Two-temperature phase-change temperature-variable swelled vermiculite plate and preparation method thereof

A technology of expanded vermiculite board and expanded vermiculite, which is applied in the field of phase change energy storage materials, can solve the problems of not realizing the integration of structure and function of building materials, increasing the amount of engineering, etc., and achieve the effect of saving packaging steps and simple preparation process

Active Publication Date: 2019-04-26
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two patents are based on the addition of phase-change plates on the basis of ordinary walls, which additionally increases the amount of engineering, and does not realize the structural and functional integration of building materials.

Method used

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  • Two-temperature phase-change temperature-variable swelled vermiculite plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Select 0.8mol / L sodium hydroxide solution to react with diatomaceous earth at 75°C for 1h, take the filtered and dried diatomite and pentadecane and stir at 40°C for 1h, then dissolve the blend at 40°C Ultrasonic treatment at ℃ for 1.5h to prepare diatomite composite phase change material; use 0.7mol / L sulfuric acid to react with expanded vermiculite at 60℃ for 1h, take filtered and dried expanded vermiculite and paraffin at 60℃ The exfoliated vermiculite composite phase change material was prepared by stirring for 2h under the same conditions, and then ultrasonically treating the co-melt at 60°C for 1h.

[0032] The dual-temperature expanded vermiculite board consists of the following components by mass: 15 parts of diatomite composite phase change material, 25 parts of expanded vermiculite composite phase change material, 40 parts of Portland cement, 0.4 part of water reducer, and 30 parts of water.

[0033]The preparation method of the dual-temperature phase-change t...

Embodiment 2

[0040] Select 0.5mol / L sodium hydroxide solution to react with diatomaceous earth at 65°C for 2h, take the filtered and dried diatomite and nonanoic acid and stir at 50°C for 1h, then dissolve the blend at 50°C Under the conditions of ultrasonic treatment for 1.5h, the diatomite composite phase change material was prepared; 0.6mol / L sulfuric acid was selected to react with expanded vermiculite at 75°C for 2h, and the filtered and dried expanded vermiculite and paraffin were heated at 70°C After stirring for 2h, the co-melt was ultrasonically treated at 70°C for 1h to prepare the expanded vermiculite composite phase change material.

[0041] The dual-temperature expanded vermiculite board consists of the following components by mass: 20 parts of diatomite composite phase change material, 30 parts of expanded vermiculite composite phase change material, 60 parts of Portland cement, 0.5 parts of water reducer, and 40 parts of water.

[0042] The preparation method of the dual-tem...

Embodiment 3

[0049] Select 1mol / L sodium hydroxide solution to react with diatomite at 65°C for 3h, take the filtered and dried diatomite and pentadecane and stir at 60°C for 1h, and then dissolve the blend at 60°C Under the conditions of ultrasonic treatment for 1.5h, the diatomite composite phase change material was prepared; 1mol / L sulfuric acid was selected to react with expanded vermiculite at 80°C for 4h, and the filtered and dried expanded vermiculite and paraffin were heated at 80°C After stirring for 2h, the co-melt was ultrasonically treated at 80℃ for 1h to prepare the expanded vermiculite composite phase change material.

[0050] The dual-temperature expanded vermiculite board is composed of the following components by mass: 10 parts of diatomite composite phase change material, 30 parts of expanded vermiculite composite phase change material, 40 parts of Portland cement, 0.5 parts of water reducer, and 35 parts of water.

[0051] The preparation method of the dual-temperature ...

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Abstract

The invention discloses a two-temperature phase-change temperature-variable swelled vermiculite plate and a preparation method thereof. The plate comprises the following raw materials: a kieselguhr phase-change composite material, a swelled vermiculite composite phase-change material, Portland cement and a water reduction agent, wherein the kieselguhr phase-change composite material has a phase-change temperature of 5-15DEG C, and latent heat of phase change is greater than or equal to 30 J / g; the swelled vermiculite composite phase-change material has a phase-change temperature of 25-40 DEG C, and the latent heat of phase change is greater than or equal to 80J / g. The kieselguhr phase-change composite material, the swelled vermiculite composite phase-change material, the Portland cement and the water reduction agent are uniformly stirred with water at a mass ratio of (10-30):(20-40):(30-60):(0.2-0.6):(20-40), and the mixture is cast, molded, maintained for two days and then demoulded to obtain the plate. According to the plate prepared with the method disclosed by the invention, micropore adsorption functions of swelled vermiculite and kieselguhr on phase-change materials are sufficiently taken into play, and structure-function integration of a building material is achieved while temperature adjustment efficiency is ensured; in addition, the plate can be cost in situ and playsroles in both winter and summer, and compared with other plates, the plate has a wider application range.

Description

technical field [0001] The invention relates to the technical field of phase-change energy storage materials, in particular to a dual-temperature phase-change temperature-regulating expanded vermiculite board and a manufacturing method thereof. Background technique [0002] The increasing shortage of energy makes improving energy efficiency and developing and utilizing renewable energy a worldwide problem to be solved. With the rapid development of the construction industry and the improvement of people's quality of life, building energy consumption has accounted for about one-third of the total energy consumption of the whole society, and it is showing a trend of continuous increase. In the next few decades or even longer-term social and economic development, the rapid development of the construction industry and urbanization will continue. According to the statistics of the Ministry of Construction, around 2030, my country's building energy consumption will account for 30%...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/40
CPCC04B28/04C04B2111/40C04B2201/50C04B22/062C04B14/08C04B24/00C04B22/141C04B14/204C04B24/36C04B2103/302C04B24/04
Inventor 李敏石军兵
Owner SOUTHEAST UNIV
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