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Method for preparing Nano SiO2 fire retardant viscose fiber, and film

A flame-retardant viscose fiber and nanotechnology, which is applied in the manufacture of fire-retardant and flame-retardant filaments, man-made filaments made of cellulose derivatives, man-made filaments made of viscose, etc. Workload and other problems, to achieve the effect of simple process, easy operation and good flame retardant

Active Publication Date: 2007-10-10
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, nano-SiO 2 The application of regenerated cellulose industries such as viscose fiber and cellophane can reduce pollution, reduce costs, and increase product added value. However, silicate is used as nano-SiO in the preparation of polymer / nanocomposites. 2 Because of the high concentration of sodium oxide or potassium oxide, the silicate undergoes acidolysis after entering the coagulation bath. On the one hand, it consumes the sulfuric acid in the coagulation bath and generates a large amount of sulfate. On the other hand, it affects the coagulation. The composition of sulfuric acid and sulfate in the bath brings a large workload to the treatment of the coagulation bath

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 31.25 grams of Si0 2 Alkaline silica sol with a content of 20% was added to 500 g of a viscose aqueous solution with an α-cellulose content of 8.35% (mass) and a sodium hydroxide content of 5.8% (mass), and stirred at 18 ° C for 0.5 hours, Then, vacuum defoaming was performed at 18° C. for 8 hours to remove gas contained in the solution to obtain a viscose-silica sol solution.

[0018] Take a small amount of viscose-silica sol solution, apply a uniform film on a flat plate with an applicator, and then put the film into a coagulation bath composed of sulfuric acid content of 100 g / L, sodium sulfate 270 g / L and water , reacted at 50 °C for 10 seconds to obtain SiO 2 15% cellulose / SiO 2 organic-inorganic polymer nanocomposite films.

[0019] Cellulose / SiO 2 The organic-inorganic polymer nanocomposite film is ignited in fire and can be self-extinguishing after leaving the fire source, the limiting oxygen index is 27.0%, and the SiO in the film 2 The particle size ...

Embodiment 2

[0021] The viscose-silica sol solution in Example 1 was taken and entered into a coagulation bath through a spinning machine at a speed of 80 m / s for spinning to form primary filaments. The coagulation bath was composed of sulfuric acid content of 130 g / L, sodium sulfate 270 g / L, zinc sulfate 11 g / L and water, and the temperature was 50°C. The spun silk is then drawn, washed with water, and washed with alkali to obtain nano-SiO 2 Flame retardant viscose.

[0022] The dry strength of the flame retardant viscose fiber is 2.36cN / dtex, the wet strength is 1.31cN / dtex, the dry elongation is 14.6%, and the limiting oxygen index is 27.3%. 2 The particle size is around 20 nm.

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Abstract

The present invention relates to a preparation method of nano SiO2 fire-retardant viscose fiber and film, specially, it relates to a preparation method of fire-retardant viscose fiber formed from cellulose and SiO2 and organic-inorganic polymer nano composite membrane made of cellulose and SiO2. Said method includes the following steps: adding silicone sol with a certain mass into a viscose solution whose composition contains alpha-cellulose whose mass percentage content is 6-9% and sodium hydroxide whose mass percentage content is 5-6%; fully stirring and mixing them at 10-50 deg.C, deforming so as to obtain viscose-silicone sol solution, then adding said viscose-silicone sol into a coagulation acid bath prepared by using sulfuric acid, sodium sulfate, zinc sulfate and water, coagulating at 10-100 deg.C, spinning so as to obtain nano SiO2 fiber-retardant viscose fiber, utilizing coating process so as to obtain organic-inorganic polymer nano composite membrane of cellulose / SiO2.

Description

Technical field: [0001] The present invention relates to a kind of nanometer SiO 2 The preparation method of flame-retardant viscose fiber and film is to adopt viscose method, use viscose (ie, sodium hydroxide aqueous solution of cellulose sulfonate) and silica sol as raw materials, and through mixing, defoaming, spinning, regeneration, Processes such as water washing and alkali washing to realize nano-SiO 2 The preparation of flame retardant viscose fibers and films, especially relates to a kind of cellulose and silica (SiO 2 ) composed of flame-retardant viscose fibers and cellulose / SiO 2 The invention relates to a preparation method of an organic-inorganic polymer nanocomposite film, which belongs to the field of polymer materials. technical background: [0002] Cellulose can be used to make fibers, plastics, films, films, etc., and has a wide range of uses in civil, industrial, medical, national defense and scientific research. The resources of cellulose are unlimite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/08D01F1/07D01F2/24C08J5/18
Inventor 纪全夏延致曾静逄奉建孔庆山
Owner QINGDAO UNIV
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