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A kind of bionic 3D printing aerogel insulation board and preparation method thereof

A thermal insulation board and 3D printing technology, applied in thermal insulation, additive processing, climate change adaptation, etc., can solve the problems of thermal insulation performance and unsatisfactory bulk density of thermal insulation board, and achieve lightweight thermal insulation performance optimization, fast printing, thermal conductivity The effect of coefficient reduction

Active Publication Date: 2022-08-09
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing thermal insulation boards are still not ideal in terms of thermal insulation performance and bulk density.

Method used

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  • A kind of bionic 3D printing aerogel insulation board and preparation method thereof
  • A kind of bionic 3D printing aerogel insulation board and preparation method thereof
  • A kind of bionic 3D printing aerogel insulation board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A manufacturing method of bionic 3D printing aerogel insulation board, the preparation flow chart is as follows image 3 shown, including the following steps:

[0047] (1) Weigh 20.83g of ethyl orthosilicate, 46.07g of ethanol and 18.02g of deionized water (the molar ratio of ethyl orthosilicate to ethanol and ionized water is 1:10:10), add 1.0415g of polydimethyl methacrylate Siloxane (the mass ratio of ethyl orthosilicate and polydimethylsiloxane is 1:0.05), adjust the pH of the system to 2 with 10% dilute hydrochloric acid, and hydrolyze it at 25°C for 24h to obtain SiO 2 colloidal solution;

[0048] (2) The molar ratio of ammonia water to ethyl orthosilicate is 0.003:1, and the ammonia water is diluted to 2 Equal volume of colloidal solution, SiO before printing 2 The colloidal solution and the dilute ammonia water are respectively transported to the tee pipe through two hoses through the peristaltic pump and mixed to obtain SiO 2 Precursor sol, pH value of mixe...

Embodiment 2

[0055] A method for manufacturing a bionic 3D printed aerogel thermal insulation board, comprising the following steps:

[0056] (1) Weigh 20.83g of ethyl orthosilicate, 23.04g of ethanol and 27.03g of deionized water (the molar ratio of ethyl orthosilicate to ethanol and ionized water is 1:5:15), add 0.8332g of polydimethyl methacrylate Siloxane (the mass ratio of ethyl orthosilicate and polydimethylsiloxane is 1:0.04), adjust the pH value of the system to 2 with 10% dilute hydrochloric acid, and hydrolyze it at 25 ° C for 24 h to obtain SiO 2 colloidal solution;

[0057] (2) The molar ratio of ammonia water to ethyl orthosilicate is 4×10 -3 , the ammonia water was diluted to 2 Equal volume of colloidal solution, SiO before printing 2 The colloidal solution and the dilute ammonia water are respectively transported to the tee pipe through two hoses through the peristaltic pump and mixed to obtain SiO 2 Precursor sol, pH value of mixed system is 6.6, SiO 2 The gel time of ...

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Abstract

The invention relates to a bionic 3D printing aerogel thermal insulation board and a preparation method thereof. The thermal insulation board consists of a support shell with an extremely small curved surface structure and SiO uniformly distributed in the gaps of the curved surface of the support shell. 2 Aerogel composition. The invention adopts the bionic minimal curved surface model to design the structure of the thermal insulation board, and selects extrudable gypsum-based cementitious materials that are easy to form and SiO with extremely low thermal conductivity. 2 Aerogel is used as raw material, and 3D printing technology is used to print thermal insulation boards with low apparent density. On the basis of ensuring strength, the tortuous pore wall structure of the board greatly reduces the heat loss in the thickness direction, and the filler SiO 2 The extremely low thermal conductivity of aerogels also reduces heat loss.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a bionic 3D printing aerogel thermal insulation board and a preparation method thereof. Background technique [0002] In recent years, my country's building energy consumption has continued to grow, of which heating and cooling account for a large proportion. In order to achieve low thermal conductivity and high thermal resistance to achieve the purpose of thermal insulation, thermal insulation boards are usually used as building exterior walls at this stage. , reduce the use frequency of heating and air conditioning, thereby reducing the energy consumption of the building, and the thermal insulation board can be prefabricated in the factory in advance and directly used for building installation, no additional processes are required, and the construction is convenient. However, the thermal insulation performance and bulk density of the existing thermal ins...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14E04B1/80B33Y70/10
CPCC04B28/14E04B1/80B33Y70/10C04B2111/00181C04B2201/20C04B2201/32C04B2201/50C04B24/383C04B24/14C04B14/102C04B2103/302Y02B80/10
Inventor 黄健赵雨婷江奇王新杨正才段斌
Owner WUHAN UNIV OF TECH