Preparation method of high-strength graphene expandable polystyrene board

A technology of expandable polystyrene and polystyrene particles, which is applied in the field of packaging materials, can solve the problems of high viscosity, easy to form kettle, dispersion difference, and high cost, and achieves expansion of application fields, stable polymerization process, and improved mechanical properties. Effect

Inactive Publication Date: 2017-05-17
JILIN YUNTING ENERGY SAVING TECH CO LTD
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  • Abstract
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Problems solved by technology

However, in the past, adding graphene directly into the polymerization kettle would lead to phenomena such as poor dispersion phase, water-oil stratification, long polymerization cycle, uncontrollable reaction, high viscosity in the middle of polymerization and easy to condense the kettle, etc., and the utilization of graphene The low efficiency will also cause the disadvantages of large dosage and high cost

Method used

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  • Preparation method of high-strength graphene expandable polystyrene board
  • Preparation method of high-strength graphene expandable polystyrene board
  • Preparation method of high-strength graphene expandable polystyrene board

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preparation example Construction

[0029] A kind of preparation method of high-strength graphene expandable polystyrene plate is characterized in that, comprises the following steps:

[0030] A, Graphene, sodium alkylsulfate, sodium alkylsulfonate and styrene are mixed homogeneously to prepare modified graphene pre-dispersion liquid, wherein graphene, sodium alkylsulfonate and sodium alkylsulfate and styrene The weight percentage is 0.1~1wt%, 0.05~0.1% and 0.01~0.1%;

[0031] B, preparation of oil-based mixed solution: the modified graphene pre-dispersion obtained in step A is moved into a stirring tank added with an oil-based dispersant and stirred evenly to obtain an oil-based mixed solution, the weight percentage of the oil-based dispersant and styrene is 0.1%;

[0032] C, preparation of graphene polystyrene particles by suspension polymerization:

[0033] C1. Add deionized water and dispersant to the reaction kettle and stir for 15-45 minutes, then slowly add the oil-based mixture obtained in step B to th...

Embodiment 1

[0047] A kind of preparation method of high-strength graphene expandable polystyrene plate is characterized in that, comprises the following steps:

[0048] A, 0.5kg graphene, 0.025kg alkyl sodium sulphate, 0.005kg alkyl sulfonate and 500kg styrene are mixed homogeneously, make modified graphene predispersion;

[0049] B, preparation of oil-based mixed solution: move the modified graphene pre-dispersion obtained in step A into a stirring tank added with polyvinyl alcohol and stir to obtain an oil-based mixed solution;

[0050] C, preparation of graphene polystyrene particles by suspension polymerization:

[0051] C1. Add 1500kg of deionized water and 0.5kg of active calcium carbonate into the reaction kettle and stir for 15-45 minutes, then slowly add the oil-based mixture obtained in step B into the reaction kettle, and check the dispersion of the mixture until it can be dissolved in water. Disperse into small oil droplets, then start to heat up, add 0.5kgPE800, 1.5kg bis(4-...

Embodiment 2

[0057] A kind of preparation method of high-strength graphene expandable polystyrene plate is characterized in that, comprises the following steps:

[0058] A, 2.5kg graphene, 0.035kg alkyl sodium sulphate, 0.015kg alkyl sulfonate and 500kg styrene are mixed homogeneously, make modified graphene predispersion;

[0059] B, preparation of oil-based mixed solution: move the modified graphene pre-dispersion obtained in step A into a stirring tank added with polyvinyl alcohol and stir to obtain an oil-based mixed solution;

[0060] C, preparation of graphene polystyrene particles by suspension polymerization:

[0061] C1. Add 1000kg of deionized water, 1.2kg of calcium phosphate and 0.01kg of sodium dodecylbenzenesulfonate into the reaction kettle and stir for 15-45min, then slowly add the oil-based mixture obtained in step B into the reaction kettle, Check the dispersion of the mixed liquid until it can be dispersed into small oil droplets in water, then start to heat up, and add...

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Abstract

The invention relates to a preparation method of a high-strength graphene expandable polystyrene board. The prepared product has the mechanical strength higher than that of other existing expendable polystyrene boards. The method comprises the several steps as follows: preparing a modified graphene pre-dispersion liquid; adding an oily dispersant to prepare an oily mixed liquid; preparing graphene polystyrene particles through suspension polymerization in a reaction kettle; finally, measuring mechanical properties after molding with pre-expansion, curing and board making processes. The prepared graphene expandable polystyrene board has excellent mechanical properties, has the tensile strength 400% higher than the national standard and has the compressive strength 200% higher than the national standard. With the adoption of the method, the application of expandable polystyrene in the packaging industry is expanded, expandable polystyrene is suitable for packaging industries with higher mechanical properties, such as packaging of precise instruments, packaging of spaceflight navigation parts and the like, and the advantages of polystyrene as a packaging material are played.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and relates to a preparation method of a high-strength graphene expandable polystyrene board. Background technique [0002] Graphene is a carbon atom with SP 2 The honeycomb planar thin film formed by the hybrid method is closely packed with carbon atoms, which is a quasi-two-dimensional material with a thickness of one atomic layer. Because of its unique structure and excellent electrical, mechanical, optical, chemical and thermal properties, it has become a research hotspot for many people. [0003] Expandable polystyrene (EPS) is an important packaging material. With the continuous research and development of high-end new products, people's requirements for the strength of packaging materials are also getting higher and higher. Usually, the method of improving the strength of expandable polystyrene packaging materials is mainly to increase the molecular weight of polystyrene, spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L23/06C08K3/04C08J9/14C08F112/08
CPCC08L25/06C08F112/08C08J9/141C08J2203/14C08J2325/06C08J2423/06C08L2203/14C08L2205/025C08L2205/03C08L2205/24
Inventor 侯树亭史继东李哲沈海滨谢娜娜卢杰
Owner JILIN YUNTING ENERGY SAVING TECH CO LTD
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