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

doi:10.12422/j.issn.1672-6952.2023.03.006

辽宁石油化工大学学报 ›› 2023, Vol. 43 ›› Issue (3): 34-40.DOI: 10.12422/j.issn.1672-6952.2023.03.006

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

收稿日期:2023-01-06 修回日期:2023-02-22 出版日期:2023-06-25 发布日期:2023-06-25
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)

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

摘要/Abstract

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

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

中图分类号:

TQ177

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.

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.

图/表 11

图1 癸酸?月桂酸/膨胀蛭石基储能砂浆制备流程示意图

表1 癸酸?月桂酸/膨胀蛭石的泄漏实验结果

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

图2 质量分数为50%～80%的癸酸?月桂酸/膨胀蛭石渗出圈测试结果

图3 癸酸?月桂酸、膨胀蛭石、癸酸?月桂酸/膨胀蛭石和癸酸?月桂酸/膨胀蛭石?1的FT?IR光谱

图4 膨胀蛭石、癸酸?月桂酸/膨胀蛭石、癸酸?月桂酸/膨胀蛭石?1、普通砂浆、储能砂浆的SEM图储能砂浆储能砂浆

图5 癸酸?月桂酸、癸酸?月桂酸/膨胀蛭石及癸酸?月桂酸/膨胀蛭石?1的DSC曲线

表2 癸酸?月桂酸、癸酸?月桂酸/膨胀蛭石及癸酸?月桂酸/膨胀蛭石?1的储热性能

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

表3 矿物基定形复合相变储能材料的相变温度及相变潜热的对比结果

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

图6 膨胀蛭石、癸酸?月桂酸和癸酸?月桂酸/膨胀蛭石的TG曲线

图7 实验测试装置示意图

图8 测试室中心的室内温度变化曲线

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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

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

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