Natural aging of shape stabilized phase change materials based on paraffin wax |
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| Institution: | 1. Center for Advanced Materials, Qatar University, Doha 2713, Qatar;2. Materials Science and Technology Program, College of Arts and Sciences, Qatar University, Doha 2713, Qatar;3. Qatar Petrochemical Company (QAPCO), Doha 756, Qatar;1. BAM Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12005 Berlin, Germany;2. University of Applied Sciences Berlin, Luxemburger Str.10, 13353 Berlin, Germany;1. Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu, 212013, China;2. Beijing Institute of Aeronautical Materials, Beijing, 100095, China;1. Friedrich-Alexander-University Erlangen-Nürnberg, Institute of Polymer Technology, Am Weichselgarten 9, D-91058 Erlangen, Germany;2. Central South University, State Key Laboratory of High Performance and Complex Manufacturing, Lushan South Road 932, 410083 Changsha, China;1. Center of Advanced Elastomer Materials, Beijing University of Chemical Technology, Beijing 100029, PR China;2. Engineering Research Center of Elastomer Materials Energy Conservation and Resources, Ministry of Education, Beijing 100029, PR China;3. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, PR China;4. Analysis and Test Center, Beijing University of Chemical Technology, Beijing 100029, PR China |
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| Abstract: | Natural aging of shape-stabilized phase change materials containing linear low density polyethylene (LLDPE), paraffin wax and expanded graphite (EG) in Qatari climate has been studied. It was found that expanded graphite significantly improved the performance of prepared SSPCMs in multiple ways. Firstly, EG suppressed leakage of paraffin wax from the compact shape of SSPCMs. The addition of 15 wt% of EG to shape stabilized phase change materials (SSPCMs) containing 50 wt% of wax caused a decreasing in the leakage of wax by 50% over 210 days of natural aging.Secondly, ∖expanded graphite enhanced the photochemical stability of the blends; this was confirmed by FTIR analysis, where carbonyl index decreased with EG content. |
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| Keywords: | Phase change materials Thermal storage Natural aging Paraffin wax Expanded graphite |
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