TY - JOUR
T1 - One-Step Preparation of Form-Stable Phase Change Material through Self-Assembly of Fatty Acid and Graphene
AU - Akhiani, Amir Reza
AU - Mehrali, Mohammad
AU - Tahan Latibari, Sara
AU - Mehrali, Mehdi
AU - Mahlia, Teuku Meurah Indra
AU - Sadeghinezhad, Emad
AU - Metselaar, Hendrik Simon Cornelis
PY - 2015/10/8
Y1 - 2015/10/8
N2 - For the first time, a one-step (self-assembly) method is introduced to prepare a phase change material (PCM) composite consisting of palmitic acid (PA) and minimal amount (0.6%) of oleylamine-functionalized reduced graphene oxide (OA-rGO) as a supporting material. Graphene oxide was reduced and functionalized with long chain alkylamine, oleylamine (OA), to adsorb palmitic acid (PA) and was simultaneously self-assembled into a three-dimensional structure. This technique eliminates common freeze-drying and impregnation steps since the phase change material is adsorbed in situ, and there was clearly no shrinkage during the drying process. In addition, the connected graphene network provides nuclei for the heterogeneous nucleation and crystallization of PA with an enhanced heat transfer to and from the PCM and retains excellent shape-stable property which prevents the leakage of molten PA. The obtained composites exhibit a large phase change enthalpy (99.6%), enhanced thermal conductivity (150%), excellent cycling performance, and substantial sunlight adsorption.
AB - For the first time, a one-step (self-assembly) method is introduced to prepare a phase change material (PCM) composite consisting of palmitic acid (PA) and minimal amount (0.6%) of oleylamine-functionalized reduced graphene oxide (OA-rGO) as a supporting material. Graphene oxide was reduced and functionalized with long chain alkylamine, oleylamine (OA), to adsorb palmitic acid (PA) and was simultaneously self-assembled into a three-dimensional structure. This technique eliminates common freeze-drying and impregnation steps since the phase change material is adsorbed in situ, and there was clearly no shrinkage during the drying process. In addition, the connected graphene network provides nuclei for the heterogeneous nucleation and crystallization of PA with an enhanced heat transfer to and from the PCM and retains excellent shape-stable property which prevents the leakage of molten PA. The obtained composites exhibit a large phase change enthalpy (99.6%), enhanced thermal conductivity (150%), excellent cycling performance, and substantial sunlight adsorption.
UR - http://www.scopus.com/inward/record.url?scp=84943745825&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.5b06089
DO - 10.1021/acs.jpcc.5b06089
M3 - Article
AN - SCOPUS:84943745825
SN - 1932-7447
VL - 119
SP - 22787
EP - 22796
JO - The Journal of physical chemistry C
JF - The Journal of physical chemistry C
IS - 40
ER -