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Resveratrol-based flame retardant as well as preparation method and application thereof

A technology of resveratrol and flame retardant, which is applied in the field of flame retardant, can solve the problems of complex preparation process, low flame retardant efficiency, poor thermal stability, etc., and achieve the advantages of simple preparation method, improved flame retardant performance and high thermal stability Effect

Active Publication Date: 2022-01-14
HEFEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to overcome the defects of existing biomass flame retardants such as complex preparation process, poor thermal stability, and low flame retardant efficiency, and propose a resveratrol-based flame retardant and its preparation method

Method used

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  • Resveratrol-based flame retardant as well as preparation method and application thereof
  • Resveratrol-based flame retardant as well as preparation method and application thereof
  • Resveratrol-based flame retardant as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] First, dissolve 3 g of resveratrol, 6.54 g of potassium carbonate, and 10 ml of triethylamine in 200 ml of tetrahydrofuran at 0°C, and then add 11.20 g of diphenylphosphinyl chloride dropwise under a nitrogen atmosphere. The reaction was moved into a 60°C oil bath to continue the reaction for 6 hours, and finally the resulting product was filtered and precipitated to remove the solvent, and then purified and dried, the off-white powder obtained was the resveratrol-based flame retardant of the present invention (yield: 90 %).

[0022] figure 1 Prepare the proton nuclear magnetic resonance spectrum figure of target product for embodiment 1 1 H NMR (400MHz, DMSO), the specific analysis is as follows (δ, ppm): the chemical shift of hydrogen on the double bond is 6.96-7.08, and the chemical shift of hydrogen on the benzene ring is 7.175, 7.22-7.26, 7.27-7.32, 7.50-7.67 , 7.80~7.96.

[0023] figure 2 Prepare the nuclear magnetic resonance phosphorus spectrogram of target...

Embodiment 2

[0027] Dissolve 3g of resveratrol, 6.34g of potassium carbonate, and 10ml of triethylamine in 200ml of dichloromethane at 1°C, and then add 11.197g of diphenylphosphinyl chloride dropwise under an air atmosphere. After the addition is complete, The reaction was moved into a 45°C oil bath to continue the reaction for 7 hours, and finally the product obtained was filtered and precipitated to remove the solvent, and then purified and dried, the off-white powder obtained was the resveratrol-based flame retardant of the present invention (yield: 81 %).

Embodiment 3

[0029] Dissolve 3g of resveratrol, 6.74g of potassium carbonate, and 10ml of triethylamine in 200ml of tetrahydrofuran at 2°C, and then add 11.166g of diphenylphosphinyl chloride dropwise under a nitrogen atmosphere. After the addition is complete, the reaction Move it into an oil bath at 55°C to continue the reaction for 8 hours, and finally filter and precipitate the resulting product to remove the solvent, then purify and dry, and the off-white powder obtained is the resveratrol-based flame retardant of the present invention (yield: 79%) .

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Abstract

The invention belongs to the technical field of flame retardance, and particularly relates to a resveratrol-based flame retardant as well as a preparation method and application thereof. The molecular structural formula of the resveratrol-based flame retardant is shown in the description. The preparation method comprises the steps of dissolving resveratrol in an organic solvent, adding inorganic and organic bases, then dropwise adding diphenyl phosphinyl chloride, raising the temperature after dropwise adding is finished, continuing the reaction, filtering and precipitating the obtained product after the reaction is finished to remove the solvent, and finally obtaining the resveratrol-based flame retardant through purification and drying. According to the invention, the biomass raw material resveratrol is selected to react with the phosphorus-containing diphenyl phosphinyl chloride, and the phosphorus element is introduced, so that in the heating or combustion process of the composite material, the carbonization of the polymer can be rapidly promoted, the oxygen insulation and the heat insulation can be rapidly achieved, the release of the combustible gas and the toxic flue gas can be reduced, and the flame retardation of the composite material can be improved. Meanwhile, the resveratrol-based flame retardant has relatively high thermal stability, contains double bonds, can be subjected to an addition reaction at high temperature to form a macromolecular chain structure, and is interwoven and wound with a polymer molecular chain, so that the mechanical property of the polymer is improved.

Description

technical field [0001] The invention belongs to the field of flame retardant technology, and relates to a flame retardant applied to polymer materials, in particular to a resveratrol-based flame retardant and its preparation method and application. Background technique [0002] Polymer materials are widely used and bring great convenience to people's daily life. However, most polymer materials are flammable, which poses a huge potential hazard to human life and property. Adding flame retardants to polymer materials is the most effective way to endow them with excellent flame retardant properties. At present, most of the flame retardants used in polymer materials will produce a large amount of toxic smoke during the combustion process, which will bring serious harm to the environment. Some flame retardants will also produce carcinogens when burned, so the development of green, safe and environmentally friendly Flame retardants have been the development trend in the field of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/5313C08L63/02
CPCC08K5/5313C08L2201/02C08L63/00
Inventor 杨伟徐玉高田玉陈可夏鲁红典
Owner HEFEI UNIV
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