Phase-change thermoregulation microcapsule and preparing method thereof

A microcapsule and phase change technology, applied in the field of materials, can solve the problems of poor phase controllability in the phase change interval, high monomer toxicity, and small proportion of effective energy storage molecules, and achieve excellent performance, no volatile toxicity, and phase change Interval stable and controllable effect

Active Publication Date: 2014-08-27
傅伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent proposed by CN102505349A uses a mixed energy storage molecular system, and the phase controllability of the phase change interval is poor; the capsule obtained by interfacial polymerization has a small proportion of effective energy storage molecules; and the polyurea resin material used has relatively low monomer toxicity. Big

Method used

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  • Phase-change thermoregulation microcapsule and preparing method thereof
  • Phase-change thermoregulation microcapsule and preparing method thereof
  • Phase-change thermoregulation microcapsule and preparing method thereof

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Embodiment 1

[0039] The preparation of embodiment 1 phase-change thermoregulation microcapsules (butyl stearate 80%)

[0040] 80-mesh expandable graphite was treated with 150W microwave for 5-10s to form worm-like porous graphite, and 80% of the total mass fraction of graphite and phase change material (butyl stearate) was added with butyl stearate, treated at 80°C for 30 minutes, Stir well, and then process at 80°C for 30 minutes to complete the adsorption, and cool naturally to obtain phase-change temperature-regulated microcapsules.

[0041] The DSC phase change curve figure of gained phase change thermoregulation microcapsule is as follows image 3 As shown, Tm=20°C; Tc=12°C; ΔHm=63J / g; ΔHc=75J / g.

Embodiment 2

[0042] The preparation of embodiment 2 phase-change thermoregulation microcapsules (butyl stearate 85%)

[0043] 80-mesh expandable graphite was treated with 150W microwave for 5-10s to form worm-like porous graphite, and 85% of the total mass fraction of graphite and phase change material (butyl stearate) was added with butyl stearate, and treated at 80°C for 30 minutes. Stir well, and then process at 80°C for 30 minutes to complete the adsorption, and cool naturally to obtain phase-change temperature-regulated microcapsules.

[0044] The DSC phase change curve figure of gained phase change thermoregulation microcapsule is as follows Figure 4 As shown, Tm=19°C; Tc=13°C; ΔHm=65J / g; ΔHc=69J / g.

Embodiment 3

[0045] The preparation of embodiment 3 phase-change thermoregulation microcapsules (n-octadecane 80%)

[0046]Use 80-mesh expandable graphite, treat it with 150W microwave for 5-10s to form worm-like porous graphite, add n-octadecane with a total mass fraction of graphite and phase change material (n-octadecane) of 80%, treat at 80°C for 30 minutes, and stir well , treated at 80°C for 30 minutes to complete the adsorption, and cooled naturally to obtain phase-change temperature-regulated microcapsules.

[0047] The DSC phase change curve figure of gained phase change thermoregulation microcapsule is as follows Figure 5 As shown, Tm=33°C; Tc=17°C; ΔHm=127J / g; ΔHc≈130J / g.

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Abstract

The invention provides a phase-change thermoregulation microcapsule and a preparing method of the phase-change thermoregulation microcapsule. A graphite adsorption method is adopted for preparation. The method comprises the steps that firstly, expansible graphite is processed to form wormlike porous graphite; then, a phase-change material is added, wherein the phase-change material is butyl stearate or n-octadecane; adsorption is accomplished by heating; cooling is conducted and a sample is obtained. The prepared microcapsule has good stability performance and has a circulation phase-change behavior within the temperature range between 15 DEG C and 31 DEG C; the performance of the microcapsule is stable within the circulation phase-change zone between 0 DEG C and 50 DEG C. The method is free of volatilized toxicity, facilitates environment protection and is simple in operation and small in number of procedures, direct adsorption is achieved, package is not needed, and the good industrial application value is achieved.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a phase-change temperature-regulating microcapsule and a preparation method thereof. Background technique [0002] There are usually three phases of matter: solid, liquid and gas. Phase change refers to the process of changing from one phase state to another. Phase transition forms include: solid-solid; solid-liquid; liquid-gas; solid-gas. Phase transition is generally an isothermal or approximately isothermal process, and this temperature is called phase transition temperature. The phase change is accompanied by a large energy absorption or release, which is the latent heat of the phase change. [0003] Phase-change microcapsules are the phase-change materials in a specific temperature range coated with some polymer compounds or inorganic compounds by physical or chemical methods, and made into solid particles with a diameter of about 1-1000 μm that are normally...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02C09K5/06
Inventor 傅伟王兴
Owner 傅伟
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