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High-temperature heat-insulating flame-retardant fiber, fabric, preparation method and application

A flame-retardant fiber and high-temperature technology, which is applied in the field of preparation of heat-insulating flame-retardant fibers, can solve the problems of restricting the application of porous fibers and the inability to realize continuous large-scale preparation, and achieve excellent high-temperature heat insulation and flame-retardant properties, preparation method simple effect

Active Publication Date: 2020-07-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the traditional directional freezing method cannot achieve continuous large-scale preparation due to the limitation of its mold. For the occasions that require large-scale continuous preparation of porous fibers, this shortcoming severely limits the application of directional freezing method to prepare porous fibers.

Method used

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  • High-temperature heat-insulating flame-retardant fiber, fabric, preparation method and application
  • High-temperature heat-insulating flame-retardant fiber, fabric, preparation method and application
  • High-temperature heat-insulating flame-retardant fiber, fabric, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1: Preparation of polyamic acid salt hydrogel

[0049] (1) Stir 8.0096g ODA (4,4'-diaminodiphenyl ether) and 95.57g DMAc (dimethylacetamide) fully, when ODA is completely dissolved, then add 8.8556g PMDA (pyromellitic acid diphenyl ether) anhydride) and 4.0476 g TEA (triethylamine), which were mixed and stirred for 4 hours to yield a viscous pale yellow PAS (polyamic acid salt) solution. The PAS solution was slowly poured into water, washed, and lyophilized to obtain a pale yellow PAS solid.

[0050] (2) 5g of TEA (triethylamine) and 90g of deionized water were added to 5g of PAS, and the obtained suspension was continuously stirred for several hours. After mixing uniformly, it was left for 24h to obtain a 5% PAS hydrogel.

Embodiment 2

[0051] Example 2: Preparation of polyamic acid salt hydrogel

[0052] Prepare with reference to Example 1, the difference is that step (2) adds 5g TEA (triethylamine) and 85g deionized water to 10g PAS, and the obtained suspension is continuously stirred for several hours, and after mixing, it is still for 24h to obtain the mass. Fraction is 10% PAS hydrogel.

Embodiment 3

[0053] Example 3: Preparation of polyamic acid salt hydrogel

[0054] Prepare with reference to Example 1, the difference is that in step (2), 5g TEA (triethylamine) and 80g deionized water are added to 15g PAS, the obtained suspension is continuously stirred for several hours, and the mass fraction is obtained after mixing uniformly for 24h. 15% PAS hydrogel.

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Abstract

The invention relates to a high-temperature heat insulation fire-resistant fiber, a fabric, a preparation method and an application. The high-temperature heat insulation fire-resistant fiber is a polyimide porous fiber and has an axial orientation hole structure. The preparation method includes the steps: 1) performing solution spinning on polyamide acid saline gel, performing directional freezingduring spinning and collecting frozen fibers; 2) freeze-drying the frozen fibers and removing ice crystals to obtain the porous fiber with the orientation hole structure; 3) performing thermal amidation on the porous fiber to obtain the polyimide porous fiber. The preparation method is simple and suitable for industrial amplification application and can realize continuous large-scale preparation.

Description

technical field [0001] The invention relates to the field of preparation of heat-insulating and flame-retardant fibers, in particular to a high-temperature heat-insulating and flame-retardant fiber, fabric, preparation method and application. Background technique [0002] According to statistics from relevant departments, fires caused by decorative fabrics account for more than 20% of fire accidents. Therefore, the flame retardant function of textiles is extremely important to eliminate fire hazards, delay the spread of fire, and reduce the loss of people's lives and properties. In recent years, countries around the world have carried out research on the flame retardant technology of textiles, and have formulated corresponding testing methods for textile combustion performance, standards and application regulations for flame retardant products. my country has also carried out a lot of research on the flame retardancy of textiles, and has developed a series of flame retardant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F1/07D01F6/82D01D5/247D01D1/02
CPCD01D1/02D01D5/247D01F1/07D01F6/82
Inventor 柏浩崔滢王玉洁高微微
Owner ZHEJIANG UNIV
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