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Flame-retardant cotton fiber and preparation method thereof

A flame-retardant cotton and fiber technology, which is applied in fiber treatment, plant fiber, textiles and papermaking, etc., can solve the problems of difficult-to-substrate flame-retardant effect and limited flame-retardant effect, and achieve reduction of secondary hazards, low cost, Wide range of effects

Inactive Publication Date: 2013-02-13
TAIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When subjected to strong heat or burning, the organic component (polyelectrolyte) in the polymer nanocomposite coating is difficult to play a flame retardant effect on the matrix material (such as cotton fiber) due to its own flammability; while the inorganic component, For example, although the montmorillonite layer can protect the matrix material to a certain extent, its flame retardant effect is quite limited in the case of low addition.

Method used

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  • Flame-retardant cotton fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 1 g of ammonium polyphosphate, 20 g of polyvinyl alcohol and 1000 mL of distilled water into a three-necked flask, stir and raise the temperature to 90° C., and stir for 4 hours to obtain an aqueous solution of polyvinyl alcohol containing ammonium polyphosphate.

[0027] Add 1 g of sodium-based montmorillonite with an ion exchange capacity of 100 mmol / 100 g and 1000 mL of distilled water into a three-necked flask, stir and raise the temperature to 80° C., and stir for 6 hours to obtain a montmorillonite suspension.

[0028] The cotton fiber is first immersed in a polyvinyl alcohol aqueous solution containing ammonium polyphosphate for 20 seconds, taken out and dried in a blast drying oven at 120°C for 15 minutes, washed with distilled water for 3 times; then immersed in the montmorillonite suspension for immersion time After 10 seconds, take it out and bake it in a blast drying oven at 120°C for 15 minutes, and wash it with distilled water 3 times. Repeat the above step...

Embodiment 2

[0030] The preparation operation of the flame-retardant cotton fiber treated with a layer of ammonium polyphosphate modified polyvinyl alcohol / montmorillonite composite coating is the same as in Example 1. In the polyvinyl alcohol aqueous solution containing ammonium polyphosphate, the mass ratio of ammonium polyphosphate to polyvinyl alcohol is 1.0:5.0, and the volumetric amount of water is 200ml / g based on the mass of polyvinyl alcohol; in the montmorillonite suspension, Montmorillonite is calcium-based montmorillonite, the ion exchange capacity is 40mmol / 100g, and the volume of water is 200ml / g based on the mass of montmorillonite; during the preparation process of the coated flame-retardant cotton fiber, it is immersed in polyphosphoric acid The ammonium polyvinyl alcohol aqueous solution time is 5 seconds, the immersion time into the montmorillonite suspension is 30 seconds, the drying temperature is 100°C, the drying time is 20 minutes, and the number of times of washing w...

Embodiment 3

[0032] The preparation operation of the flame-retardant cotton fiber treated with the 10-layer ammonium polyphosphate modified polyvinyl alcohol / montmorillonite composite coating is the same as in Example 1. In the polyvinyl alcohol aqueous solution containing ammonium polyphosphate, the mass ratio of ammonium polyphosphate to polyvinyl alcohol is 1.0:3.0, and the volumetric amount of water is 100ml / g based on the mass of polyvinyl alcohol; in the montmorillonite suspension, used Montmorillonite is sodium-calcium-based montmorillonite, the ion exchange capacity is 200mmol / 100g, and the volumetric dosage of water is 100ml / g based on the mass of montmorillonite; the coating process The time of ammonium polyphosphate in polyvinyl alcohol aqueous solution is 120 seconds, the immersion time in the montmorillonite suspension is 10 seconds, the drying temperature is 60℃, the drying time is 30 minutes, the number of times of washing with distilled water is 8 times, the flame-retardant c...

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Abstract

The invention discloses a flame-retardant cotton fiber and a preparation method thereof. An intumescent flame-retardant modified polyvinyl alcohol / montmorillonoid composite coating contains an intumescent flame retardant, polyvinyl alcohol and montmorillonoid. The intumescent flame-retardant modified polyvinyl alcohol / montmorillonoid composite coating is prepared by adopting the following step of: carrying out layer-by-layer self-assembly on a polyvinyl alcohol aqueous solution with the intumescent flame retardant and montmorillonoid suspension liquid dispersed in water to obtain the intumescent flame-retardant modified polyvinyl alcohol / montmorillonoid composite coating. The flame-retardant cotton fiber is obtained by treating the intumescent flame-retardant modified polyvinyl alcohol / montmorillonoid composite coating. According to the flame-retardant cotton fiber and the preparation method thereof, the intumescent flame-retardant modified polyvinyl alcohol / montmorillonoid composite coating is prepared by the adoption of a layer-by-layer self-assembly technology; and through the synergistic flame-retardant effect of the intumescent flame retardant and montmorillonoid, the flame retardance of cotton fibers is improved, so that the usage amount of the flame retardant for cotton fabrics is reduced, therefore the cost of flame-retardant cotton fibers is lowered.

Description

Technical field [0001] The invention relates to a flame-retardant cotton fiber and a preparation method thereof, in particular to a cotton fiber treated with an intumescent flame retardant modified polyvinyl alcohol / montmorillonite composite coating and a preparation method thereof. Background technique [0002] Cotton fabric is a flammable material (limiting oxygen index is 18), and the burning speed is very fast and difficult to extinguish. The fire hazard caused by this has become a public safety issue of concern to the whole society, and changing its flammability has become more and more important. People attach great importance to it. Although flame retardant finishing can effectively improve the flame retardancy of cotton fabrics, the flame retardant or flame retardant system used has many inherent deficiencies. For example, boron flame retardants have poor adhesion, inorganic phosphorus flame retardants are not washable, and halogen flame retardants are highly toxic and p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/333D06M11/71D06M13/364D06M11/79D06M101/06
Inventor 黄国波陈素清梁华定
Owner TAIZHOU UNIV
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