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Flame-retardant molybdenum disulfide modified polystyrene composite material and preparation method thereof

A molybdenum disulfide and polystyrene technology, applied in the field of polystyrene, can solve the problems of poor dispersibility of peeling molybdenum disulfide, poor flame retardancy and thermal stability of polystyrene, achieve good ligand affinity, improve application range effect

Inactive Publication Date: 2021-05-11
宁波朗涌工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a flame-retardant molybdenum disulfide modified polystyrene composite material and its preparation method, which solves the problem of poor dispersion of the exfoliated molybdenum disulfide and solves the problem of polystyrene The problem of poor flame retardancy and thermal stability of ethylene

Method used

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  • Flame-retardant molybdenum disulfide modified polystyrene composite material and preparation method thereof
  • Flame-retardant molybdenum disulfide modified polystyrene composite material and preparation method thereof
  • Flame-retardant molybdenum disulfide modified polystyrene composite material and preparation method thereof

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preparation example Construction

[0024] In order to achieve the above object, the present invention provides the following specific embodiments and examples: a flame-retardant molybdenum disulfide modified polystyrene composite material, the preparation method comprising the following steps:

[0025] (1) Add the n-hexane solution of n-butyllithium and nano-molybdenum disulfide to the three-necked bottle, carry out hydrothermal stripping, dry the product after cooling, and disperse it in deionized water to obtain the exfoliated molybdenum disulfide dispersion;

[0026] (2) add exfoliation molybdenum disulfide dispersion liquid and 3-mercapto-1-propylamine in the three-neck bottle, wherein the mass ratio of exfoliation molybdenum disulfide and 3-mercapto-1-propanamine is 100:110-130, in Ultrasonic stirring reaction at 15-35°C for 20-30h, the product was centrifuged, washed and dried to obtain aminated molybdenum disulfide;

[0027] (3) Add toluene, aminated molybdenum disulfide and trichloroacetyl isocyanate in...

Embodiment 1

[0031] (1) Add the n-hexane solution of n-butyllithium and nano-molybdenum disulfide to the three-necked bottle, carry out hydrothermal stripping, dry the product after cooling, and disperse it in deionized water to obtain the exfoliated molybdenum disulfide dispersion;

[0032] (2) Add exfoliated molybdenum disulfide dispersion and 3-mercapto-1-propylamine in the three-necked bottle, wherein the mass ratio of exfoliated molybdenum disulfide and 3-mercapto-1-propylamine is 100:110, at 15 ℃ Under ultrasonic stirring reaction for 20h, the product was centrifuged, washed and dried to obtain aminated molybdenum disulfide;

[0033] (3) add toluene, amidated molybdenum disulfide and trichloroacetyl isocyanate in the three-necked flask, wherein the mass ratio of amidated molybdenum disulfide and trichloroacetyl isocyanate is 100:80, transfers in the oil bath, React at 70°C for 5 hours in a nitrogen atmosphere, centrifuge, wash and dry the product to obtain trichloroacetylmolybdenum d...

Embodiment 2

[0037] (1) Add the n-hexane solution of n-butyllithium and nano-molybdenum disulfide to the three-necked bottle, carry out hydrothermal stripping, dry the product after cooling, and disperse it in deionized water to obtain the exfoliated molybdenum disulfide dispersion;

[0038] (2) Add exfoliated molybdenum disulfide dispersion and 3-mercapto-1-propylamine in the three-necked bottle, wherein the mass ratio of exfoliated molybdenum disulfide and 3-mercapto-1-propylamine is 100:115, at 20 ℃ Under ultrasonic stirring for 22 hours, the product was centrifuged, washed and dried to obtain aminated molybdenum disulfide;

[0039] (3) add toluene, amidated molybdenum disulfide and trichloroacetyl isocyanate in the three-necked flask, wherein the mass ratio of amidated molybdenum disulfide and trichloroacetyl isocyanate is 100:90, transfers in the oil bath, React at 75°C for 6 hours in a nitrogen atmosphere, centrifuge, wash and dry the product to obtain trichloroacetylmolybdenum disul...

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Abstract

The invention relates to the technical field of polystyrene, and discloses a flame-retardant molybdenum disulfide modified polystyrene composite material. Nano molybdenum disulfide forms a LixMoS2 interlayer compound under hydrothermal stripping of n-butyllithium, single-layer nano molybdenum disulfide is obtained, surface sulfur atom defects are formed, the single-layer nano molybdenum disulfide can react with 3-mercapto-1-propylamine to obtain aminated molybdenum disulfide, the aminated molybdenum disulfide reacts with trichloroacetyl isocyanate to obtain trichloroacetyl molybdenum disulfide, carbon free radicals are formed at alpha carbon positions of halogen groups under the action of molybdenum hexacarbonyl, and the alpha carbon free radicals are used as active initiation sites to initiate styrene polymerization. Through a chemical bond connection mode, the interface affinity of molybdenum disulfide and polystyrene is improved, molybdenum disulfide has chemical barrier and catalytic char formation effects in a matrix, propagation of flammable volatile matters in a thermal decomposition process can be reduced, degradation and combustion in the polystyrene matrix are delayed, and the thermal stability and the flame retardant property of the polystyrene are improved.

Description

technical field [0001] The invention relates to the technical field of polystyrene, in particular to a flame-retardant molybdenum disulfide modified polystyrene composite material and a preparation method. Background technique [0002] Molybdenum disulfide is a new two-dimensional layered compound with graphene-like structure and properties. Due to its unique optical, electrical and thermal stability properties, it has a relatively wide range of applications in the fields of catalysts, light emitters and photodetectors. , has become a research hotspot in recent years. With the continuous in-depth research on molybdenum disulfide resistance, it has been found that nano-molybdenum disulfide is used as a functional filling material to be filled into organic polymer materials such as epoxy resin and polystyrene. , through the excellent performance of nano-molybdenum disulfide, improve the comprehensive properties of organic polymer materials such as epoxy resin and polystyrene, ...

Claims

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Application Information

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IPC IPC(8): C08L25/06C08L29/10C08L83/04C08L1/28C08K9/04C08K9/00C08K3/30C08K7/00
CPCC08K2003/3009C08K2201/011C08L25/06C08L2201/02C08L2201/08C08L2205/035C08L29/10C08L83/04C08L1/284C08K9/04C08K9/00C08K3/30C08K7/00
Inventor 罗忠民
Owner 宁波朗涌工贸有限公司
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