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材料研究学报  2017, Vol. 31 Issue (8): 591-596    DOI: 10.11901/1005.3093.2016.730
  研究论文 本期目录 | 过刊浏览 |
脂肪酸/SiO2复合相变材料的制备和性能
李琳1, 李东旭1,2(), 张树鹏1, 王立国1
1 南京工业大学材料科学与工程学院 南京 210009
2 江苏先进生物与化学制造协同创新中心 南京 211189
Preparation and Properties of Fatty Acid/SiO2 Composite Phase Change Materials
Lin LI1, Dongxu LI1,2(), Shupeng ZHANG1, Liguo WANG1
1 College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
2 Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing 211189, China
引用本文:

李琳, 李东旭, 张树鹏, 王立国. 脂肪酸/SiO2复合相变材料的制备和性能[J]. 材料研究学报, 2017, 31(8): 591-596.
Lin LI, Dongxu LI, Shupeng ZHANG, Liguo WANG. Preparation and Properties of Fatty Acid/SiO2 Composite Phase Change Materials[J]. Chinese Journal of Materials Research, 2017, 31(8): 591-596.

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摘要: 

以癸酸(CA)、月桂酸(LA)、肉豆蔻酸(MA)和棕榈酸(PA)为相变材料并根据理论公式估算低共熔脂肪酸的组成配比和理论热性能,制备了4组三元低共熔脂肪酸。针对适用于夏炎热地区建筑领域的相变储能材料,选取月桂酸-肉豆蔻酸-棕榈酸(LA-MA-PA)为相变芯材,用溶胶-凝胶法制备了LA-MA-PA/SiO2复合相变材料,并测试了这种复合相变材料的结构和性能。结果表明:LA-MA-PA具有良好的热稳定性和结构稳定性,可均匀地嵌入到SiO2多孔网络结构中,且相变芯材与载体复合后无新物质生成。LA-MA-PA/SiO2球体颗粒光滑饱满,分散性良好其粒径约为3 μm,经历100次热循环后脂肪酸没有明显的渗漏。这种复合相变材料的相变温度和潜热分别为29.6℃和91.1 J/g,具有良好的热稳定性。

关键词 无机非金属材料低共熔脂肪酸溶胶-凝胶法二氧化硅复合相变材料    
Abstract

With capric acid (CA), lauric acid (LA), palmitic acid (PA), and myristic acid (MA) as raw materials, four kinds of ternary eutectic mixtures were prepared in consideration of the theoretical thermal property of the formed mixtures with the mass ratio of the three selected raw materials. Then LA-MA-PA/SiO2 composite phase change materials were prepared by sol-gel method and their structure and performance were characterized. The results show that LA-MA-PA was uniformly filled into the three-dimensional network of SiO2 and there was no chemical reaction between LA-MA-PA and SiO2. LA-MA-PA/SiO2 presented as smooth spherical particles with 3 μm in diameter, which exhibit smooth surface and good dispersibility. While the LA-MA-PA/SiO2 exhibited high-performance in energy storage with little leakage even after 100 thermal cycling. The phase change temperature and latent heat of the LA-MA-PA/SiO2 were determined to be 29.6℃ and 91.1 J/g.

Key wordsinorganic non-metallic materials    eutectic fatty acid    sol-gel method    silicon dioxide    composite phase change material
收稿日期: 2016-12-14     
ZTFLH:  TU522  
基金资助:“十二五”国家科技支撑计划课题(2014BAL03B04)
作者简介:

作者简介 李 琳,女,1983年生,硕士生

图1  CA、LA、MA和PA的DSC曲线
Samples Mass ratio Hm/Jg-1 Tm/℃
Hmcal Hmexp ΔHm Tmcal Tmexp ΔTm
CA-LA-MA 51.9:31.1:17.0 143.1 124.4 18.7 15.9 14.8 1.1
CA-LA-PA 56.6:33.9:9.5 144.8 130.8 14.0 17.7 13.5 4.2
CA-MA-PA 63.2:23.5:13.3 145.6 134.2 11.4 21.6 16.6 5.0
LA-MA-PA 49.5:31.8:18.7 158.7 155.3 3.4 29.8 30.2 -0.4
表1  低共熔脂肪酸的估算值和实测值对比
图2  LA-MA-PA/SiO2样品宏观图
图3  LA-MA-PA/SiO2样品热循环前后的SEM图
图4  样品的红外光谱分析
图5  LA-MA-PA及复合相变储能材料样品的DSC曲线
No. Composite PCMs Phase change temperature/℃ Latent heat/(Jg-1) References
1 Paraffin/diatomite 33.0 89.5 [13]
2 Lauric acid/EP 44.1 93.4 [14]
3 Capric-lauric/SiO2 19.6 71.3 [15]
4
5
Capric-myristic acid/EP
Paraffin/silica fume
21.7
58.39
85.4
56.19
[16]
[17]
6 LA-MA-PA/SiO2 29.6 91.1 present study
表2  本实验和文献中制备的复合相变材料的热物性对比
图6  LA-MA-PA及复合相变材料的TG曲线
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