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Aromatic polyamide nanofiber and fiber structure containing the same

An aramid and nanofiber technology, which is applied in the direction of single-component polyamide rayon filament, single-component copolyamide rayon filament, nanotechnology, etc. collectors etc.

Active Publication Date: 2010-09-08
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of nanofibers formed by electrospinning from a spinning solution containing an alkali metal salt, it is preferable to reduce the ionic contamination of the alkali metal salt as much as possible in the use of filters for gas and liquid filtration, and electronic material parts, Therefore, the methods described in the above documents are difficult to apply to the above purposes
[0009] In addition, electrospinning obtained from a spinning solution containing the above-mentioned alkali metal salt has the problem that it is difficult to uniformly laminate on the collector (collector).

Method used

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  • Aromatic polyamide nanofiber and fiber structure containing the same
  • Aromatic polyamide nanofiber and fiber structure containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The aromatic polyamide polymer of the present invention is produced by the interfacial polymerization method based on the method described in JP-A-47-10863 as follows.

[0057] 25.13 g (99 mol%) of isophthaloyl chloride and 0.25 g (1 mol%) of terephthaloyl chloride were dissolved in 125 ml of tetrahydrofuran with a water content of 2 mg / 100 ml, and cooled to -25°C. While stirring, a solution obtained by dissolving 13.52 g (100 mol%) of m-phenylenediamine in 125 ml of the aforementioned tetrahydrofuran was added as a thin stream over about 15 minutes to prepare a white emulsion (A). Separately, 13.25 g of anhydrous sodium carbonate was dissolved in 250 ml of water at room temperature, and cooled to 5° C. while stirring to precipitate sodium carbonate hydrate crystals to prepare a dispersion (B). The above emulsion (A) and dispersion (B) were vigorously mixed. After mixing was continued for another 2 minutes, 200 ml of water was added for dilution and the resulting polym...

Embodiment 2～5

[0061] In the same manufacturing method as in Example 1, the same operation as in Example 1 was performed except that the addition ratio of the third component was changed as described in Table 1. The results are shown in Table 1.

Embodiment 6、7

[0063] According to the same production method as in Example 1, except that the addition rate of terephthaloyl dichloride and the laminated fiber structure (laminated fiber structure) were changed as described in Table 1, proceed and implement Example 1 is the same operation. The results are shown in Table 1.

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Abstract

According to the invention, by preparing a solution of an aromatic copolyamide obtained by copolymerization of a specific third component, a spinning solution is stabilized even without using an alkali metal salt and a uniform aromatic copolyamide nanofiber can be obtained stably by an electrospinning method. Further, according to the invention, a fiber structure obtaining laminating a salt-free aromatic copolyamide nanofiber can be stably formed. Therefore, it can be applied to a product having no preference for ionic contamination of an alkali metal salt or the like, for example, a filter for gas or liquid filtration or an electronic component separator, and is useful in the textile industry.

Description

technical field [0001] The present invention relates to aramid nanofibers and a fiber structure in which the nanofibers are laminated. More specifically, it relates to an aramid nanofiber obtained by copolymerizing a second unit different from a repeating structural unit constituting a main skeleton of a polymer, and a fiber structure in which the nanofiber is laminated. The three components are aromatic diamines or aromatic diacyl halides, which improve the stability of the spinning solution, and are suitable for production from the spinning solution by electrospinning. [0002] In addition, the present invention relates to a filter for gas and liquid filtration and a separator for electronic components using the aramid. Background technique [0003] As the means of forming nanofibers, there are melt-blowing method, sea-island mixed spinning fiber method, electrospinning method, etc., wherein the electrospinning method is a known technology around the 1930s, and can obtain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/80D01F6/60D04H1/42D04H1/72H01M50/423
CPCB01D2239/025B01D39/1623D01F6/805D04H1/72D04H1/42D01D5/0038H01M2/162D04H1/4342Y10T428/298Y10T442/3065Y10T442/425Y10T442/608Y02E60/10H01M50/44D04H1/43838H01M50/423D01F6/60B82Y40/00
Inventor A·嘉数
Owner TEIJIN LTD
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