Thermal behaviour of paraffin wax-poly vinyl alcohol composite material
Polvmer additives binder svstem provides many properties useful In thermal energy storage (TES) then developed the efficient energy storage materials and green strength bodies system. This paper studies the thermal energy storage property for polyvinyl alcohol (PVOH) / paraffin wax (WPw) blends. To...
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Veröffentlicht in: | Ai-Khawarizmi engineering journal 2016, Vol.12 (2), p.18-26 |
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Sprache: | ara ; eng |
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Zusammenfassung: | Polvmer additives binder svstem provides many properties useful In thermal energy storage (TES) then developed
the efficient energy storage materials and green strength bodies system.
This paper studies the thermal energy storage property for polyvinyl alcohol (PVOH) / paraffin wax (WPw) blends.
To enhance paraffin wax thermal conductivity. PVOH as a material which high conductivity was employed. A fixed
weight of Paraffin wax was dispersed with PVOH heterogeneously at different additive weights ratios of PVOH/Pw
(50/50. 67/33. 75/25. and 80/20) wt. ratio respectively. The composite material was prepared using wetted pressing
method.
Both base materials (polyvinyl alcohol and paraffin wax) were scanned using differential scanning calorimeter
(DSC) under non-lsothermal conditions, the result was analysed to determine the thermal transition temperature of
PVOH and paraffin wax base material. The thermal decomposition of PVOH and waste paraffin wax proved that high
transition temperature (TG) for PVOH reached 209°c rather than wax of 60°c respectively. This result shows that
PVOH suppress the thermal stability of PVOH/waste paraffin wax composites. Afterward examines the thermal
conductivity enhancement using Lee- disk techniques. Composite materials PVOH/paraffln wax have a high thermal
conductivity which Increases thermal conductivity of waste paraffin wax as a heat storage media and this allows to
apply change In phase with wide range of temperatures, and the highest decreased ratio of phase-change heat Is very
low. compared to that of paraffin only. Therefore. PVOH. added to paraffin which has significant potential for
enhancing the thermal storage characteristics of paraffin.
A wax/PVOH system acts as strength body resistance to sever contact of both air and moisture then a moisture
absorbance percent was achieved by use both Fourier transform Infrared spectroscopy (FTIR) techniques and moisture
solutions (100 % H*0) for all pure and composite material system Pw/PVOH. the results shows high resistance to
ambient conditions (air/ moisture) for composite system rather than pure materials (PVOH and Pw). |
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ISSN: | 1818-1171 2312-0789 |