Electromagnetic shielding geopolymer composite material, and preparation method and application thereof

A composite material and geopolymer technology, used in cement production and other directions, can solve the problems of poor dispersion of conductive fillers, and achieve the effects of low cost, excellent electromagnetic shielding function and wide source.

Active Publication Date: 2020-04-17
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a polymer composite material for electromagnetic shielding and its preparation method and application, so as to overcome the defect of poor dispersion of conductive fillers in the geopolymer matrix in the prior art

Method used

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  • Electromagnetic shielding geopolymer composite material, and preparation method and application thereof
  • Electromagnetic shielding geopolymer composite material, and preparation method and application thereof
  • Electromagnetic shielding geopolymer composite material, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044](1) First prepare a mixed solution of 180 mL of sulfuric acid (Sinopharm Group Chemical Reagent Co., Ltd., national drug code: 10021628) and 60 mL of nitric acid (Shanghai Titan Science and Technology Co., Ltd., product number: 10014528) with a volume ratio of 3:1 in a container. Add 1.5 g of carbon nanotubes (Nanjing Xianfeng Nano Material Technology Co., Ltd., article number: 100253) into 240 mL of mixed acid solution, and stir for 2.5 h. Then perform vacuum filtration and wash repeatedly with deionized water until the pH value of the carbon nanotubes is 7.0. The washed black powder was freeze-dried in a freeze dryer FD-1C-50 (Beijing Boyikang Experimental Instrument Co., Ltd.) for 48 hours to obtain dry and fluffy acidified carbon nanotube powder.

[0045] (2) prepare the mixed solution of absolute ethanol (Sinopharm Group Chemical Reagent Co., Ltd., national drug code: 10009228) and ammonia (Sinopharm Group Chemical Reagent Co., Ltd., national drug code: 10002128) wi...

Embodiment 2

[0053] Mix sodium silicate solution (Merck, Germany, product number: 338443-1L) with 1.5 g of sodium hydroxide particles (Shanghai Titan Technology Co., Ltd., product number: G19852K) at a weight ratio of 90:10 to obtain the sodium ion concentration It is an alkaline solution of 8mol / L. Add 0.35 g of the surface-treated carbon nanotubes in Example 1 to the above-prepared 10 mL of alkaline solution and ultrasonically disperse them for 30 minutes, and then mix them with the metakaolin whose weight ratio of the surface-treated carbon nanotubes is 100:3 , and then rotated at a speed of 2000r / min for 5min in a stirrer ARE-310 (Thinky Corporation, Japan) to obtain a homogeneously mixed slurry. Pour the slurry into a Teflon mold and seal the mold with tape. Then move the mold to an oven, solidify at 60°C for 24 hours, and demould after natural cooling to obtain a geopolymer composite ( figure 1 marked as (2)).

[0054] The geopolymer composite material ( figure 1 marked as (1))...

Embodiment 3

[0059] Mix sodium silicate solution (Merck, Germany, product number: 338443) with 2.0 g sodium hydroxide particles (Shanghai Titan Technology Co., Ltd., original product number: G19852K) in a weight ratio of 95:5 to obtain a sodium ion concentration of 10 mol / L alkaline solution. 0.5 g of the surface-treated carbon nanotubes in Example 1 were added to the above-prepared alkaline solution for ultrasonic dispersion for 30 minutes, and then mixed with metakaolin whose weight ratio of the surface-treated carbon nanotubes was 10:1, and then Rotate at a speed of 2000r / min for 5min in a stirrer ARE-310 (Thinky Corporation, Japan) to obtain a uniformly mixed slurry. Pour the slurry into a Teflon mold and seal the mold with tape. Then move the mold to an oven, solidify at 60°C for 24 hours, and demould after natural cooling to obtain a geopolymer composite ( figure 1 marked as (4)).

[0060] The geopolymer composite material ( figure 1 marked as (3)).

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Abstract

The invention relates to an electromagnetic shielding geopolymer composite material, and a preparation method and an application thereof. The composite material comprises 30-40 wt% of aluminosilicateminerals, 20-40 wt% of an alkali, 30-40 wt% of water and 1-10 wt% of an organic silicon modified conductive filler. The method comprises the following steps: dispersing a conductive filler subjected to acid pretreatment and organic silicon into a mixed solution, stirring, mixing the obtained organic silicon modified conductive filler with an alkaline solution, adding the aluminosilicate minerals,stirring, and curing. The geopolymer raw materials adopted in the method are wide in source, low in cost, environmentally friendly and recyclable, and the prepared geopolymer composite material has anexcellent electromagnetic shielding function.

Description

technical field [0001] The invention belongs to the field of geopolymer composite material and its preparation and application, in particular to an electromagnetic shielding geopolymer composite material and its preparation and application. Background technique [0002] Cement is an inorganic gel material that can harden in air or water after mixing with water, and can be mixed with sand, stone and other materials to form concrete. Concrete is the main material of modern engineering construction. The annual consumption of concrete in our country is as high as 1 billion cubic meters, so the annual consumption of cement is also very huge. [0003] Geopolymer is a new type of inorganic polymer. The main structure is composed of silicon-oxygen and aluminum-oxygen tetrahedrons, which are connected in a three-dimensional network in space. It was first proposed by the French scientist Joseph Davidovits in the 1970s. The main raw materials for the preparation of geopolymers are na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B20/02
CPCC04B28/00C04B20/023C04B2111/00258C04B22/00C04B22/062C04B14/026C04B24/42Y02P40/10
Inventor 刘万双钱怡帆张礼颖毕曙光
Owner DONGHUA UNIV
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