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Modified graphene EPS particles, preparation method of mortar and modified graphene EPS mortar

A graphene and modified technology, applied in the field of mortar preparation, modified graphene EPS mortar, and modified graphene EPS particles, can solve the problem of high thermal conductivity, compressive and flexural strength, low shrinkage crack resistance, thermal insulation Insufficient thermal insulation effect, etc., to achieve the effect of large specific surface area, improved shrinkage crack resistance, and improved microscopic morphology

Inactive Publication Date: 2021-09-21
重庆中科建筑科技(集团)有限公司
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Problems solved by technology

[0007] In view of the above-mentioned defects of the prior art, the present invention discloses a modified graphene EPS thermal insulation mortar and a preparation method thereof. The technical problem to be solved is that the existing EPS thermal insulation mortar has a high thermal conductivity and insufficient thermal insulation effect. Compressive flexural strength, low shrinkage cracking resistance, etc.

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  • Modified graphene EPS particles, preparation method of mortar and modified graphene EPS mortar
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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the examples. The materials in this example are not particularly specified, and they are all commercially available conventional building materials.

[0031] Modified graphene EPS particle of the present invention is prepared by following method:

[0032] The specific operation is to use 5% sodium borohydride to reduce the carboxyl and carbonyl groups around the 10% graphene sheet, and then fully react with 30% alkylbenzenesulfonic acid in an ice bath , successfully grafted sulfonic acid groups onto the graphene oxide sheet, and then reduced it with hydrazine with a mass ratio of 40% at 100°C to obtain sheet-modified graphene, and then combined it with styrene monomer , using a suspension polymerization method to polymerize polystyrene particles, and then polymerize and foam with n-pentane with a mass ratio of 15% at normal pressure 100°C to obtain graphene-modified polystyrene foam particles, and...

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Abstract

The invention discloses a preparation method of modified graphene EPS (Expandable Polystyrene) particles. The method comprises the following steps: (1) mixing 5% by mass of sodium borohydride and 10% by mass of lamellar graphene, then mixing with 30% by mass of alkyl benzene sulfonic acid, and carrying out ice bath for 2 hours at a temperature of -10 DEG C; (2) mixing with 40% by mass ratio of hydrazine, and performing heating at a temperature of 100 DEG C; (3) mixing with a styrene monomer, and performing polymerizing to form polystyrene particles by adopting a suspension polymerization method; (4) carrying out polymerization foaming on the graphene modified polystyrene foam particles and 15% by mass ratio of n-pentane at 100 DEG C under normal pressure to obtain graphene modified polystyrene foam particles; and (5) heating, pressurizing and foaming the graphene modified polystyrene foamed particles to prepare 15-25kg / m<3> particles. The invention solves the problems that: traditional EPS thermal insulation mortar is relatively high in heat conductivity coefficient, insufficient in thermal insulation effect, relatively low in compression and breaking strength, relatively low in shrinkage and cracking resistance and the like.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a modified graphene EPS particle, a preparation method of mortar and modified graphene EPS mortar. Background technique [0002] With the implementation of the goal of sustainable development proposed by our country, the construction industry is one of the industries that consume the most energy. Therefore, building energy conservation is the only way to build a resource-saving and environment-friendly society. Due to the advantages of low cost, simple construction and good thermal insulation performance, building thermal insulation mortar has become a widely used external wall thermal insulation material in recent years. Insulation mortar generally refers to the mortar composed of cementitious material, lightweight aggregate and other chemical admixtures, which can play a thermal insulation effect on building walls. According to different types of lightweight aggrega...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/14C08L25/06C08K9/04C08K3/04C04B28/04C04B38/08C04B111/34C04B111/40
CPCC08J9/141C08J9/009C04B28/04C04B2201/50C04B2201/20C04B2201/32C04B2201/10C04B2111/40C04B2111/343C08J2203/14C08J2325/06C04B16/08C04B18/08C04B14/24C04B38/08C04B24/383C04B24/26C04B16/0633
Inventor 席菲菲李昌州肖大海
Owner 重庆中科建筑科技(集团)有限公司
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