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
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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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