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Flame-retardant modified polyacrylonitrile fiber

A technology of polyacrylonitrile fiber and polyacrylonitrile, which is applied in the direction of flame-retardant fiber, fiber type, fiber treatment, etc., and can solve problems such as flammability and secondary harm to the human body

Inactive Publication Date: 2021-09-24
武汉度美迪新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the limiting oxygen index of polyacrylonitrile fiber is only 18%, and it is very easy to burn when it encounters a fire source, and the fiber releases toxic and harmful gases such as hydrogen cyanide, carbon monoxide, and acetonitrile during the violent combustion process, thereby causing fatal secondary damage to the human body. harm

Method used

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  • Flame-retardant modified polyacrylonitrile fiber

Examples

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Comparison scheme
Effect test

Embodiment 1

[0033] A flame-retardant modified polyacrylonitrile fiber, the preparation method of the modified polyacrylonitrile fiber comprises the steps:

[0034] (1) Aluminum borate modification: Mix ethanol and distilled water in a weight ratio of 9:1 to prepare a solvent, adjust its pH to 4.0 with acetic acid, configure a silane coupling agent with a mass fraction of 5%, and use a magnetic stirring device for the reaction The mixture was stirred for 1 h for prehydrolysis. 10 g of borate whiskers were dispersed in 50 g of distilled water by ultrasound. Add 2g of pre-hydrolyzed silane coupling agent, mix and stir for 10 minutes, and let stand for reaction for 30 minutes. After filtering and drying in a vacuum oven at 120° C. for 24 hours, silanized aluminum borate whiskers were obtained.

[0035] (2) Dissolve the modified 0.2g of silanized aluminum borate whiskers and 10g of polyacrylonitrile in 50g of N-N-dimethylformamide, stir with a constant temperature magnetic stirrer at 80°C fo...

Embodiment 2

[0039] A flame-retardant modified polyacrylonitrile fiber, the preparation method of the modified polyacrylonitrile fiber comprises the steps:

[0040] (1) Aluminum borate modification: Mix ethanol and distilled water at a weight ratio of 9:1 to prepare a solvent, adjust its pH to 4.0–5.0 with acetic acid, configure a silane coupling agent with a mass fraction of 5%, and react using a magnetic force The stirring device stirred the mixture for 1 h to pre-hydrolyze. 10 g of borate whiskers were dispersed in 50 g of distilled water by ultrasound. Add 6g of pre-hydrolyzed silane coupling agent, mix and stir for 10 minutes, and let stand for reaction for 30 minutes. After filtering and drying in a vacuum oven at 120° C. for 24 hours, silanized aluminum borate whiskers were obtained.

[0041](2) Dissolve the modified 0.4g of silanized aluminum borate whiskers and 10g of polyacrylonitrile in 60g of N-N-dimethylformamide, stir with a constant temperature magnetic stirrer at 100°C fo...

Embodiment 3

[0045] A flame-retardant modified polyacrylonitrile fiber, the preparation method of the modified polyacrylonitrile fiber comprises the steps:

[0046] (1) Aluminum borate modification: Mix ethanol and distilled water in a weight ratio of 9:1 to prepare a solvent, adjust its pH to 4.0 with acetic acid, configure a silane coupling agent with a mass fraction of 5%, and use a magnetic stirring device for the reaction The mixture was stirred for 1 h for prehydrolysis. 10 g of borate whiskers were dispersed in 50 g of distilled water by ultrasound. Add 6g of pre-hydrolyzed silane coupling agent, mix and stir for 10 minutes, and let stand for reaction for 30 minutes. After filtering and drying in a vacuum oven at 120° C. for 24 hours, silanized aluminum borate whiskers were obtained.

[0047] (2) Dissolve the modified 0.6g of silanized aluminum borate whiskers and 10g of polyacrylonitrile in 50g of N-N-dimethylformamide, stir with a constant temperature magnetic stirrer at 8°C for...

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Abstract

The invention discloses a preparation method of flame-retardant modified polyacrylonitrile fiber. The method comprises the following steps of firstly, carrying out surface treatment on borate whiskers by using a silane coupling agent to obtain silanized borate whiskers; then blending the silanized borate whiskers and polyacrylonitrile to prepare polyacrylonitrile fiber; then grafting the polyacrylonitrile fiber with methyl methacrylate by using an ultraviolet grafting technology to obtain modified polyacrylonitrile fiber; and finally reacting the modified polyacrylonitrile fiber with phosphoric acid and urea to obtain the flame-retardant modified polyacrylonitrile fiber. According to the invention, the borate whiskers are introduced into the polyacrylonitrile, so that the mechanical strength and thermal conductivity of the fiber are effectively improved; and the methyl methacrylate is grafted on the surface of the polyacrylonitrile fiber through chemical grafting and interacts with the phosphoric acid and the urea, and flame-retardant phosphorus and nitrogen elements are introduced into the surface of fiber molecule, so that the flame retardance of the modified polyacrylonitrile fiber is effectively improved.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a flame-retardant modified polyacrylonitrile fiber. Background technique [0002] Polyacrylonitrile is a compound obtained by free radical polymerization of monomer acrylonitrile. It is a white or slightly yellow opaque powder. Polyacrylonitrile is resistant to chemical agents, especially inorganic acids, bleaching powder, hydrogen peroxide and general organic agents. Polyacrylonitrile is mainly used to make polyacrylonitrile fiber (acrylic), which has good weather resistance and sun resistance, and can maintain 77% of its original strength after being placed outdoors for 18 months. The research and development trend of polyacrylonitrile can be summarized into two aspects; one is the research of new fiber-forming process, such as the use of plasticizer method to synthesize polyacrylonitrile copolymer, in order to reduce the interaction between polyacrylonitrile macromolecules a...

Claims

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Application Information

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IPC IPC(8): D06M14/28D06M13/432D06M11/70D01F6/54D01F1/10D01F11/06D06M101/28
CPCD06M14/28D06M13/432D06M11/70D01F6/54D01F1/10D01F11/06D06M2101/28D06M2200/30
Inventor 李鹏龙杰吴苏州陈俊孚
Owner 武汉度美迪新能源科技有限公司
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