A kind of flame-retardant regenerated cellulose fiber and its preparation method

A technology of regenerated cellulose and cellulose, which is used in the manufacture of fire-retardant and flame-retardant filaments, rayon in cellulose solutions, etc., can solve the problems of difficulty in taking into account the flame-retardant properties and mechanical properties of cellulose fibers and easy loss. Achieve the effect of solving the difficulty of taking into account flame retardancy and mechanical properties, reducing dosage, excellent mechanical properties and wearability

Active Publication Date: 2021-09-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of flame-retardant regenerated cellulose fiber and its preparation method, to overcome the problem that both the flame-retardant and mechanical properties of cellulose fiber are difficult to balance in the prior art and the typical viscose flame retardant The problem of easy loss during the Lyocell fiber spinning process, in the present invention, a flame retardant that does not react with N-methylmorpholine-N-oxide NMMO and is insoluble in water and NMMO is used, and the flame retardant is miniaturized.

Method used

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  • A kind of flame-retardant regenerated cellulose fiber and its preparation method

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Experimental program
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Embodiment 1

[0034] (1) Wood pulp cellulose (DP=550, α-cellulose content is 88%) is pulverized into the flake of 2cm * 2cm, weighs the wood pulp cellulose of 230g pulverization; Disperses 73g piperazine pyrophosphate to 500g50% NMMO and ground on a ball mill for 8 hours to obtain the flame retardant mother liquor, after testing, the average particle diameter of the flame retardant is 1.6 μm; the pulverized wood pulp cellulose, flame retardant mother liquor and 2260g50% NMMO solvent are added to Mix in the dissolving tank, let it stand for swelling for 30 minutes, then vacuumize and dehydrate at 90°C and stir mechanically to completely dissolve the cellulose to obtain a spinning solution;

[0035] (2) The above-mentioned spinning solution is metered by a metering pump under a nitrogen pressure of 0.3MPa and then extruded from the micropores of the spinneret. After passing through an air section, it enters a water coagulation bath with a temperature of 20°C. After drawing, washing, After dry...

Embodiment 2

[0037](1) wood pulp cellulose (DP=800, α-cellulose content 96.6%) is pulverized into small pieces of 2cm × 2cm, and 230g of pulverized wood pulp cellulose is weighed; 58g of piperazine pyrophosphate is dispersed into 500g of 50% In NMMO and ground on a ball mill for 8 hours to obtain the flame retardant mother liquor, after testing, the average particle size of the flame retardant is 1.8 μm; the pulverized wood pulp cellulose, flame retardant mother liquor and 2260g50% NMMO solvent are added to dissolve Mix in the kettle, let stand to swell for 30min, then vacuumize and dehydrate at 90°C and stir mechanically to completely dissolve the cellulose to obtain the spinning solution;

[0038] (2) The above-mentioned spinning solution is measured by a metering pump under a nitrogen pressure of 0.4 MPa and then extruded from the spinneret micropores. After passing through an air section, it enters a water coagulation bath with a temperature of 20 ° C. After drawing, washing, After dry...

Embodiment 3

[0040] (1) Wood pulp cellulose (DP=550, α-cellulose content is 88%) is pulverized into the flake of 2cm * 2cm, weighs the wood pulp cellulose of 230g pulverization; Disperses 44g piperazine pyrophosphate to 500g50% In NMMO and ground on a ball mill for 8 hours to obtain the flame retardant mother liquor, after testing, the average particle diameter of the flame retardant is 1.8 μm; the NMMO solvent of the pulverized wood pulp cellulose, flame retardant mother liquor and 2260g50% is added to Mix in the dissolving kettle, let it stand for swelling for 30 minutes, then vacuumize and dehydrate at 90°C and stir mechanically to completely dissolve the cellulose to obtain the spinning solution;

[0041] (2) The above-mentioned spinning solution is metered by a metering pump under a nitrogen pressure of 0.3MPa and then extruded from the micropores of the spinneret. After passing through an air section, it enters a water coagulation bath with a temperature of 20°C. After drawing, washin...

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Abstract

The invention relates to a flame retardant regenerated cellulose fiber and a preparation method thereof. The flame retardant is dispersed and mixed in an NMMO solvent, and ball milled to obtain a flame retardant mother liquor; then the cellulose flakes, the flame retardant mother liquor and the NMMO solvent are uniformly mixed , after static swelling, stirring and heating and vacuuming, the spinning stock solution is prepared, and spinning is obtained. The preparation method of the invention is simple, the spinning process is green and environment-friendly, and the prepared Lyocell fiber has excellent flame-retardant performance, and has good mechanical performance and wearing performance.

Description

technical field [0001] The invention belongs to the field of flame-retardant fiber and its preparation, in particular to a flame-retardant regenerated cellulose fiber and its preparation method. Background technique [0002] Cellulose is the most abundant natural polymer in nature, and its source is abundant and renewable. Facing the problem of decreasing and limited petroleum resources, the development of cellulose fibers with non-petroleum as raw materials is of great significance to the sustainable development of China and the world. However, cellulose fibers are extremely flammable when exposed to fire, which limits their application in fields with high requirements for flame retardancy. Patents such as CN101387013A, CN101215726A, CN101050559A, and CN101050559A disclose that flame retardants are added to viscose spinning dope, and flame-retardant cellulose fibers are prepared by wet spinning. However, the viscose production process is long, complicated, and energy-cons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/02D01F1/07
CPCD01F1/07D01F2/02
Inventor 杨革生彭康张慧慧杨彦菊沈洋邵惠丽
Owner DONGHUA UNIV
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