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Intumescent flame retardant, flame-retardant polylactic acid material and preparation methods of intumescent flame retardant and flame-retardant polylactic acid material

An intumescent flame retardant and polylactic acid technology, applied in the field of flame retardant polylactic acid materials and their preparation, intumescent flame retardants, can solve the problems such as the mechanical properties are not significantly increased, and achieve the effect of less environmental damage

Active Publication Date: 2019-11-01
南京塑煌新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Zhang et al. (Zhang M, et al. Journal of Materials Science, 2018, 53, 7083-7093) prepared ZIF-8-loaded graphene oxide (ZIF-8@GO) and added it to the polylactic acid matrix. The results showed that The addition of ZIF-8@GO improved the flame retardancy of PLA, and the droplet phenomenon of the composite was significantly improved, but the mechanical properties were not significantly increased.

Method used

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  • Intumescent flame retardant, flame-retardant polylactic acid material and preparation methods of intumescent flame retardant and flame-retardant polylactic acid material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: the preparation of intumescent flame retardant

[0029] (1) Dissolve 2.14g of 2-carboxyethylphenylphosphorous acid in 98mL of deionized water under heating in a water bath at 60-70°C, stir to dissolve completely to prepare 2wt% 2-carboxyethylphenylphosphorous acid Phosphoric acid aqueous solution is ready for use, add 4.5g chitosan to the above aqueous solution of 2-carboxyethylphenylphosphinic acid several times in small amounts, stir at 60-70°C for 5-6 hours, cool the reactant, precipitate with ethanol, The product is light yellow solid, and the reactant is dried for later use to obtain chitosan salt.

[0030] (2) For the graphene oxide prepared by the Hummers method, weigh 0.163g of graphene oxide and pour it into 100ml of methanol solution, and ultrasonically disperse it evenly; weigh 1.602g of 2-methylimidazole and 1.487g of zinc nitrate hexahydrate respectively Dissolved in 100ml of methanol; sequentially added to the methanol dispersion of graphene...

Embodiment 2

[0033] Weigh 9.5g of polylactic acid particles, add them to 40ml of chloroform solution and magnetically stir for 2 hours to dissolve completely; add intumescent flame retardant CHZ-1 to 20mL of chloroform solution and ultrasonically disperse them for 2 hours, then pour it into polylactic acid Stir in the chloroform solution for 4 hours, use a film coater to coat a film on a glass plate, place it at room temperature for 24 hours to evaporate the solvent, then release it in warm water, put it in an oven, place it at 50°C for 72 hours, and record it as PCHZ-1. Measured according to GB / T2406-1993 standard test method, the tensile strength is 47.5±0.5MPa, the limiting oxygen index is 24.2%, and the vertical burning level is V-2.

Embodiment 3

[0035] Weigh 9.5g of polylactic acid particles, add them into 40ml of chloroform solution and magnetically stir for 2 hours to dissolve them completely; add the intumescent flame retardant CHZ-2 into 20mL of chloroform solution and ultrasonically disperse them for 2 hours, then pour them into polylactic acid Stir in the chloroform solution for 4 hours, use a film coater to coat a film on a glass plate, place it at room temperature for 24 hours to evaporate the solvent, then release it in warm water, put it in an oven, place it at 50°C for 72 hours, and record it as PCHZ-2. Measured according to the standard test method of GB / T2406-1993, the tensile strength is 50.7±0.6MPa, the limiting oxygen index is 24.5%, and the vertical burning level is V-2 level.

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Abstract

The invention discloses an intumescent flame retardant, a flame-retardant polylactic acid material and preparation methods of the intumescent flame retardant and the flame-retardant polylactic acid material. The intumescent flame retardant consists of a chitosan salt and ZIF-8@GO in a mass ratio of (96-80):(4-20), the chitosan salt is prepared by reacting 2-carboxyethyl(phenyl)phosphinic acid withchitosan, and the ZIF-8@GO is prepared by loading a zeolite imidazate framework material ZIF-8 on graphene oxide; a chloroform solution of polylactic acid and a chloroform dispersion liquid of an intumescent flame retardant are blended according to a mass ratio of 95:5 by adopting a solution blending method, and coating is performed to prepare the flame-retardant polylactic acid material. The flame-retardant polylactic acid material is simple in formula, halogen-free and environment-friendly, the mechanical property and flame-retardant property of polylactic acid are remarkably improved, themolten drop phenomenon of the flame-retardant polylactic acid material is obviously weakened, a continuous and compact carbon layer is generated after combustion, and the effects of heat insulation and oxygen insulation are achieved.

Description

technical field [0001] The invention belongs to the technical field of polylactic acid materials, and relates to an intumescent flame retardant, a flame-retardant polylactic acid material and a preparation method thereof. Background technique [0002] Polylactic acid has the dual advantages of environment and resources, and is a biodegradable polymer material with potential and application value. Polylactic acid is widely used in various fields of life due to its excellent mechanical properties, easy processing and good biocompatibility. However, polylactic acid has problems such as flammability and severe molten droplets, and there is a great safety hazard, which greatly limits its application in the fields of automobiles, electronic appliances, etc. Therefore, the preparation of flame-retardant polylactic acid materials has become an inevitable research trend. [0003] Chitosan (CS) is a natural basic amino polysaccharide with polyhydroxyl groups. Due to its wide source,...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L5/08C08L87/00C08K9/12C08K3/04C08B37/08
CPCC08B37/003C08K9/12C08L5/08C08L67/04C08L87/00C08L2201/02C08L2203/16C08K3/042
Inventor 王新龙王康琪张咪丁晓庆王明詹亿兴
Owner 南京塑煌新材料科技有限公司
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