Composite nanocapsule phase-change material and preparation method thereof
A technology of nanocapsules and phase change materials, applied in heat exchange materials, chemical instruments and methods, silicon oxide, etc., can solve problems such as difficult nanometer-sized composite nanocapsule materials, and achieve large specific surface area and high coating efficiency , the effect of reducing the damage of the capsule structure
Active Publication Date: 2013-10-09
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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The invention relates to a composite nanocapsule phase-change material and a preparation method thereof. The material is a nanocapsule which takes oil-phase paraffin as a core and a polymethyl methacrylate and silica composite material as a shell, wherein the primary particle size of the nanocapsule is 50 to 150 nm and the average particle size of nanocapsule is 50 to 400 nm. The polymethyl methacrylate has high cladding efficiency and a thick cladding shell layer is favorable for improving the heat stability and the structure stability of the material; the silica has the characteristics of high structural strength, heat stability, mechanical stability, chemical stability, high heat conductivity and the like and remedies the defect that the polymethyl methacrylate has relatively low stability, and the polymethyl methacrylate remedies the defects that the silica has low elasticity and compactness, so stability improvement is promoted; the nanocapsule has small particle size and large specific surface area, so the heat conduction efficiency can be further improved, the damage of the capsule structure caused by large volume change in a phase change process is reduced, and the stability is improved.
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Property | Measurement | Unit |
Particle size | 50.0 ~ 400.0 | nm |
The average particle size | 50.0 ~ 400.0 | nm |
The average particle size | 200.0 | nm |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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