Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 39, Pages 47174-47184Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c15670
Keywords
thermal conductivity; hybrid filler; synergistic effect; phase change composites; industrial waste heat recovery
Funding
- National Natural Science Foundation of China [52173036, 52073107]
- National Key Technology R&D Program of China [2020YFB1709301]
- Central University Basic Research Fund of China [2021XXJS035]
- Innovation and Talent Recruitment Base of New Energy Chemistry and Device [B21003]
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A novel CF/BN-based nested structure was used to prepare high thermal conductivity and mechanical strength PEG-based phase change composites through vacuum adsorption technology. The obtained PCCs showed excellent thermal conductivity, mechanical strength, and phase change enthalpy, suggesting huge application potential in industrial waste heat recovery.
The solid-liquid leakage and low thermal conductivity of organic phase change materials limit their wide range of applications. In this paper, a novel carbon fiber/boron nitride (CF/BN)-based nested structure was constructed, and then, a series of poly(ethylene glycol) (PEG)-based phase change composites (PCCs) with high thermal conductivity and mechanical strength were prepared via the simple vacuum adsorption technology by employing the CF/BN nested structure as the heat conduction path and supporting material and the in situ obtained cross-linking epoxy resin as another supporting material. The thermal conductivity of the obtained PCC is as high as 0.81 W/m K, which is 7.4 times higher than that sample without the CF/BN nested structure. The support of the double skeletons confers the obtained PCCs with excellent mechanical strength. Surprisingly, there is not any deformation for PCCs under the pressure of 128.5 times its own weight during the phase change process. In addition, the phase change enthalpy of the obtained PCC is as high as 107.9 J/g. All the results indicate that the obtained PEG-based PCCs possess huge application potential in the field of industrial waste heat recovery.
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