Nanocomposite phase change materials (PCMs) were prepared by adding silver nanoparticles to isotactic polypropylene (iPP) and an iPP/paraffin wax phase change materials. The Ag nanoparticles were found to be well dispersed in both iPP and the iPP/wax composite, and filler agglomeration was found to increase with increasing filler content. The nanoparticles did not significantly affect the modulus of the iPP on its own, but when Ag and paraffin ...
Author(s): Mamohanoe Patricia Molaba
Graphite nano-platelets (GnPs) were dispersed in polyethylene glycol (PEG)/polymethyl methacrylate (PMMA) to form a PEG/PMMA/GnPs composite organic form-stable phase change material. The effects of the incorporation of the GnPs on the morphological, structural, thermal, and electrical properties of the composite were then assessed. The experimental results indicated that the incorporation of the GnPs into the polymer increased the thermal and electrical conductivities, and it was concluded that ...
Author(s): Jiaoqun Zhu, Jun Wang, Lei Zhang, Weibing Zhou, Yan Wang
Ambient pressure dried hydrophobic silica aerogel monoliths were prepared via simultaneous solvent exchange and surface modification in order to minimize volume shrinkage and density. At room temperature, the obtained silica aerogels had a low density of 0.096 g/cm³, a high surface area and hydrophobicity, and a low thermal conductivity of 0.0217 W/m·K. The effect of heating on these properties was also determined. After the aerogel had been heated to 300°...
Author(s): Ai Du, Bin Zhou, Guangming Wu, Guangwu Liu, Guoqing Zu, Jun Shen, Xing Yuan Ni, Xingyuan Ni
This article is based on research that has been done to improve hydrogen storage systems with on-board reversible metal hydrides. The study involved the compaction of the sodium aluminum hydride particles, as well as the addition of either aluminum or expanded natural graphite (ENG) to the powders to determine how their addition affects the thermal conductivity. It was found that the compaction of the powders improved the volumetric capacity of ...
Author(s): B. A. van Hassel, B. Laube, D. Mosher, J. Holowczak, J. M. Pasini, L. Pryor, M. Gorbounov, R. Brown, X. Tang
Two organic phase change materials (PCMs) were investigated to determine their effects on the thermal management capabilities of electronics. The thermo-physical properties of n-eicosane and 1-hexadecanol were determined experimentally, and the two PCMs were then added to unfinned, and finned heat sinks. It was determined that a PCM with a high melting point is able to increase the time of protection from overheating; however, it was also determined that if ...
Author(s): Ke-Fa Cen, Li-Wu Fan, Rong-Hua Hong, Xiao Wang, Xin Fang, Xu Xu, Ya-Cai Hu, Yi Zeng, Yu-Qi Xiao, Zi-Tao Yu
