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| Preparation and Thermal Energy Storage Performance of High Thermal Energy Density MNCMF-CNT-PW Phase Change Composites |
| Received:February 20, 2025 Revised:March 06, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.07.007 |
| Key Words:paraffin wax cellulose aerogel phase change material thermal energy storage |
| Fund Project:广东省自然科学基金项目（2021A1515010538）；制浆造纸工程国家重点实验室项目（2020ZD02）；国家重点研发计划（2018YFC1902102）。 |
| Author Name | Affiliation | Postcode | | CHEN Jinxuan* | State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | HE Yingying | State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | CHEN Gang* | State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 |
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| Abstract:This study employed a vacuum impregnation method to prepare carboxymethylated cellulose fiber （CMF）-carbon nanotube （CNT）-paraffin wax （PW） composites with high phase change enthalpy. First， uniformly dispersed MNCMF-CNT aqueous solutions were prepared via high-speed shearing. Then， MNCMF-CNT aerogels with a porous structure were obtained by freeze-drying， with CNT uniformly distributed on the pore walls. Finally， the aerogels were vacuum-impregnated with PW， filling their pores and forming stable MNCMF-CNT-PW composites. The results showed that the incorporation of CNT improved the thermal conductivity of the phase change material from 0.283 to 0.327 W/(m·K). Additionally， MNCMF-CNT2-PW52 displayed high phase change enthalpy and latent heat retention， which made by paraffin wax with melting temperature of 52~54 ℃， with melting and crystallization enthalpies of 217.7 and 217.9 J/g， respectively， and a latent heat retention rate of 97.9%. Furthermore， MNCMF-CNT2-PW52 composites effectively collected， stored， and released thermal energy. When combined with a thermoelectric generator， they output electric energy consistently. |
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