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Geopolymer cement modified by graphene and epoxy resin and preparation method thereof

A technology of geopolymer cement and epoxy resin, applied in the preparation of geopolymer cement and in the field of geopolymer cement, can solve the problems of poor mechanical properties and low activity, and achieve a good quality, uniform composition and improved bending performance. Effect

Active Publication Date: 2018-12-04
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, because the raw material of geopolymer cement that people want to use is industrial waste residue, the activity in the polymerization reaction is too low, resulting in poorer mechanical properties than ordinary cement.

Method used

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  • Geopolymer cement modified by graphene and epoxy resin and preparation method thereof
  • Geopolymer cement modified by graphene and epoxy resin and preparation method thereof
  • Geopolymer cement modified by graphene and epoxy resin and preparation method thereof

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preparation example Construction

[0042] Embodiments of the present invention also relate to a method for preparing the above-mentioned geopolymer cement, the method comprising the following steps:

[0043] (1) Preparation of alkali activator

[0044] The alkali metal hydroxide is added into water to form a solution, and then the solution is added to the alkali metal silicate with a modulus of 3-4 and mixed uniformly to obtain an alkali activator, and the modulus of the alkali activator is 1-2.

[0045] Wherein, the modulus means the ratio of moles. For example: the chemical formula of alkali metal silicate is R 2 O nSiO 2 , n is SiO 2 with R 2 The ratio of the number of moles of O, called R 2 O nSiO 2 modulus.

[0046] In one embodiment of the present invention, the alkali metal hydroxide is sodium hydroxide and / or potassium hydroxide, and the alkali metal silicate is sodium silicate and / or potassium silicate. In parts by weight, the alkali metal hydroxide is 5-30 parts, the alkali metal silicate is 2...

Embodiment 1

[0068] Preparation of Hyperdispersed Graphene :

[0069] (1) 1g of graphite powder is mixed with 1g of sodium nitrate to obtain a mixture.

[0070] (2) In an ice-water bath, slowly add the mixture obtained in step (1) to 20 ml of concentrated sulfuric acid, stir and mix, slowly add 2 g of potassium permanganate, and continue stirring for 20 min.

[0071] (3) The reaction system obtained in step (2) was removed from the ice-water bath, placed in a water bath and heated to 35° C., and kept for 30 minutes.

[0072] (4) Add a hydrogen peroxide solution with a mass concentration of 30% to the reaction system obtained in step (3), and after reacting for 2 hours, no bubbles are generated in the system at this time. The reaction solution was suction-filtered with a microporous membrane, and the precipitate obtained by the suction filtration was washed with deionized water for several times until no sulfate was detected. Graphene oxide was obtained after the precipitate was vacuum-...

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Abstract

The invention relates to geopolymer cement modified by graphene and epoxy resin, wherein the geopolymer cement contains a graphene / epoxy resin composite material. The graphene / epoxy resin composite material is used as a modifier for the geopolymer cement, so graphene can be evenly dispersed in the geopolymer cement, and the problem of easy agglomeration of graphene in a bulk material is solved. The mechanical properties, including impact resistance, tensile performance and bending performance, of the prepared modified polymer cement are greatly improved. As a building material, the geopolymercement is good in quality, uniform in composition and easy to industrialize.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a geopolymer cement modified based on graphene and epoxy resin, and a preparation method of the geopolymer cement. Background technique [0002] Currently, geopolymer cement is the most promising substitute for ordinary cement. Geopolymer cement is made of clay (such as metakaolin), industrial waste slag or slag, and alkali activator as raw materials. It is obtained through chemical reaction at a lower temperature (50-180°C) and has the same properties as ceramics and ordinary cement. similar new material. Structurally speaking, geopolymer cement is an inorganic polymer composed of Si, O, and Al elements covalently linked into a skeleton, and its three-dimensional network structure is composed of silicon-oxygen tetrahedrons and aluminum-oxygen tetrahedrons. [0003] Due to the formation of 1 ton of ordinary cement will produce about 1 ton of CO 2 , while forming 1 ...

Claims

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Application Information

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IPC IPC(8): C04B12/00
CPCC04B12/005Y02P40/10
Inventor 郭思瑶王琰帅赵铁军候东帅万小梅
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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