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A dual-temperature phase-change temperature-regulating expanded vermiculite board and its preparation method

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 increasing engineering quantity and failing to realize the integration of building material structure and function, and achieve the effect of saving packaging steps and simple preparation process

Active Publication Date: 2021-11-12
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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  • A dual-temperature phase-change temperature-regulating expanded vermiculite board and its preparation method

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 dual-temperature phase change temperature-regulating expanded vermiculite board and a preparation method thereof. The raw materials of the plate include diatomite phase change composite material, expanded vermiculite composite phase change material, portland cement and water reducer. The phase change temperature of the diatomite phase change composite material is 5-15°C, and the latent heat of phase change is ≥30J / g; the phase change temperature of the expanded vermiculite composite phase change material is 25-40°C, and the latent heat of phase change is ≥80J / g. Stir the diatomite phase change composite material, expanded vermiculite composite phase change material, portland cement, water reducer and water according to the mass ratio of 10~30:20~40:30~60:0.2~0.6:20~40 After uniform pouring, it can be demoulded after 2 days of curing. The plate prepared by the invention fully utilizes the micropore adsorption effect of expanded vermiculite and diatomite on phase change materials, and realizes the structural and functional integration of building materials while ensuring the temperature adjustment efficiency; in addition, the plate can be poured on site It works in both winter and summer, and has a wider range of applications than other boards.

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 Patents(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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