高导热膨胀石墨/棕榈酸定形复合相变材料的制备及储热性能研究

被引：46

作者：

吴韶飞

闫霆

蒯子函

潘卫国

机构：

[1] 上海电力大学能源与机械工程学院

来源：

化工学报 | 2019年 / 70卷 / 09期

关键词：

棕榈酸; 膨胀石墨; 定形; 相变材料; 制备; 储热性能;

D O I：

暂无

中图分类号：

TB34 [功能材料];

学科分类号：

080906 [电磁信息功能材料与结构];

摘要：

采用棕榈酸(palmitic acid, PA)作为相变材料,膨胀石墨(expanded graphite, EG)作为添加基质,通过"熔融共混-凝固定形"工艺制备了PA/EG定形复合相变材料以提高相变材料的综合性能。预测并制备了21种不同配比的定形复合相变材料,对其形貌结构和孔隙率进行了微观表征与理论分析,并在此基础上对样品进行了传热性能分析、热物性测试、热稳定性研究和储热性能分析。SEM形貌分析显示所使用工艺可使棕榈酸能较好地被吸附于膨胀石墨的孔隙结构并使之均匀分布;DSC测试结果表明定形复合相变材料[70%(质量) PA]的焓值为193.01 J/g,纯PA的焓值为275.35 J/g,对应于熔点分别为61.08℃和59.53℃。EG的添加,可有效提高相变材料的热导率。当样品密度为900 kg/m3,EG含量为30%(质量)时,定形复合相变材料的热导率为14.09 W/(m·K),相比于纯PA [0.162 W/(m·K)]提高约87倍;对制备的样品进行50次循环稳定性实验,EG含量为24%(质量)和30%(质量)的样品形态均未出现明显变化,表现出良好的充放热循环稳定性。

引用

页码：3553 / 3564+3207 +3207

页数：13

共 32 条

[1]

碳复合材料的微观结构调控及性能研究 [D].

秦盟盟 .

天津大学,

2017

[2]

Palmitic acid/polyvinyl butyral/expanded graphite composites as form-stable phase change materials for solar thermal energy storage.[J].Yaxue Lin;Chuqiao Zhu;Guruprasad Alva;Guiyin Fang.Applied Energy.2018,

[3]

Construction of CNTCr-MIL-101-NH 2 hybrid composite for shape-stabilized phase change materials with enhanced thermal conductivity.[J].Jingjing Wang;Xiubing Huang;Hongyi Gao;Ang Li;Chen Wang.Chemical Engineering Journal.2018, @

[4]

Melting performance enhancement of phase change material by a limited amount of metal foam: Configurational optimization and economic assessment.[J].Yang Xu;Ming-Jia Li;Zhang-Jing Zheng;Xiao-Dai Xue.Applied Energy.2018,

[5]

Review on thermal conductivity enhancement; thermal properties and applications of phase change materials in thermal energy storage.[J].Yaxue Lin;Yuting Jia;Guruprasad Alva;Guiyin Fang.Renewable and Sustainable Energy Reviews.2018, P3

[6]

Thermal performance of copper foam/paraffin composite phase change material.[J].Huanpei Zheng;Changhong Wang;Qingming Liu;Zhongxuan Tian;Xianbo Fan.Energy Conversion and Management.2018,

[7]

Introduction of organic-organic eutectic PCM in mesoporous N-doped carbons for enhanced thermal conductivity and energy storage capacity.[J].Dimberu G. Atinafu;Wenjun Dong;Xiubing Huang;Hongyi Gao;Ge Wang.Applied Energy.2018,

[8]

Erythritol-Vermiculite form-stable phase change materials for thermal energy storage.[J].Guanghui Leng;Geng Qiao;Guizhi Xu;Thibault Vidal;Yulong Ding.Energy Procedia.2017,

[9]

Advancement in phase change materials for thermal energy storage applications.[J].Karunesh Kant;A. Shukla;Atul Sharma.Solar Energy Materials and Solar Cells.2017,

[10]

A review for phase change materials (PCMs) in solar absorption refrigeration systems.[J].Mohammed Mumtaz A. Khan;R. Saidur;Fahad A. Al-Sulaiman.Renewable and Sustainable Energy Reviews.2017,

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