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Conductive geopolymer preparation method

A geopolymer and polymer technology, applied in the field of preparation of conductive geopolymers, can solve the problems of poor graphene dispersion effect and the like, and achieve the effect of good electrical conductivity

Active Publication Date: 2016-01-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because geopolymers need to use a large amount of alkaline solution as an activator in the preparation process, and graphene is prone to change in zeta potential in alkaline solution, causing mutual attraction between sheets to form agglomeration, so the general dispersion method is not suitable for graphite The dispersing effect of alkene in the geopolymer system is poor

Method used

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  • Conductive geopolymer preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1: Take 20g of graphene with a thickness of 0.8nm, an extended size of 2μm, and an oxygen content of 10%, and another 10g of sodium dodecylbenzenesulfonate and 120g of water, according to the weight of 1:0.5:6 Specific mixing, placed in a nano-sand mill with a grinding aid medium of high-strength glass beads and a grinding speed of 1000 rpm for grinding and dispersing for 2 hours, and then placed in a high-frequency ultrasonic dispersing machine with a vibration frequency of 40kHZ for 50 minutes. Minutes, obtain the graphene dispersion liquid of preliminary dispersion.

[0029] Step 2: Take 1.5 silicon modulus, 1800g of liquid sodium silicate solution with a solid content of 40%, 100g of the initially dispersed graphene dispersion, mix and stir at a weight ratio of 1:0.056, and then add the sodium silicate solution to the mixed solution. Mix 19 g of 1% sodium alginate by weight of the solution. Place it again in a nano-sand mill for grinding and dispersing for 2 h...

Embodiment 2

[0034] Step 1: Take 60g of graphene with a thickness of 1nm, an extended size of 3μm, and an oxygen content of 15%, and another 18g of sodium citrate and 300g of water, mix them in a weight ratio of 1:0.3:5, and place them in an auxiliary Grinding and dispersing for 1.5 hours in a nano-sand mill with high-strength ceramic beads and a grinding speed of 1500 rpm, and then placing it in a high-frequency ultrasonic dispersing machine with a vibration frequency of 45kHZ for 40 minutes to obtain preliminary dispersed graphite olefin dispersion.

[0035] Step 2: Take 2000g of liquid sodium silicate solution with a silicon modulus of 1.8 and a solid content of 45%, and 340g of the initially dispersed graphene dispersion, mix and stir at a weight ratio of 1:0.17, and then add the Mix solution weight 0.5% sodium carboxymethylcellulose 11.7g. Place it again in a nano-sand mill for grinding and dispersing for 1.5 hours, and further disperse in a high-frequency ultrasonic disperser for 40...

Embodiment 3

[0040] Step 1: Take 110g of graphene with a thickness of 1.2nm, an extended size of 4μm, and an oxygen content of 20%, and another 22g of polyvinylpyrrolidone and 440g of water, mix them in a weight ratio of 1:0.2:4, and place in The grinding aid medium is high-strength glass beads, and the grinding speed is 2000 rpm in a nano-sand mill for grinding and dispersing for 1 hour, and then placed in a high-frequency ultrasonic dispersing machine with a vibration frequency of 50kHZ for 30 minutes to obtain a preliminary dispersion. Graphene dispersion.

[0041] Step 2: Take 2200g of liquid sodium silicate solution with a silicon modulus of 2.2 and a solid content of 50%, 550g of the initially dispersed graphene dispersion, mix and stir at a weight ratio of 1:0.25, and then add the Mix 2.2 g of 0.08% sodium polyacrylate by weight of the solution. Put it again in the aforementioned nano-sand mill for grinding and dispersing for 1 hour, and further ultrasonically oscillate and dispers...

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Abstract

The present invention discloses a conductive geopolymer preparation method which comprises the following steps of: 1) mixing graphene and a dispersant A with water, and grinding and dispersing the mixture to obtain a preliminary dispersed graphene dispersion liquid; 2) mixing an alkali metal silicate solution with the graphene dispersion liquid obtained in the step 1), mixing the mixture uniformly and then adding a dispersant B, grinding and dispersing the mixture to obtain a graphene dispersed alkali-activated solution, wherein the modulus of the alkali metal silicate solution is 1-4, and the solid content is 30-60%; 3) mixing a silicon-aluminum raw material with granulated furnace slag, and grinding the mixture to obtain composite geopolymer powder; and 4) mixing the composite geopolymer powder obtained in the step 3) with the graphene dispersed alkali-activated solution obtained in the step 2), and stirring the mixture uniformly to obtain the conductive geopolymer. According to the present invention, the geopolymer has good conductivity, and meanwhile the mechanical property of the geopolymer is maintained.

Description

technical field [0001] The invention belongs to the field of inorganic gelling materials, and in particular relates to a preparation method of a conductive polymer. Background technique [0002] Geopolymer is a new type of inorganic material, which is formed by the dissolution and geopolymerization of active silicon-alumina materials in alkaline environment, and the matrix is ​​composed of [SiO 4 ] tetrahedron and [AlO 4 ] The three-dimensional space network structure formed by tetrahedral polymerization, the chemical structure presents an amorphous to semi-crystalline phase, its compressive strength can reach 40-80MPa, and the refractory temperature can reach 1100°C. Compared with traditional Portland cement, geopolymer has better thermal stability and corrosion resistance. Therefore, concrete and composite materials prepared with geopolymers as cementitious materials have higher temperature resistance and durability than traditional cement concrete materials and cement-b...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/02C04B111/94
CPCY02P40/10
Inventor 闫东明陈士堃
Owner ZHEJIANG UNIV
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