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Functional modified silicon dioxide flame-retardant modified polylactic acid composite fiber and preparation method thereof

A technology of silica and composite fibers, which is applied in the manufacture of fire-retardant and flame-retardant filaments, chemical characteristics of fibers, and rayon manufacturing. shedding effect

Inactive Publication Date: 2021-09-10
南陵县麒霆新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a functionalized modified silica flame-retardant modified polylactic acid composite fiber and its preparation method, which solves the problem of poor toughness and flame-retardant performance of polylactic acid fiber

Method used

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  • Functional modified silicon dioxide flame-retardant modified polylactic acid composite fiber and preparation method thereof
  • Functional modified silicon dioxide flame-retardant modified polylactic acid composite fiber and preparation method thereof
  • Functional modified silicon dioxide flame-retardant modified polylactic acid composite fiber and preparation method thereof

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preparation example Construction

[0028] In order to achieve the above object, the present invention provides the following specific embodiments and examples: a functionalized modified silica flame retardant modified polylactic acid composite fiber, the preparation method comprising the following steps:

[0029] (1) Add acetonitrile solvent and nano silicon dioxide to the reactor, ultrasonically disperse evenly, continue to add adipic acid, wherein the mass ratio of acetonitrile solvent, nano silicon dioxide and adipic acid is 450-1200:10:15-40 , mix evenly, transfer to an oil bath, raise the temperature to 70-90°C, stir and react at a constant temperature for 12-36h, centrifuge, wash and dry after the reaction to obtain carboxylated silica;

[0030] (2) Add tetrahydrofuran solvent and carboxylated silica into the reactor, ultrasonically disperse for 10-30min, continue to add hydroxyl-terminated nitrile rubber and dicyclohexyl carbodiimide, wherein tetrahydrofuran solvent, carboxylated silica, terminal The mas...

Embodiment 1

[0035] (1) Add 290mL of acetonitrile solvent and 5g of nano-silica to the reactor, ultrasonically disperse evenly, continue to add 7.5g of adipic acid, mix evenly, transfer to an oil bath, raise the temperature to 70°C, and stir at a constant temperature for reaction 12h, centrifuged after the reaction, washed and dried to obtain carboxylated silicon dioxide;

[0036] (2) Add 340mL tetrahydrofuran solvent and 5g carboxylated silica into the reactor, ultrasonically disperse for 10min, continue to add 6g hydroxy-terminated nitrile rubber and 15g dicyclohexylcarbodiimide, stir mechanically and transfer to the oil bath , stirred and reacted at 20°C for 12 hours, precipitated after the reaction, filtered with suction, washed and dried to obtain hydroxy-terminated nitrile rubber-modified silica;

[0037] (3) Add 270mL of n-hexane solvent and 5g of hydroxy-terminated nitrile rubber modified silica into the reactor, ultrasonically disperse until completely dissolved, continue to add 0...

Embodiment 2

[0041] (1) Add 360mL of acetonitrile solvent and 5g of nano-silica into the reactor, ultrasonically disperse evenly, continue to add 11g of adipic acid, mix evenly, transfer to an oil bath, raise the temperature to 75°C, and stir at a constant temperature for 16h , centrifuging, washing and drying after the reaction to obtain carboxylated silicon dioxide;

[0042] (2) Add 500mL tetrahydrofuran solvent and 5g carboxylated silica into the reactor, ultrasonically disperse for 15min, continue to add 7.5g hydroxyl-terminated nitrile rubber and 20g dicyclohexyl carbodiimide, mechanically stir evenly and transfer to an oil bath In a pot, stir and react at 25°C for 15 hours, precipitate after the reaction, filter with suction, wash and dry to obtain hydroxy-terminated nitrile rubber-modified silica;

[0043] (3) Add 400mL of n-hexane solvent and 5g of hydroxy-terminated nitrile rubber modified silica into the reactor, ultrasonically disperse until completely dissolved, continue to add...

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Abstract

The invention relates to the technical field of new materials, and discloses a functional modified silicon dioxide flame-retardant modified polylactic acid composite fiber. Silicon dioxide reacts with adipic acid to obtain carboxylated silicon dioxide; the carboxylated silicon dioxide reacts with hydroxyl-terminated butadiene-acrylonitrile rubber to obtain hydroxyl-terminated butadiene-acrylonitrile rubber modified silicon dioxide; the hydroxyl-terminated butadiene-acrylonitrile rubber modified silicon dioxide reacts with isophorone diisocyanate to obtain isocyanate butadiene-acrylonitrile rubber modified silicon dioxide; the isocyanate butadiene-acrylonitrile rubber modified silicon dioxide further reacts with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to obtain phosphaphenanthrene-based butadiene-acrylonitrile rubber modified silicon dioxide; the phosphaphenanthrene-based butadiene-acrylonitrile rubber modified silicon dioxide is mixed with polylactic acid; and melt spinning is performed to obtain the functional modified silicon dioxide flame-retardant modified polylactic acid composite fiber. Butadiene-acrylonitrile rubber and nano silicon dioxide can absorb and disperse stress energy, a phosphaphenanthrene group can generate oxyacid of phosphorus when being combusted to promote carbon formation of a matrix and form a carbon protection layer, and the nano silicon dioxide is deposited on the surface of a carbon layer to enhance the barrier effect, so that the flame retardant property of the composite fiber is enhanced.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a functionalized modified silicon dioxide flame-retardant modified polylactic acid composite fiber and a preparation method. Background technique [0002] my country is a country with a large population, so the demand for fibers and fabrics is extremely high. Although my country's current synthetic fiber production is extremely large and can meet the needs of domestic residents, my country's current synthetic fibers are extremely dependent on fossil energy, which has exacerbated the consumption of fossil energy. At the same time, it also has an indelible impact on the environment on which human beings live. Therefore, it is of great strategic significance to develop new renewable and biodegradable fiber materials. Polylactic acid is characterized by its excellent renewable and biodegradable properties. With excellent biocompatibility, it has gradually entered people's field o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F1/07D01F6/92D01F1/10
CPCD01F1/07D01F6/92D01F1/10
Inventor 张家新
Owner 南陵县麒霆新材料科技有限公司
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