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Bio-based nano synergistic flame retardant, and preparation method and application thereof

A synergistic flame retardant and bio-based technology, applied in the field of flame retardant, can solve the environmental pollution problems of halogen flame retardants, achieve the effects of simple production process, reduced smoke toxicity, and avoid environmental pollution

Inactive Publication Date: 2021-12-21
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the early 1990s, halogen flame retardants represented by bromine and chlorine became popular, which improved the flame retardancy of materials to a certain extent, but the use of halogen flame retardants is likely to cause environmental pollution and other problems

Method used

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  • Bio-based nano synergistic flame retardant, and preparation method and application thereof
  • Bio-based nano synergistic flame retardant, and preparation method and application thereof
  • Bio-based nano synergistic flame retardant, and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0033] Please refer to the attached figure 1 , the two-dimensional material is hydroxylated boron nitride, and the preparation method mainly includes:

[0034] S1. Take an appropriate amount of hydroxylated boron nitride and add it to an appropriate amount of methanol, and ultrasonically disperse to obtain a hydroxylated boron nitride suspension;

[0035] S2. Take an appropriate amount of transition metal salt compound and dissolve it in an appropriate amount of methanol, add it dropwise to the above-mentioned hydroxylated boron nitride suspension, and stir evenly;

[0036] S3. Dissolve an appropriate amount of 2-methylimidazole in an appropriate amount of methanol, dropwise add it to the mixed solution in step S2, and after ultrasonic stirring and reaction, centrifuge to obtain the product, wash it with deionized water or ethanol for 2 to 5 times, and then wash it at 50 Dry in an oven at ~80°C for 3-10 hours to obtain intermediate products;

[0037] S4. Take an appropriate ...

Embodiment 1

[0039] S1. Add 0.252 g of hydroxylated boron nitride into 25 mL of methanol, and ultrasonically disperse for 30 minutes to obtain a suspension of hydroxylated boron nitride;

[0040] S2, take 0.743g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 25mL of methanol, added dropwise to the suspension of hydroxylated boron nitride, and stirred for 10min;

[0041] S3. Dissolve 0.415g of 2-methylimidazole in 25mL of methanol, add it dropwise to the mixed solution in step S2, sonicate for 60min, stir for 12h, centrifuge, wash with deionized water or ethanol for 3 times, and place in an oven at 60°C Dry for 10 hours to obtain BN-OH / Zn-MOF;

[0042] S4. Take 0.01g of BN-OH / Zn-MOF powder and disperse it in 25mL of methanol. After forming a uniform suspension, add 0.1mL of 0.5wt% phytic acid, and stir the reaction at room temperature. After the reaction, centrifuge, remove The BN-OH / Zn-MOF@PA flame retardant was obtained by washing with ionized water or ethanol three times, and drying in an oven...

Embodiment 2

[0050] S1. Add 0.252 g of hydroxylated boron nitride into 25 mL of methanol, and ultrasonically disperse for 30 minutes to obtain a suspension of hydroxylated boron nitride;

[0051] S2, take 1.296g Co(NO 3 ) 2 ·6H 2 O was dissolved in 50 mL of methanol, added dropwise to the suspension of hydroxylated boron nitride, and stirred for 1 h;

[0052] S3. Dissolve 1.77g of 2-methylimidazole in 50mL of methanol, add dropwise to the mixed solution in step S2, sonicate for 80min, stir for 10h, centrifuge, wash with ethanol for 4 times, and dry in an oven at 60°C for 10h to obtain BN -OH / Co-MOF;

[0053] S4. Take 0.01g BN-OH / Co-MOF powder and disperse it in 25mL of methanol. After forming a uniform suspension, add 0.2mL of 0.5wt% phytic acid, and stir the reaction at room temperature. After the reaction, centrifuge, ethanol After washing 4 times, the BN-OH / Co-MOF@PA flame retardant was obtained by drying in an oven at 60 °C for 10 h.

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Abstract

The invention discloses a bio-based nano synergistic flame retardant, and a preparation method and application thereof. The bio-based nano synergistic flame retardant comprises a transition metal organic framework, a two-dimensional material and phytic acid, the transition metal organic framework is intercalated in the two-dimensional material, and the phytic acid wraps the transition metal organic framework. The preparation method comprises the following steps: preparing a two-dimensional material suspension; respectively adding a transition metal salt solution and a 2-methylimidazole solution into the two-dimensional material suspension, uniformly stirring, and centrifuging, washing and drying after the reaction is finished to obtain an intermediate product; and uniformly mixing the intermediate product suspension with a phytic acid solution, and carrying out an ion complexation reaction to obtain the bio-based nano synergistic flame retardant. When the bio-based nano synergistic flame retardant prepared by the invention is added into epoxy resin and polylactic acid materials, the flame retardant property of a polymer composite material can be improved, so that the polymer composite material reaches the standard of flame retardancy or extinguishment after being away from fire, and the fireproof safety performance of the epoxy resin and polylactic acid materials can be improved.

Description

technical field [0001] The invention relates to the field of flame retardant technology, in particular to a bio-based nano synergistic flame retardant and its preparation method and application. Background technique [0002] Flame retardants are a class of chemical additives commonly used to improve the flame retardancy or smoke suppression of flammable or combustible substances. In the early 1990s, halogen flame retardants represented by bromine and chlorine became popular, which improved the flame retardancy of materials to a certain extent, but the use of halogen flame retardants is likely to cause environmental pollution and other problems. Therefore, with the enhancement of environmental awareness, halogenated flame retardants with potential pollution risks and secondary hazards have been gradually replaced, and greening has become an inevitable choice and development trend of flame retardants. Bio-based materials have become a research hotspot in the field of flame re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L67/04C08L87/00C08K3/38C08K5/521C08G83/00
CPCC08L63/00C08L67/04C08L87/00C08K3/38C08K5/521C08G83/008C08L2201/02C08K2003/385
Inventor 印恋周克清公凯利
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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