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摘要
以气相二氧化硅作为多孔吸附材料,对十二水磷酸氢二钠/五水偏硅酸钠/十水碳酸钠低共熔相变材料进行封装,通过控制气相二氧化硅含量,制备出不同吸附量的气相二氧化硅/三元无机水合盐定型相变材料。通过差示扫描量热仪、扫描电子显微镜、傅里叶变换红外光谱仪、X射线衍射仪和热重分析仪等多种测试手段,对定型相变材料的性能和结构进行表征。研究结果表明:气相二氧化硅的最佳含量为25%(质量分数),该条件下定型相变材料相变焓为95.96J/g;三元无机水合盐相变材料与气相二氧化硅只是单纯的物理混合,并未发生化学反应产生新物质,制备的定型相变热稳定性较好。
Abstract
Gas phase silica was used as a porous adsorption material to encapsulate sodium hydrogen phosphate dodecahydrate/sodium metasilicate pentahydrate/sodium carbonate decahydrate low eutectic phase change materials.By controlling the content of gas phase silica,the gas phase silica/ternary inorganic hydrate salt shape-stabilized phase change materials with different adsorption capacities were prepared.Through a variety of testing methods such as DSC,SEM,FT-IR,XRD and TGA,the performance and structure of the phase change materials were characterized.The research results showed that the optimal content of gas phase silica was 25% (mass fraction),and under this condition,the phase transition enthalpy was 95.96J/g.The ternary inorganic hydrated salt phase change material and gas silica were simply physically mixed,and did not react to produce new substances.The prepared shape-stabilized phase change materials had good thermal stability.
关键词
相变蓄能
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气相二氧化硅
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定型相变材料
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低碳节能
Key words
phase change energy storage
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gas phase silica
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shape-stabilized phase change materials
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low carbon energy saving
气相二氧化硅/三元无机水合盐定型相变材料的制备及性能表征[J].
化工新型材料, 2024, 52(5): 245-248 DOI:10.19817/j.cnki.issn1006-3536.2024.05.007
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基金资助
“十三五”国家重点研发计划(2018YFD1101001)
