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摘要
以八水合氢氧化钡[Ba(OH)2·8H2O]为相变材料,膨胀石墨(EG)为吸附骨架,采用多孔吸附法制备了膨胀石墨/八水合氢氧化钡复合相变材料,并对其过冷度及热循环稳定性进行了研究,并考察了5％、7％、10％、15%和20%这5种不同含量的膨胀石墨对复合相变材料过冷度及热循环稳定性的影响。结果表明:调整膨胀石墨的含量有利于改善膨胀石墨/八水合氢氧化钡复合相变材料的过冷度和热循环稳定性。7%膨胀石墨可将膨胀石墨/八水合氢氧化钡复合相变材料过冷度降低至1℃,且经100次、300次、400次、500次热循环后,其过冷度变化小于5℃,热循环稳定性良好。
Abstract
Expended graphite(EG)/barium hydroxide octahydrate (Ba(OH)2·8H2O) composite phase change material was prepared with porous adsorption method,and investigated the surpercooling and thermal cycle stability of the material.The result indicated that adjusting the content of EG was an effective way to reduce supercooling and improve thermal cycle stability of the material.After investigating the effects of five different contents of EG of 5%,7%,10%,15%,20% on the supercooling and thermal cycle stability of the materials,and the results shown that 7% of EG can reduce supercooling to 1℃.After thermal cycles of 100,300,400,500,the supercooling change less than 5℃,and the thermal cycle stability was very well.
关键词
八水合氢氧化钡
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膨胀石墨
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复合相变材料
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过冷度
Key words
barium hydroxide octahydrate
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expanded graphite
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composite phase change material
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supercooling
膨胀石墨/八水合氢氧化钡复合相变材料的制备及性能研究[J].
化工新型材料, 2021, 49(12): 179-182 DOI:10.19817/j.cnki.issn 1006-3536.2021.12.038
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