Graphene/layered double hydroxide composite flame retardant and preparation method of polystyrene nanometer flame-retardant composite material

A polystyrene nano-hydroxide technology, which is applied in the preparation and application of inorganic composite flame retardants, can solve the problems of agglomeration, low output, unfavorable flame retardant efficiency, etc., and achieve small addition, high flame retardant efficiency, The effect of reducing secondary harm

Inactive Publication Date: 2013-09-04
HOHAI UNIV
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Problems solved by technology

So far, there have been no reports of graphene / LDH composite materials being used as flame retardants, and the composite materials prepared by the above-mentioned method still have shortcomings such as low yield, graphene nanosheets, and LDH sheet agglomeration, which are not conducive to The play of its flame retardant efficiency in polymer materials

Method used

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  • Graphene/layered double hydroxide composite flame retardant and preparation method of polystyrene nanometer flame-retardant composite material
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  • Graphene/layered double hydroxide composite flame retardant and preparation method of polystyrene nanometer flame-retardant composite material

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Effect test

Embodiment 1

[0025]A preparation method of graphene / layered double hydroxide composite flame retardant and polystyrene nano flame retardant composite material, the steps are as follows:

[0026] (1) Prepare 1L 0.05g / L GO colloid (see Hummers WS, Offeman R E. Preparation of graphite oxide. J Am Chem Soc, 1958, 80: 1339 for the preparation method), and 0.2g CNTs (purchased from Chinese Academy of Sciences, Chengdu Organic Chemical Co., Ltd.) after acidification (see Han YQ, Shen MX, Lin XC, Ding B, Zhang LJ, Tong H, Zhang XG for the acidification method. Ternary phase interfacial polymerization of polypyrrole / MWCNT nanocomposites with core-shell structure. Synthetic Metals, 2012,162:753-758.) was added, and the mixture was ultrasonically dispersed in an ice bath for 2 hours to obtain a light black colloidal dispersion.

[0027] (2) Add 0.2 mol MgCl 2 (purchased from Nanjing Chemical Reagent Co., Ltd.) with 0.1molAlCl 3 (purchased from Nanjing Chemical Reagent Co., Ltd.) was successive...

Embodiment 2

[0029] Embodiment 2 A kind of preparation method of graphene / layered double hydroxide composite flame retardant and polystyrene nano-flame retardant composite material, its place different from embodiment 1 is that the concentration of GO colloid becomes 0.1g / L, the quality of CNTs becomes 1g, ultrasonic dispersion 2h becomes 6h; MgCl in step 2 2 to ZnCl 2 ; In step 3, the composite assembly is changed from 5 parts to 2 parts.

Embodiment 3

[0030] Embodiment 3. A preparation method of graphene / layered double hydroxide composite flame retardant and polystyrene nano flame retardant composite material, its difference from Example 1 is that the volume of GO colloid in step 1 is changed from 1L to 4L , the mass of CNTs changed to 4g, ultrasonic dispersion from 2h to 12h, and the composite assembly in step 3 changed from 5 parts to 1 part.

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Abstract

The invention relates to a graphene/layered double hydroxide composite flame retardant and a preparation method of a polystyrene nanometer flame-retardant composite material. The preparation method comprises the following steps of: dissolving a carbon nanotube into graphene oxide colloid; stirring and performing ultrasonic dispersion until the materials are dispersed uniformly; adding M<2+> salt and Al<3+> salt; adding urea; performing a reflux reaction to obtain a graphene/carbon nanotube/layered double hydroxide composite assembling body; mixing the composite assembling body and polystyrene resin; and performing melt extrusion to obtain the polystyrene nanometer flame-retardant composite material. The graphene/carbon nanotube/layered double hydroxide composite assembling body is prepared by dispersing carbon nanotubes by a graphene oxide nanosheet, controlling the pH value of the solution by the urea and reducing the graphene oxide into the graphene. The polystyrene nanometer flame-retardant composite material prepared by the melt extrusion method has excellent flame resistance and mechanical properties.

Description

technical field [0001] The invention relates to a preparation method of a halogen-free nano composite flame retardant, belonging to the technical field of preparation and application of inorganic composite flame retardants. Background technique [0002] Polystyrene is one of the five general-purpose plastics, and its products are widely used in various industries such as electrical appliances, decoration, construction, transportation, and military industry. However, polystyrene is very easy to burn. During the combustion process, the molten dripping is serious and a large amount of black smoke is released. Therefore, it is very necessary to treat it with flame retardant and smoke suppression to improve the safety of its application. Because the flame-retardant materials of halogen-based flame retardants will produce a large amount of toxic and corrosive smoke when they are burned, they will pollute and corrode the environment and molds. Based on the requirements of environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08K13/04C08K7/00C08K3/04C08K3/22B29C47/92B29C48/92
CPCB29C48/022
Inventor 韩永芹申明霞吴英郭义段鹏鹏袁宗阳
Owner HOHAI UNIV
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