Expanded Graphite/Paraffin/Silicone Rubber as High Temperature Form-stabilized Phase Change Materials for Thermal Energy Storage and Thermal Interface Materials
Abstract
:1. Introduction
2. Experimental
2.1. Materials
2.2. Preparation of EG/PW PCM
2.3. Preparation of SR and EG/PW/SR Composite
2.4. Characterization
3. Results and Discussion
3.1. Morphology of the EG/PW/SR Composites
3.2. Chemical Structure of EG/PW/SR Composites
3.3. Crystalline Characterization of EG/PW/SR Composites
3.4. Phase Change Properties of EG/PW/SR Composites
3.5. Thermal Stability of EG/PW/SR Composites
3.6. Form stability and Thermal Reliability of EG/PW/SR Composites
3.7. Heat Conduction Test
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
Nomenclature and Abbreviations:
∆T | super cooling (°C) |
∆K | melting temperature shift (°C) |
∆HT | theory calculated latent heat (J/g) |
∆Hm | melting latent heat (J/g) |
∆Hc | crystalline latent heat (J/g) |
Tm | melting temperature (°C) |
Tc | crystalline temperature (°C) |
∆H | measured total enthalpy (J/g) |
M0 | mass of initial samples (g) |
Mt | mass of samples weighted at specific time (g) |
mpw | mass of paraffin wax (g) |
r | pore radius (µm) |
t | thickness of PCM film in pores (µm) |
EG | expand graphite |
SR | Silicon rubber |
PW | Paraffin war |
wt | weight |
Vi-PDMS | polydimethylsiloxane vinyl terminated |
PMHS | polymethyl hydrosiloxane |
PCM | phase change material |
PCM-1 | phase change material with weight radio (EG:PW:SR=1:9:90) |
PCM-2 | phase change material with weight radio (EG:PW:SR=2:18:80) |
PCM-3 | phase change material with weight radio (EG:PW:SR=3:27:70) |
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Samples | Melting Process | Crystalline Process | - | - | - | - | ||
---|---|---|---|---|---|---|---|---|
Tm (°C) | ΔHm (J/g) | Tc (°C) | ΔHc (J/g) | ΔT (°C) | ΔH (J/g) | ΔHT (J/g) | ΔHloss (%) | |
PW | 53.8 | 172.3 | 49.1 | 170.1 | 4.7 | 171.2 | - | - |
EG/PW | 53.9 | 149.9 | 50.5 | 146.2 | 3.4 | 148.1 | 154.1 | 3.91 |
PCM-1 | 54.4 | 14.9 | 52.7 | 13.7 | 1.7 | 14.3 | 15.4 | 7.19 |
PCM-2 | 54.3 | 28.7 | 51.8 | 28.3 | 2.5 | 28.5 | 30.8 | 7.51 |
PCM-3 | 53.9 | 43.6 | 51.5 | 41.8 | 2.4 | 42.7 | 46.2 | 7.58 |
Samples | Melting Process | Crystalline Process | - | - | - | ||
---|---|---|---|---|---|---|---|
Tm (°C) | ΔHm (J/g) | Tc (°C) | ΔHc (J/g) | ΔT (°C) | ΔH (J/g) | ΔH Decrease (J/g) | |
PCM-3(Before baking) | 53.9 | 43.6 | 51.5 | 41.8 | 2.4 | 42.7 | - |
PCM-3(After baking) | 54.9 | 31.8 | 52.8 | 30.9 | 2.1 | 31.4 | 11.3 |
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Zhang, Y.; Li, W.; Huang, J.; Cao, M.; Du, G. Expanded Graphite/Paraffin/Silicone Rubber as High Temperature Form-stabilized Phase Change Materials for Thermal Energy Storage and Thermal Interface Materials. Materials 2020, 13, 894. https://doi.org/10.3390/ma13040894
Zhang Y, Li W, Huang J, Cao M, Du G. Expanded Graphite/Paraffin/Silicone Rubber as High Temperature Form-stabilized Phase Change Materials for Thermal Energy Storage and Thermal Interface Materials. Materials. 2020; 13(4):894. https://doi.org/10.3390/ma13040894
Chicago/Turabian StyleZhang, Yafang, Wang Li, Juhua Huang, Ming Cao, and Guoping Du. 2020. "Expanded Graphite/Paraffin/Silicone Rubber as High Temperature Form-stabilized Phase Change Materials for Thermal Energy Storage and Thermal Interface Materials" Materials 13, no. 4: 894. https://doi.org/10.3390/ma13040894