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Biodegradable halogen-free flame retardant and preparation method thereof

A kind of flame retardant, biological technology, applied in the field of biodegradable halogen-free flame retardant and its preparation, to achieve the effect of environmental friendliness, wide source and excellent flame retardant performance in production and manufacturing

Inactive Publication Date: 2016-12-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, some meaningful progress has been made in the research on the synergistic effect of metal compounds on different flame retardant systems, but there are few reports on the combination of natural polymer-based flame retardants and metal-catalyzed synergistic effects.

Method used

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  • Biodegradable halogen-free flame retardant and preparation method thereof
  • Biodegradable halogen-free flame retardant and preparation method thereof
  • Biodegradable halogen-free flame retardant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Preparation of phosphated chitosan: Dissolve 4g of chitosan in 60ml of methanesulfonic acid, add 20g of phosphorus pentoxide after complete dissolution, react under nitrogen protection, and continue for 3 hours in an ice-water bath at -10°C . The product after the reaction was washed with ether, acetone, and methanol respectively, and a white powder was obtained after suction filtration in a suction filtration machine. Then, put the white powder into a vacuum drying oven and dry for 24 hours to obtain the intermediate product phosphorylated chitosan.

[0031] (2) Preparation of functionalized chitosan: 4g phosphorylated chitosan is dissolved in 120ml distilled water, and after dissolving completely, a brown transparent solution is obtained, then the sodium hydroxide solution of 1.0mol / L is added dropwise in the solution, and stir until the solution is neutral. 200ml of 0.5mol / L cobalt chloride was added dropwise to the resulting neutral solution, while stirring fo...

Embodiment 2

[0035] (1) Preparation of phosphated chitosan: Dissolve 4g of chitosan in 60ml of methanesulfonic acid, add 28g of phosphorus pentoxide after complete dissolution, and react in an ice-water bath at 5° C. for 5 hours under nitrogen protection. The product after the reaction was washed with ether, acetone, and methanol respectively, and a white powder was obtained after suction filtration in a suction filtration machine. Then, put the white powder into a vacuum drying oven and dry for 24 hours to obtain the intermediate product phosphorylated chitosan.

[0036] (2) Preparation of functionalized chitosan: 4g phosphorylated chitosan is dissolved in 120ml distilled water, and after dissolving completely, a brown transparent solution is obtained, then the sodium hydroxide solution of 2.0mol / L is added dropwise in the solution, and stir until the solution is neutral. 100ml of 1mol / L cerium nitrate was added dropwise to the obtained neutral solution while stirring for 8h. After the ...

Embodiment 3

[0040] (1) Preparation of phosphated chitosan: Dissolve 4g of chitosan in 60ml of methanesulfonic acid, add 36g of phosphorus pentoxide after complete dissolution, and react in an ice-water bath at 0° C. for 8 hours under nitrogen protection. The product after the reaction was washed with ether, acetone, and methanol respectively, and a white powder was obtained after suction filtration in a suction filtration machine. Then, put the white powder into a vacuum drying oven and dry for 24 hours to obtain the intermediate product phosphorylated chitosan.

[0041] (2) Preparation of functionalized chitosan: 4g phosphorylated chitosan is dissolved in 120ml distilled water, after dissolving completely, a brown transparent solution is obtained, then the potassium hydroxide solution of 1.0mol / L is added dropwise in the solution, and stir until the solution is neutral. Add 66.67ml of 1.5mol / L ferric chloride dropwise into the resulting neutral solution while stirring for 10h. After th...

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Abstract

The invention discloses a biodegradable halogen-free flame retardant and a preparation method thereof. According to the method, chitosan, phosphorus pentoxide and other substances are subjected to reaction to achieve the goal of chitosan phosphating, thereby generating the intermediate product phosphated chitosan containing flame-retardant elements. A chemical process is utilized to introduce metal elements into the phosphated chitosan, thereby preparing functionalized chitosan. Green environment-friendly renewable polysaccharide natural high-polymer chitosan with wide sources and low price is selected as the raw material, thereby solving the problem of limits to flame retardant production due to shortage of petroleum resources, being environment-friendly, and avoiding environment pollution. Besides, the chemical process is utilized to combine the catalytic synergistic effects of the natural high-polymer-base flame retardant and metals on the molecular level, thereby preparing the flame-retardant synergistic integrated biomass flame retardant. The flame retardant has favorable high-temperature carbon forming property, and can obviously enhance the flame retardancy of the material when being used in polymers and other materials.

Description

technical field [0001] The invention belongs to the technical field of flame retardant design and preparation, and in particular relates to a biodegradable halogen-free flame retardant and a preparation method thereof. Background technique [0002] Halogen flame retardants have always been our commonly used flame retardants, but they are gradually abandoned by humans due to their low efficiency and non-environmental protection. Recently, intumescent flame retardants have gradually replaced halogen flame retardants in the flame retardant treatment of polymer materials due to their high efficiency and low toxicity, and have become a hot spot in flame retardant research. For traditional intumescent flame retardants, the carbon source mainly comes from petroleum cracking products. With the development of science and technology and society, the excessive consumption of oil has led to the oil crisis that the whole world must face together, and has brought a series of environmenta...

Claims

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Application Information

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IPC IPC(8): C08B37/08C08L23/12C08L5/08
CPCC08B37/003C08L23/12C08L2201/02C08L2201/06C08L2201/22C08L5/08
Inventor 江赛华师星星
Owner SOUTH CHINA UNIV OF TECH