Method for preparing aromatic polyamide fiber paper base material by electrospinning technology

An electrospinning technology and aramid fiber technology are applied in the field of preparing aramid fiber paper-based materials by using electrospinning technology, which can solve the problems of low forming strength, difficulty in guaranteeing hot-pressing performance, and restricting the development of large-scale development. Good mechanical properties and heat resistance, simple process and high efficiency

Inactive Publication Date: 2013-04-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional papermaking method adopts the methods of mixing aramid fiber slurry, inclined wire (rotary wire) forming, pressing, drying, and high-temperature calendering to prepare aramid fiber paper. The prepared aramid fiber paper has poor fiber dispersion and poor forming strength. Problems such as low paper quality, poor paper uniformity, difficulty in guaranteeing hot-pressing performance, and strict requirements for papermaking performance have restricted its large-scale development.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Take 53ml of dimethylacetamide (DMAc) and 2g of anhydrous lithium chloride in an Erlenmeyer flask, seal it and place it in an oil bath, stir at 80℃ for about 20 minutes and then dissolve the lithium chloride, add accurately Good 2.5g aramid fiber pulp, after sealing, stir for 2h at 80℃, the pulp will swell and dissolve to form a uniform translucent light yellow solution. After taking it out, let it stand for 30min at room temperature, fully swell and dissolve to remove bubbles. Uniform and transparent 5% aramid fiber solution.

[0023] 2. Electrospin the prepared aramid fiber solution under high pressure. The electrospinning conditions are: voltage 18kv, spinning dope advancing speed 0.1ml / h, temperature 30℃, relative humidity 20%, rotation speed 4.8 r / min, the receiving distance is 8cm, and the receiving device of the electrostatic spinning device is a flat plate collection.

[0024] 3. The aramid fiber membrane was immersed in deionized water for 2 hours and dried at 8...

Embodiment 2

[0026] 1. Take 53ml of dimethylacetamide (DMAc) and 3.5g of anhydrous lithium chloride in an Erlenmeyer flask, seal it and place it in an oil bath, stir at 80℃ for about 20 minutes and then dissolve the lithium chloride. Add it accurately Weighed 5g aramid fiber pulp, sealed and stirred at 80℃ for 2h, the pulp swelled and dissolved to form a uniform translucent light yellow solution. After taking it out, let it stand at room temperature for 45 minutes, fully swelled and dissolved to remove bubbles. Uniform and transparent 10% aramid fiber solution.

[0027] 2. Electrospin the prepared aramid fiber solution under high pressure. The electrospinning conditions are: voltage 24kv, spinning solution advancing speed 0.7ml / h, temperature 35℃, relative humidity 25%, speed 5.2 r / min, the receiving distance is 10cm, and the receiving device of the electrostatic spinning device is roller collection.

[0028] 3. The aramid fiber membrane was immersed in deionized water for 2 hours and dried at...

Embodiment 3

[0030] 1. Take 53ml of dimethylacetamide (DMAc) and 5g of anhydrous lithium chloride in an Erlenmeyer flask, seal it and place it in an oil bath, stir at 80°C for about 20 minutes and then dissolve the lithium chloride, add accurately Good 7.5g aramid fiber pulp, sealed and stirred at 80℃ for 2h, the pulp swells and dissolves to form a uniform translucent light yellow solution. After taking it out, let it stand for 60min at room temperature, fully swelling and dissolving to remove air bubbles. Uniform transparent 15% aramid fiber solution.

[0031] 2. Electrospin the prepared aramid fiber solution under high pressure. The electrospinning conditions are: voltage 30kv, spinning solution advancing speed 1.2ml / h, temperature 40℃, relative humidity 30%, rotation speed 6.2 r / min, the receiving distance is 12cm, and the receiving device of the electrostatic spinning device is roller collection.

[0032] 3. The aramid fiber membrane was immersed in deionized water for 2 hours and dried at...

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Abstract

The invention discloses a method for preparing an aromatic polyamide fiber paper base material by an electrospinning technology and belongs to the preparing field of aramid fiber papers. The method for preparing the aromatic polyamide fiber paper comprises the steps that (1), an aromatic polyamide fiber spinning solution is prepared; (2), the aromatic polyamide fiber spinning solution is sprayed under high-pressure spinning to form an aromatic polyamide fiber film; and (3), the aromatic polyamide fiber film is subjected to water bath, drying, then high temperature press polish treatment and hot press molding, so that the aromatic polyamide fiber paper base material is formed. Aromatic polyamide fiber paper base materials prepared by traditional paper making methods have the problems that the fiber dispersing performance is poor, the forming strength is low, the paper uniformity is bad, the hot press performance can not be guaranteed, the requirement for papermaking performance is strict, so that the large-scale development of the aromatic polyamide fiber paper base materials is restricted. However, according to the aromatic polyamide fiber paper base material prepared by the method of spinning the aromatic polyamide fiber spinning solution by high-pressure multiple nozzles, the operation is simple and easy to implement, and the prepared aromatic polyamide fiber paper base material has excellent performance and more stable nature.

Description

Technical field [0001] The invention belongs to the field of preparation of aramid paper, and particularly relates to a method for preparing aramid fiber paper-based materials by using electrostatic spinning technology. Background technique [0002] With the development of material science and the advancement of papermaking technology, in addition to traditional plant fibers, paper-making raw materials have begun to use other organic synthetic fibers to make paper-based materials. Aramid fiber has high strength, high temperature resistance, chemical corrosion resistance, flame retardant and excellent electrical insulation properties, and has excellent wet processing properties and reinforcement properties, so it can be used to manufacture special functional materials. Aramid fiber paper, also called poly-m-aramid paper, is a special functional material made of pure aramid fiber (poly-m-phenylene isophthalamide), suitable for harsh environments such as high temperature and high hu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/26
Inventor 杨仁党余梦娇杨飞刘德桃
Owner SOUTH CHINA UNIV OF TECH
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