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- Title
Thermodynamic study on expanded graphite-based multifunctional composite phase change materials for personal thermal management and medical protection.
- Authors
Song, Lingjun; Yang, Yukai; Hu, Haopan; Wang, Yitong; Jia, Xinlei; Sun, Lixian; Xu, Fen; Li, Bin; Yu, Ting; Zhang, Huanzhi; Zeng, Julan; Cao, Zhong
- Abstract
The low thermal conductivity and liquid-phase leakage of phase change materials seriously hinder their large-scale applications. Porous materials have been identified as an effective way to address the leakage and provide a thermally conductive network. Therefore, we designed an expanded graphite-based multifunctional composite phase change thermal storage materials for personal thermal management and antimicrobial in medical protection. Expanded graphite (EG) was used as the matrix, silver nanowires (Ag NWs) as the functional enhancement materials, and n-octadecane (OD) as the thermal storage materials. OD and Ag NWs were adsorbed in the porous structure of EG by vacuum-assisted impregnation. Finally, EG/Ag NWs/OD were combined with non-woven fabrics (N) by one-step hot pressing method to obtain EG/Ag NWs/OD-N composite with excellent comprehensive performance. With the mass ratio of EG to Ag NWs of 13:7, EG/Ag NWs/OD-N exhibited a thermal conductivity of 2.0130 W m−1 K−1, which was improved by 1070.3% compared with pure OD. EG/Ag NWs/OD-N has a melting enthalpy of 137.85 J·g−1 and a crystallization enthalpy of 128.97 J·g−1. In addition, EG/Ag NWs/OD-N display great antibacterial properties, thermal cycling stability, shape stability, and cycling persistence and showed excellent temperature control in protective clothing applications, offering great potential for large-scale applications.
- Subjects
HEAT storage; PHASE change materials; POROUS materials; THERMAL conductivity; THERMOCYCLING; TEMPERATURE control
- Publication
Journal of Thermal Analysis & Calorimetry, 2024, Vol 149, Issue 2, p595
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-023-12662-8