TY - JOUR
T1 - Highly hydrophobic silanized melamine foam for facile and uniform assembly of graphene nanoplatelet towards efficient light-to-thermal energy storage
AU - Akhiani, Amir Reza
AU - Metselaar, Hendrik Simon Cornelis
AU - Ang, Bee Chin
AU - Mehrali, Mehdi
AU - Mehrali, Mohammad
N1 - Funding Information:
The authors were grateful for the research funding for this work from Fundamental Research Grant Scheme (FRGS), Ministry of Higher Education (MOHE), Malaysia (grant no. FP048-2019A). The authors would like to thank Fabia Beckstein from NETZSCH Gerätebau GmbH's Applications Laboratory in Selb, Germany, for her assistance with thermal conductivity measurement and analysis.
Publisher Copyright:
© 2022 The Author(s)
PY - 2022/8
Y1 - 2022/8
N2 - Solar-thermal technology based on phase change materials (PCMs) has received a lot of attention as a cost-effective and practical way to overcome solar energy intermittency. However, weak photothermal conversion ability and complex preparation processes have hindered the practical application of PCMs. In this work, a new approach for facile, uniform, and firm assembly of graphene nanoplatelet (GNP) through the reaction of graphene oxide (GO) with the silanized melamine foam (MF) is introduced. Here, the deposited amino siloxane layer not only promotes the adhesion and integrity of embedded GNP/GO nanosheets but also facilitates the synthetic route compared to the previous studies. Following the reduction of GO with oleylamine (OA), the hybrid GNP/rGO foams with an integrated network were obtained. The composite PCMs were prepared through the incorporation of paraffin wax (PW) into the hybrid structure. The high hydrophobicity and porosity of the GNP/rGO foams resulted in a high loading of paraffin wax (nearly 97 wt%) and thus large transition enthalpy of 182 J g-1. The GNP/rGO framework provided excellent solar-thermal storage efficiency of up to 92.2%. The PCM composite containing the highest content of GNP (6 wt%) revealed an enhanced thermal conductivity by 87% compared to the unmodified MF/PW composite.
AB - Solar-thermal technology based on phase change materials (PCMs) has received a lot of attention as a cost-effective and practical way to overcome solar energy intermittency. However, weak photothermal conversion ability and complex preparation processes have hindered the practical application of PCMs. In this work, a new approach for facile, uniform, and firm assembly of graphene nanoplatelet (GNP) through the reaction of graphene oxide (GO) with the silanized melamine foam (MF) is introduced. Here, the deposited amino siloxane layer not only promotes the adhesion and integrity of embedded GNP/GO nanosheets but also facilitates the synthetic route compared to the previous studies. Following the reduction of GO with oleylamine (OA), the hybrid GNP/rGO foams with an integrated network were obtained. The composite PCMs were prepared through the incorporation of paraffin wax (PW) into the hybrid structure. The high hydrophobicity and porosity of the GNP/rGO foams resulted in a high loading of paraffin wax (nearly 97 wt%) and thus large transition enthalpy of 182 J g-1. The GNP/rGO framework provided excellent solar-thermal storage efficiency of up to 92.2%. The PCM composite containing the highest content of GNP (6 wt%) revealed an enhanced thermal conductivity by 87% compared to the unmodified MF/PW composite.
KW - Latent heat
KW - Phase change material
KW - Shape stabilization
KW - Solar energy
KW - Thermal energy storage
KW - UT-Hybrid-D
UR - http://www.scopus.com/inward/record.url?scp=85135904516&partnerID=8YFLogxK
U2 - 10.1016/j.mtener.2022.101077
DO - 10.1016/j.mtener.2022.101077
M3 - Article
AN - SCOPUS:85135904516
SN - 2468-6069
VL - 28
JO - Materials Today Energy
JF - Materials Today Energy
M1 - 101077
ER -
