| 李云涛,晏华,汪宏涛,王群,赵思勰.正癸酸-月桂酸-硬脂酸三元低共熔体系/膨胀石墨复合相变材料的制备与表征[J].材料导报,2017,31(4):94-99 |
| 正癸酸-月桂酸-硬脂酸三元低共熔体系/膨胀石墨复合相变材料的制备与表征 |
| Preparation and Characterization of Decanoic Acid-Lauric Acid-Stearic Acid Ternary Eutectic Mixture/Expanded Graphene Composite Phase Change Material with a Low Eutectic Temperature |
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| DOI：10.11896/j.issn.1005-023X.2017.04.021 |
| 中文关键词: 三元脂肪酸 膨胀石墨 复合相变材料 热性能 正癸酸-月桂酸-硬脂酸 低共熔 |
| 英文关键词: ternary fatty acids, expanded graphite, composite phase change materials, thermal properties, decanoic acid-lauric acid-stearic acid, low eutectic temperature |
| 基金项目:国家自然科学基金(51272283) 李云涛:1989年生,硕士研究生,主要研究方向为相变材料及水泥 E-mail:1026774457@qq.com 晏华:通讯作者,男,博士,教授,博士研究生导师,研究方向为相变材料、磁流变材料 E-mail:1464938458@qq.com |
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| 中文摘要: |
| 将正癸酸(DA)、月桂酸(LA)和硬脂酸(SA)熔融共混制备了三元体系相变材料(DA-LA-SA),以DA-LA-SA为相变材料,膨胀石墨(EG)为载体材料,用熔融共混法制备不同DA-LA-SA含量的三元低共熔脂肪酸/膨胀石墨复合相变材料(DA-LA-SA/EG-PCMs)。采用FT-IR、XRD、SEM、TGA和DSC对其组成成分、晶体结构、微观形貌、相变温度和相变焓进行表征。结果表明,当DA、LA和SA的质量配比为1∶8∶1时,DA-LA-SA具有较低的相变温度和较高的相变焓；EG由大量的微孔构成,通过微孔束缚和表面吸附与DA-LA-SA物理结合,具有良好的稳定性；EG质量分数为10%时,所制备的DA-LA-SA/EG-PCMs三元相变体系复合相变材料的相变温度为38.6 ℃,相变焓为123 J/g,导热系数为3.572 1 W·(m·K)-1,分散均匀,颗粒粒径较小,具有优良的热性能和稳定性。 |
| 英文摘要: |
| A ternary composite phase change material system (DA-LA-SA) was prepared by blending decanoic acid (DA), lauric acid (LA) and stearic acid (SA). Then a series of fatty acid eutectic mixture/expanded graphite composite phase change materials (DA-LA-SA/EG-PCMs) were prepared with DA-LA-SA as phase change component and expanded graphite (EG) as carrier component, by melt blending method. The composition, crystal structure, microstructure, phase transition temperature and enthalpy of DA-LA-SA/EG-PCMs were characterized by FT-IR, XRD, SEM, TGA and DSC. The results showed that when the mass ratio of DA/LA/SA was 1∶8∶1, DA-LA-SA had low phase transition temperature and high phase change enthalpy. EG was composed of numberous pores, and the DA-LA-SA/EG-PCMs with physical combination of EG and DA-LA-SA had good stability through the microporous bound and surface adsorption of EG. When the content of EG was 10wt%, the phase change temperature, enthalpy and thermal conductivity were 38.6 ℃, 123 J/g, and 3.572 1 W·(m·K)-1,respectively, accompanied with a uniform dispersion and small particle size, as well as excellent thermal performance and stability. |
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