Journal
ACS APPLIED POLYMER MATERIALS
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsapm.2c01027
Keywords
emulsion; encapsulation; latent heat storage; flexibility; phase change materials; light to heat conversion
Funding
- National Natural Science Foundation of China
- Natural Science Foundation of Jiangsu Province
- Postgraduate Research & Practice Innovation Program of Jiangsu Province
- [21805200]
- [BK20180847]
- [SJCX21_1345]
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This study reports on the fabrication of phase-change material-encapsulated polyHIPE composites with good flexibility and enhanced light/electro to heat conversion. The composites exhibited high heat capacity, good encapsulation, and reusability, as well as enhanced light/electro to heat conversion efficiency even at low carbon nanotube content. These properties make the polyHIPE composites excellent candidates for latent heat storage and light/electro to heat conversion.
Emulsion-templated, phase change material-encapsulated, mono-lithic polyHIPE composites are promising for latent heat storage, but their rigidity and low energy conversion limit the real applications. Here, we report the fabrication of phase-change material (octadecane, OD)-encapsulated polyHIPE composites with good flexibility and enhanced light/electro to heat conversion from surfactant-free emulsions. The composites were formed from interfacial cross-linking between isocynate and surface-modified carbon nanotubes and aminated cellulose nanocrystals which served as OD-in-water emulsion stabilizers. The resulting composites were flexible and exhibited robust compression (without failure even at 70% compressive strain), good encapsulation, high heat capacity (up to 220 J/g), and good reusability. Moreover, the composites exhibited enhanced light/electro to heat conversion efficiency (up to 90%), even at a low carbon nanotube content of around 0.1 wt %. These advantageous properties enabled the polyHIPE composites to be excellent candidates for latent heat storage and for light/electro to heat conversion.
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