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Phase change microcapsule temperature self-adjusting GRC dry-mixed mortar surface layer material

A phase change microcapsule and dry powder mortar technology, which is applied in the field of dry powder mortar for construction, can solve the problems of affecting the mechanical properties and durability of GRC materials, the effect of temperature regulation of phase change capsules, and being easy to break, so as to avoid the problem of breakage and improve the Automatic temperature adjustment function, the effect of improving thermal conductivity

Active Publication Date: 2015-08-05
江苏倍立达新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The organic film wrapped on the surface of the phase change capsule is easy to break during the mortar construction and mixing process, which greatly affects the temperature adjustment effect of the phase change capsule. At the same time, the cracked phase change material mixed into the GRC dry powder mortar affects the mechanical properties and durability of the GRC material. This is a problem that has plagued the application of phase change materials in cement concrete

Method used

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  • Phase change microcapsule temperature self-adjusting GRC dry-mixed mortar surface layer material

Examples

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Effect test

Embodiment example 1

[0033] (1) Put the commercially available phase-change microcapsules with a mass percentage of 77% into a vibrating mixer, spray water with a mass fraction of 5% under the condition of vibrating and stirring, so that the surface of the phase-change microcapsules is thoroughly wetted, and then add The mass fraction is 15% white cement and 3% carbon fiber, so that the surface of the phase change microcapsules is covered with a layer of white cement mixed with carbon fiber, shake and stir continuously at 25 °C for 24 hours, and dry at 50 °C to obtain the modified phase change microcapsules. capsule.

[0034] (2) Mix 35% white cement, 40% quartz sand, 1% redispersible latex powder, 0.5% powder polycarboxylate superplasticizer, 8% fly ash, 0.5% cellulose ether, 2% high dispersion Add permanent glass fiber, 2% inorganic toner, and 11% modified phase-change microcapsules into a stirrer and stir evenly to obtain phase-change microcapsule self-regulating GRC dry powder mortar surface m...

Embodiment example 2

[0036] (1) Put the commercially available phase-change microcapsules with a mass percentage of 88.5% into a vibrating mixer, spray water with a mass fraction of 3% under the condition of oscillating and stirring, so that the surface of the phase-change microcapsules is thoroughly wetted, and then add The mass fraction is 8% white cement and 0.5% carbon fiber, so that the surface of the phase change microcapsules is covered with a layer of white cement mixed with carbon fiber, shake and stir continuously at 20°C for 24 hours, and dry at 80°C to obtain the modified phase change microcapsules. capsule.

[0037] (2) Mix 40% white cement, 33% quartz sand, 0.2% redispersible latex powder, 0.1% powder melamine superplasticizer, 3% silica fume, 2% acicular wollastonite, 0.2% cellulose ether , 1.5% polypropylene fiber, 5% inorganic toner, and 15% modified phase-change microcapsules were added to the mixer and stirred evenly to obtain the phase-change microcapsule self-regulating temper...

Embodiment example 3

[0039] (1) Put commercially available phase-change microcapsules with a mass percentage of 80% into a vibrating mixer, and spray water with a mass fraction of 4% under the condition of oscillating and stirring, so that the surface of the phase-change microcapsules is thoroughly wetted, and then add The mass fraction is 14% white cement and 2% carbon fiber, so that the surface of the phase change microcapsules is covered with a layer of white cement mixed with carbon fiber, shake and stir continuously at 28°C for 20h, and dry at 60°C to obtain the modified phase change microcapsules. capsule.

[0040] (2) Mix 25% white cement, 45% quartz sand, 2% redispersible latex powder, 2% powder melamine superplasticizer, 5% silica fume, 2% wollastonite, 0.1% cellulose ether, Add 0.9% carbon fiber, 4% inorganic toner, and 14% modified phase-change microcapsules into the mixer and stir evenly to obtain the phase-change microcapsule self-regulating GRC dry powder mortar surface material.

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Abstract

The invention discloses a phase change microcapsule temperature self-adjusting GRC dry-mixed mortar surface layer material. The surface of a phase change microcapsule is coated with a layer of a cement material to make the phase change microcapsule have a hard shell in order to guarantee the integrity of the phase change microcapsule in the stirring processing process, and carbon fibers are added in order to improve the heat conduction performance of the outer wall of the phase change microcapsule. The phase change microcapsule dry-mixed mortar material produced in the invention can be applied to make the surface layer of glass fiber concrete (GRC), and the GRC produced in the invention has an excellent temperature self-adjusting function.

Description

technical field [0001] The invention relates to the field of dry powder mortar for construction, in particular to a production formula and production process of a dry powder mortar material. Background technique [0002] Phase change material (PCM) refers to a substance that changes shape with temperature and can provide latent heat. The process of a phase change material changing from solid to liquid or from liquid to solid is called a phase change process. At this time, the phase change material will absorb or release a large amount of latent heat. Microcapsule phase change material is a new type of composite phase change material with a core-shell structure formed by coating a layer of stable film on the surface of solid-liquid phase change material particles using microcapsule technology. During the phase change process, the phase change material as the inner core undergoes a solid-liquid phase transition, while the polymer film on the outer layer remains solid. Theref...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/06C04B24/38
Inventor 熊吉如王猛方寅生
Owner 江苏倍立达新材料科技有限公司
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