Flame retardant cellulose fiber and preparation method thereof

A technology of flame-retardant cellulose and cellulose, which is applied in the field of flame-retardant fibers, can solve the problems that the production process of flame-retardant fibers cannot meet the requirements of energy conservation and environmental protection, reduce the mechanical properties of product fibers, and increase the production cost of products, so as to achieve environmental benefits. The effect of protection, low operation cost and convenient operation

Inactive Publication Date: 2009-12-23
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Because it is viscose fiber, the viscose process is adopted, which determines that the entire production process of the flame retardant fiber cannot meet the requirements of energy saving and environmental protection. It is necessary to add dispersants, emulsifiers, etc. to improve the dispersibility and compatibility of the flame retardant in the stock solution, and the preparation of the above-mentioned flame-retardant cellulose fiber spinning solution needs to be carried out in two steps, that is, the viscose solution is first prepared , and then add additives such as flame retardant and dispersant, after the dispersion is uniform, and then spin to prepare flame-retardant cellulose fiber, the process is long, the efficiency is low, and the addition of flame retardant is large, which not only increases the production cost of the product, It also reduces the mechanical properties of the product fiber

Method used

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  • Flame retardant cellulose fiber and preparation method thereof

Examples

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preparation example Construction

[0021] The present invention simultaneously designs the preparation method (preparation method for short) of described flame-retardant cellulose fiber, and this preparation method comprises the following processes according to the mass ratio composition of flame-retardant cellulose fiber described in the present invention:

[0022] 1. Prepare flame retardant spinning solution; according to the mass ratio of flame retardant of the present invention to cellulose, first flame retardant is added in the ionic liquid at normal temperature, and the flame retardant is dispersed in the ionic liquid under mechanical stirring uniform, then add cellulose into the ionic liquid to fully dissolve, the dissolution temperature is 70-110°C, and prepare a flame-retardant spinning solution; the mass ratio of the flame retardant to cellulose is 10-25:100; The mass ratio of the cellulose to the ionic liquid is 5-35:95-65.

[0023] The ionic liquid is composed of cations and anions; the cations are ...

Embodiment 1

[0033] Add 0.5g of the flame retardant DDPSN that is crushed into an average particle size of less than 1um into 95g of AMIMCI ionic liquid at room temperature, stir evenly, and then add the crushed (opened fibers that are crushed into 1mm×1mm or less) fibers into the ionic liquid Vegetarian wood pulp (polymerization degree DP=592, α-cellulose content 92%) 5g, dissolving temperature is 70 ℃, mechanically stirs until completely dissolving, promptly prepares flame-retardant spinning solution;

[0034] The spinning solution is degassed, filtered, metered, spinned, coagulated (the coagulation bath is water, and the temperature of the coagulation bath is 20°C), drawing, washing, drying and other conventional wet process steps to obtain the fiber.

[0035] After testing, the dry breaking strength of the fiber obtained in this example is 1.97cN / dtex, and the limiting oxygen index (LOI) is 25.

Embodiment 2

[0037] Add 0.5 g of the flame retardant DDPSN crushed into a particle size of less than 1 um into 95 g of AMIMCI ionic liquid at room temperature, stir evenly, then add 5 g of crushed cellulose cotton pulp (DP=800, α-cellulose content 95%), The dissolution temperature is 70°C, mechanically stirred until completely dissolved, and the flame-retardant spinning solution is obtained; the spinning solution is degassed and then spun by dry and wet methods, the spinning air gap is 10cm, and the coagulation bath is 50% ionic liquid aqueous solution. The temperature of the coagulation bath was 20°C. After drawing, washing, drying and other steps, the fiber can be obtained. The rest are the same as embodiment 1.

[0038] After testing, the dry breaking strength of the fiber obtained in this example is 2.35 cN / dtex, and the limiting oxygen index (LOI) is 26.

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Abstract

The invention discloses a flame retardant cellulose fiber and a preparation method thereof. The fiber has the components of fire retardant and cellulose which have the mass ratio of 10-25:100; wherein the fire retardant is novel phosphorus fire retardant having the average grain diameter being less than 1mum; the cellulose is wood pulp or cotton pulp having the polymerization degree of 400-1000 and alpha-cellulose content being more than or equal to 90%. According to the components with the mass ratio of the fiber, the preparation method of the fiber comprises the technique as follows: 1. preparation of flame retardant spinning solution as the following: according to the mass ratio, firstly adding the fire retardant into ionic liquid at the normal temperature, and leading the fire retardant to be uniformly dispersed in the ionic liquid under mechanical agitation; then adding the cellulose into the mixed ionic liquid to be fully dissolved with the dissolving temperature of 70-110 DEG C to prepare flame retardant spinning solution; ensuring the mass ratio between the cellulose and the ionic liquid to be 5-35:95-65: 2. preparation of the flame retardant cellulose fiber: preparing the flame retardant cellulose fiber according to the conventional spinning process flow.

Description

technical field [0001] The invention relates to flame-retardant fiber technology, in particular to a flame-retardant cellulose fiber using ionic liquid as a solvent and a preparation method thereof. Background technique [0002] The fire caused by the burning of fiber products has become one of the major disasters in modern society, which seriously threatens the safety of people's lives and properties. The results of the investigation of fatal accidents caused by fire show that fires caused by interior decorations and textiles occupy the first place. At the same time, it was found that the harmful gas released by combustible textiles is much more harmful to the human body than non-combustible textiles. Therefore, the production of flame-retardant textiles to prevent fires has become a social problem that cannot be ignored, and has attracted more and more attention. At present, many countries in the world have put forward specific requirements or restrictions on the combust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/00D01F1/07D01D1/02
Inventor 宋俊程博闻纪秀杰藏洪俊陆飞梁义
Owner TIANJIN POLYTECHNIC UNIV
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