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ISBN: 978-1-56700-537-0

ISBN Online: 978-1-56700-538-7

ISSN Online: 2377-424X

International Heat Transfer Conference 17
August, 14-18, 2023, Cape Town, South Africa
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GRAPHENE OXIDE/POLYURETHANE-BASED COMPOSITE SOLID-SOLID PHASE CHANGE MATERIALS WITH ENHANCED PHOTOTHERMAL AND ENERGY STORAGE PROPERTIES

Get access (open in a dialog) DOI: 10.1615/IHTC17.320-10
8 pages
Jiawei Wang
School of Energy and Materials, Shanghai Polytechnic University, Shanghai 201209, China
Zihua Wu
School of Energy and Materials, Shanghai Polytechnic University, Shanghai 201209, China; Shanghai Thermophysical Properties Big Data Professional Technical Service Platform, Shanghai Engineering Research Center of Advanced Thermal Functional Materials, Shanghai 201209, China
Yuanyuan Wang
School of Environmental and Materials Engineering, Shanghai Polytechnic University, 2360 Jinhai Rd., Shanghai 201209, China; Research Center of Resource Recycling Science and Engineering, Shanghai Polytechnic University, 2360 Jinhai Road, Shanghai 201209, China
Huaqing Xie
School of Resources and Environmental Engineering, Shanghai Polytechnic University, No. 2360 Jinhai Rd., Pudong New Area, Shanghai 201209, China; Shanghai Engineering Research Center of Advanced Thermal Functional Materials, 2360 Jinhai Rd, Shanghai 201209, China

Abstract

Preparation of phase change materials (PCMs) with high energy storage, thermal conductivity and photothermal conversion capability is essential for improving solar energy conversion and storage. In this study, graphene oxide (GO) was incorporated into polyurethane (PU) prepared from 4,4'-diphenylmethane diissyanate (MDI) and polyethylene glycol (PEG). The thermophysical and photothermal properties of PU/GO composites were investigated systematically. Experimental results show that the increase in PEG content contributes to the enhancement of thermal energy storage density of PU/GO. The thermal conductivity and photothermal conversion efficiency of PU/GO increase with the increase in GO content. PU/GO composite PCMs exhibit enhanced thermal conductivity (0.972 Wm-1K-1) since the isocyanate in MDI can covalently graft with GO. In comparison, we found that PU/GO composites with 89wt% PEG and 1.72wt% GO has a good phase change enthalpy of 150.7 J/g and a high photothermal conversion efficiency (95.3%), better than previous works reported in PEG-based PCMs. In addition, it still has the advantage of relatively higher thermal conductivity. This furtherly confirms the composite PU/GO solid-solid PCMs have great potentials for efficient solar thermal energy storage and conversion.