrane pore size, high porosity and good fiber continuity. Information, energy, environment, biomedicine and other fields have a wide range of application potential. The application performance of the material is largely determined by the diameter of the electrospun fiber. The smaller the diameter of the fiber, especially when the average fiber diameter is less than 20nm, the applicatio...

Claims

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Application Information

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IPC IPC(8): D01F6/60D01D5/00
Inventor 丁彬王晓茹王先锋俞建勇孙刚
Owner DONGHUA UNIV
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