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Nanocellulose surface-modified core-shell structure fire retardant, and preparation method and application of fire retardant

A nanocellulose and surface modification technology, applied in the field of flame retardant materials, can solve the problems of weakening the flame retardant performance of intumescent flame retardants, insufficient carbon source of intumescent flame retardants, and great influence on the mechanical properties of materials, etc. Good flame retardant properties, increased contact area, and strong operability

Active Publication Date: 2015-07-29
国科广化(南雄)新材料研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its own structure, the compatibility between APP and the matrix is ​​poor, and problems such as agglomeration are prone to occur during the blending process, which has a great impact on the mechanical properties of the material.
When used as an intumescent flame retardant, due to the weak char formation ability of most substrates, this is the insufficient carbon source of the intumescent flame retardant, which weakens the flame retardant performance of the intumescent flame retardant, so the carbon Insufficient sources become the shortcomings of intumescent flame retardants that need to be improved

Method used

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  • Nanocellulose surface-modified core-shell structure fire retardant, and preparation method and application of fire retardant
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  • Nanocellulose surface-modified core-shell structure fire retardant, and preparation method and application of fire retardant

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Prepare the nanocellulose surface modified core-shell structure flame retardant according to the following steps:

[0029] (1) Add 5.00 g of melamine and 9.00 mL of 37% formaldehyde solution at room temperature to a three-necked flask containing 50.00 mL of deionized water, dropwise add potassium hydroxide solution to adjust the pH to 8-9, stir and heat up After reaching 70°C, keep stirring and heat-preserve for 40 minutes. After the reaction is complete, an emulsified liquid is obtained, which is cooled to room temperature; the cooled emulsified liquid is added to a flask containing 60.00 g of APP, and 80.00 mL of ethanol solution is added to stir, drop Add acetic acid solution to adjust the pH value to 3-4, slowly heat to 60°C, keep warm at this temperature for 1 hour, then stir to cool down, filter with suction, wash, dry, and finally get a white powder;

[0030] (2) Take 7.00g of microcrystalline cellulose, dissolve it in 61.25g of 64% concentrated sulfuric acid, st...

Embodiment 2

[0032] Prepare the nanocellulose surface modified core-shell structure flame retardant according to the following steps:

[0033] (1) At room temperature, add 5.00 g of melamine and 9.00 mL of formaldehyde solution with a mass concentration of 37% to a three-necked flask containing 50.00 mL of deionized water, add dropwise sodium hydroxide solution to adjust the pH value to 8-9, stir and heat up After reaching 70°C, keep stirring and heat-preserve for 40 minutes. After the reaction is complete, an emulsified liquid is obtained, which is cooled to room temperature; the cooled emulsified liquid is added to a flask containing 60.00 g of APP, and 80.00 mL of ethanol solution is added to stir, drop Add formic acid solution to adjust the pH value to 3-4, slowly heat to 60°C, keep warm at this temperature for 1 hour, then stir to cool down, filter with suction, wash, dry, and finally get a white powder;

[0034] (2) Take 12.00g of microcrystalline cellulose, dissolve it in 105.00g of...

Embodiment 3

[0036] Prepare the nanocellulose surface modified core-shell structure flame retardant according to the following steps:

[0037] (1) Add 5.00g of melamine and 9.00mL of mass concentration of 37% formaldehyde solution at room temperature to a three-necked flask containing 50.00mL of deionized water, add dropwise sodium carbonate solution to adjust the pH value to 8~9, stir and heat up to After 70°C, keep stirring and keep warm for 40 minutes. After the reaction is complete, an emulsified liquid is obtained and cooled to room temperature; add the cooled emulsified liquid to a flask containing 60.00g of APP, add 150.00mL of ethanol solution to stir, add dropwise Adjust the pH value of the formic acid solution to 3-4, slowly heat to 80°C, keep warm at this temperature for 2 hours, then stir to cool down, filter with suction, wash and dry, and finally get a white powder;

[0038] (2) Take 16.00g of microcrystalline cellulose, dissolve it in 140.00g of 64% concentrated sulfuric aci...

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Abstract

The invention belongs to the field of fire-retardant materials, and discloses a nanocellulose surface-modified core-shell structure fire retardant, and a preparation method and an application of the fire retardant. The nanocellulose surface-modified core-shell structure fire retardant integrates an acid source, an air source and a carbon source and takes ammonium polyphosphate as a core; a polymer capable of serving as the air source is coated on the surface of the core; and carbon-rich structure cellulose is adsorbed on an outermost layer. The fire retardant is an expansive fire retardant and has good fire-retardant efficiency; and a nanocellulose structure is arranged on the surface of the fire retardant, so that the compatibility of the fire retardant in a base material can be improved, and an influence of the traditional fire retardant particle on the mechanical property of a material can be reduced.

Description

technical field [0001] The invention belongs to the field of flame-retardant materials, and in particular relates to a nano-cellulose surface-modified core-shell structure flame retardant and its preparation method and application. Background technique [0002] With the increasing application of high molecular polymers in modern life, polymer flame retardant technology has developed rapidly. It has experienced the development process from halogen-based flame retardant to halogen-free flame retardant. The flame retardant system has been continuously enriched and perfected, among which Most of the phosphorus-based flame retardants have the advantages of low smoke, non-toxic, low-halogen, and halogen-free, which are in line with the development direction of flame retardants and have good development prospects. They have become a hot spot in flame retardant research. [0003] The intumescent flame retardant system is a flame retardant system with C, N, and P as the core componen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K9/10C08K3/32C08G12/32C08L75/04
Inventor 吴昆罗富彬赵强沈璐吕满庚
Owner 国科广化(南雄)新材料研究院有限公司
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