Synthesis and Characterization of Capric Acid⁃Lauric Acid/Expanded Vermiculite as a Phase Change Composite for Energy Efficiency of Buildings

doi:10.12422/j.issn.1672-6952.2023.03.006

Journal of Liaoning Petrochemical University ›› 2023, Vol. 43 ›› Issue (3): 34-40.DOI: 10.12422/j.issn.1672-6952.2023.03.006

• Material Science and New Energy • Previous Articles Next Articles

Synthesis and Characterization of Capric Acid⁃Lauric Acid/Expanded Vermiculite as a Phase Change Composite for Energy Efficiency of Buildings

Xianghui Li(), Songyang Liu(), Ruixue Bai, Jiahui Zhang, Jianan Dai

School of Civil Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China

Received:2023-01-06 Revised:2023-02-22 Published:2023-06-25 Online:2023-06-25
Contact: Songyang Liu

建筑节能用癸酸⁃月桂酸/膨胀蛭石复合相变储热材料的制备及性能

李向辉(), 刘松阳(), 白瑞雪, 张佳晖, 戴佳楠

辽宁石油化工大学土木工程学院，辽宁抚顺 113001

通讯作者: 刘松阳
作者简介:李向辉（1999⁃），男，本科生，城市地下空间工程专业，从事太阳能储热材料方面的研究；E⁃mail：1332976783@qq.com。
基金资助:
辽宁省教育厅面上项目(LJKZ0405);国家级大学生创新创业训练计划项目(202210148014)

Abstract

Abstract:

In this paper, a kind of composite phase change material (capric?lauric acid/expanded vermiculite) using expanded vermiculite as the matrix and capric?lauric acid binary eutectic as the adsorbent was fabricated by vacuum impregnation technology. The chemical compatibility, morphology, stability，thermal?physical properties and reliability of the prepared composite capric?lauric acid/expanded vermiculite were investigated by fourier transform infrared spectrum (FT?IR), scanning electronic microscope (SEM), thermal gravimetric analyzer (TGA), differential scanning calorimeter (DSC) and thermal cycling test. The melting and solidification phase transition temperatures of capric?lauric acid/expanded vermiculite are 18.42 ℃ and 17.51 ℃, respectively. The latent heat of melting and solidification phase transition are 66.9 J/g and 62.9 J/g, respectively. Besides, the encapsulation amount of capric?lauric acid in expanded vermiculite can reach 52.97%, and it has good thermal stability between working temperature. Moreover, the capric?lauric acid/expanded vermiculite was used to substitute for a certain proportion of fine sand to prepare thermal storage mortar, the mechanical and thermal performance of capric?lauric acid/expanded vermiculite?based mortar was evaluated. The test result shows that prepared capric?lauric acid/expanded vermiculite?based thermal storage mortar is a potential material for building heat regulation and energy saving.

Key words: Expanded vermiculite, Capric?lauric acid, Leakage prevention, Building energy efficiency

摘要：

以膨胀蛭石为支撑材料，真空浸渍癸酸?月桂酸二元相变材料，合成了癸酸?月桂酸/膨胀蛭石复合相变储热材料；采用红外光谱仪、扫描电镜、热分析仪、差示扫描量热仪及热循环实验，对癸酸?月桂酸/膨胀蛭石复合相变材料的化学兼容性、微观形貌、稳定性、热物性及可靠性进行了分析。结果表明，癸酸?月桂酸/膨胀蛭石复合相变储热材料的融化和凝固相变温度分别为18.42 ℃和17.51 ℃，相变潜热分别为66.9 J/g和62.9 J/g；膨胀蛭石中癸酸?月桂酸的装载量可达52.97%，在工作温度范围内具有良好的热稳定性。此外，用癸酸?月桂酸/膨胀蛭石复合相变材料按一定比例替代细砂制备癸酸?月桂酸/膨胀蛭石基储能砂浆，对其力学及调温特性进行了研究。结果表明，癸酸?月桂酸/膨胀蛭石基储能砂浆具有应用于节能建筑的较大潜力。

关键词: 膨胀蛭石, 癸酸?月桂酸, 防渗漏, 建筑节能

CLC Number:

TQ177

Xianghui Li, Songyang Liu, Ruixue Bai, Jiahui Zhang, Jianan Dai. Synthesis and Characterization of Capric Acid⁃Lauric Acid/Expanded Vermiculite as a Phase Change Composite for Energy Efficiency of Buildings[J]. Journal of Liaoning Petrochemical University, 2023, 43(3): 34-40.

李向辉, 刘松阳, 白瑞雪, 张佳晖, 戴佳楠. 建筑节能用癸酸⁃月桂酸/膨胀蛭石复合相变储热材料的制备及性能[J]. 辽宁石油化工大学学报, 2023, 43(3): 34-40.

Figures/Tables 11

References 24

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w(癸酸⁃月桂酸)/%	D₀/mm	D_min/mm	D_max/mm	D/mm	L/%
50	30.0	0	0	0	0
60	30.0	30.0	31.0	30.5	1.6
70	30.0	35.0	42.0	38.5	28.3
80	30.0	41.0	46.0	43.5	45.0

w(癸酸⁃月桂酸)/%	D₀/mm	D_min/mm	D_max/mm	D/mm	L/%
50	30.0	0	0	0	0
60	30.0	30.0	31.0	30.5	1.6
70	30.0	35.0	42.0	38.5	28.3
80	30.0	41.0	46.0	43.5	45.0

样品	融化相变温度/℃	凝固相变温度/℃	融化相变潜热/（J·g^-1）	凝固相变潜热/（J·g^-1）
癸酸⁃月桂酸	19.18	17.21	126.3	125.4
癸酸⁃月桂酸/膨胀蛭石	18.42	17.51	66.9	62.9
癸酸⁃月桂酸/膨胀蛭石⁃1	18.89	16.70	65.7	61.5

样品	融化相变温度/℃	凝固相变温度/℃	融化相变潜热/（J·g^-1）	凝固相变潜热/（J·g^-1）
癸酸⁃月桂酸	19.18	17.21	126.3	125.4
癸酸⁃月桂酸/膨胀蛭石	18.42	17.51	66.9	62.9
癸酸⁃月桂酸/膨胀蛭石⁃1	18.89	16.70	65.7	61.5

样品	融化相变温度/℃	融化相变潜热/（J·g^-1）	凝固相变温度/℃	凝固相变潜热/(J·g^-1)	文献
石蜡/膨润土	41.70	39.8	43.40	39.0	[21]
石蜡/高岭土	27.50	25.3	33.50	32.9	[22]
棕榈酸/埃洛石	51.90	58.4	44.70	48.4	[23]
癸酸⁃肉豆蔻酸/膨胀珍珠岩	21.70	85.4	20.70	57.4	[24]
癸酸⁃月桂酸/膨胀蛭石	18.42	66.9	17.51	62.9	本文

Synthesis and Characterization of Capric Acid⁃Lauric Acid/Expanded Vermiculite as a Phase Change Composite for Energy Efficiency of Buildings

建筑节能用癸酸⁃月桂酸/膨胀蛭石复合相变储热材料的制备及性能

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Figures/Tables 11

References 24

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