Expandable polystyrene beads prepared from expandable few-layer graphene and preparing method of expandable polystyrene beads

A technology of expandable polystyrene and few-layer graphene, applied in the field of polystyrene foam materials, can solve the problems of high preparation cost, complicated process, unsatisfactory flame retardant and heat insulation performance, and achieve good heat insulation performance Effect

Active Publication Date: 2016-07-06
JILIN YUNTING ENERGY SAVING TECH CO LTD
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Problems solved by technology

[0006] CN103819597A discloses a kind of " preparation method of expandable polystyrene polymer containing graphene " because the graphene majority that Hummers method makes belongs to single-layer graphite, no longer expands (interlayer is opened) when encountering high temperature, can't achieve Asphyxiation of flame, insulation of heat radiation and contac

Method used

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preparation example Construction

[0023] The preparation method of the expandable polystyrene beads of expandable few-layer graphene comprises the following steps:

[0024] A, the preparation of graphite intercalation compound: take the natural flake graphite of 1000-5000 order as the anode with the average particle diameter, the metal titanium flake is as the cathode, and the concentrated sulfuric acid with the concentration of 98% is the intercalation agent, under 1.8V voltage. Chemical intercalation, the intercalation time is 0.5-2.0 hours, and the graphite interlayer compound is prepared;

[0025] B, the preparation of few-layer graphene: above-mentioned graphite interlayer compound is in the concentrated sulfuric acid solution that concentration is 98%, implements ultrasonic vibration stripping 05-1.5 hour under 1000W power, makes few-layer graphene;

[0026] C, the preparation of expandable few-layer graphene: take the concentrated sulfuric acid of concentration 98% as intercalation agent, the hydrogen p...

Embodiment 1

[0029] A, the preparation of graphite interlayer compound: the average particle size is 1000 mesh natural flake graphite as the anode, the metal titanium sheet as the cathode, and the concentrated sulfuric acid with a concentration of 98% as the intercalation agent, and the electrochemical intercalation is carried out at a voltage of 1.8V layer, the intercalation time is 2.0 hours, and the graphite intercalation compound is obtained.

[0030] B. Preparation of few-layer graphene: the above-mentioned graphite interlayer compound was peeled off by ultrasonic vibration for 1.5 hours at a power of 1000W in a concentrated sulfuric acid solution with a concentration of 98%, to prepare few-layer graphene.

[0031] C, the preparation of expandable few-layer graphene: use the concentrated sulfuric acid of concentration 98% as intercalation agent, the hydrogen peroxide of concentration 30% is as oxidizing agent, carry out chemical method secondary intercalation to above-mentioned obtaine...

Embodiment 2

[0034] A. Preparation of graphite intercalation compound: take natural flake graphite with an average particle size of 3000 meshes as the anode, metal titanium sheet as the cathode, and use concentrated sulfuric acid with a concentration of 98% as the intercalation agent, and perform electrochemical intercalation at a voltage of 1.8V layer, the intercalation time is 1.0 hour, and the graphite intercalation compound is prepared.

[0035] B. Preparation of few-layer graphene: the above-mentioned graphite interlayer compound was peeled off by ultrasonic vibration for 1.0 hour at a power of 1000W in a concentrated sulfuric acid solution with a concentration of 98%, to prepare few-layer graphene.

[0036] C, the preparation of expandable few-layer graphene: use the concentrated sulfuric acid of concentration 98% as intercalation agent, the hydrogen peroxide of concentration 30% is as oxidizing agent, carry out chemical method secondary intercalation to above-mentioned obtained few-l...

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Abstract

The invention relates to expandable polystyrene beads prepared from expandable few-layer graphene and a preparing method of the expandable polystyrene beads.Electrochemical intercalation is carried out on natural flake graphite with concentrated sulfuric acid, and a graphite interlayer compound with the interlayer space enlarged is obtained; few-layer graphene is obtained through ultrasonic concussion layer removing, the few-layer graphene is subjected to secondary intercalation with a chemical method, water washing and drying, and the expandable few-layer graphene is obtained; then, the expandable few-layer graphene and polystyrene monomers are subjected to suspension polymerization, and the expandable polystyrene beads prepared from the expandable few-layer graphene is obtained.According to the expandable polystyrene beads prepared from the expandable few-layer graphene and the preparing method of the expandable polystyrene beads, the expandable few-layer graphene is introduced into expandable polystyrene, and expandable graphene can be highly and uniformly dispersed in the expandable polystyrene beads, so that high infrared reflectivity in a cavity of expandable polystyrene is ensured, the heat insulation performance is good, and the expandable few-layer graphene can show the flame-retardant effects of smothering flames and insulating heat radiation.The flame retardant grade of a foam plate prepared from the expandable polystyrene beads reaches the B1 grade, and the heat conductivity value ranges from 0.028 W/(m.K) to 0.032 W/(m.K).

Description

technical field [0001] The invention relates to a polystyrene foam material, especially expandable polystyrene beads containing expandable few-layer graphene with high flame retardancy and low thermal conductivity and a preparation method. Background technique [0002] Polystyrene foam is made of expandable polystyrene beads containing volatile liquid foaming agent, which are pre-expanded by heating. Because of its good thermal insulation and energy-saving properties, it is widely used in building materials, packaging and other fields. [0003] In order to obtain better flame retardant, thermal insulation effect: [0004] CN104231461A discloses "Graphite EPS Beads and Its Production Process". Polystyrene particles, foaming agent, surface-modified graphite powder and flame retardant are mixed to make graphite EPS beads. Because the graphite mixed is ordinary graphite, the number of layers is too many, the dispersion is not good, and it is easy to aggregate, resulting in ins...

Claims

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Application Information

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IPC IPC(8): C08F112/08C08F2/44C08F2/20C08F2/18C08K9/02C08K7/00C08K3/04C08J9/20
CPCC08F112/08C08J9/20C08J2325/06C08K3/04C08K7/00C08K9/02C08K2201/011C08F2/44C08F2/20C08F2/18
Inventor 侯树亭
Owner JILIN YUNTING ENERGY SAVING TECH CO LTD
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