化工进展 ›› 2025, Vol. 44 ›› Issue (1): 388-397.DOI: 10.16085/j.issn.1000-6613.2023-2266

• 材料科学与技术 • 上一篇    下一篇

月桂酸-石蜡二元共晶和纳米SiO2气凝胶新型建筑储能材料的研制和性能表征

闻静(), 张红婴(), 张屹东, 许润泽   

  1. 江西理工大学土木与测绘工程学院,江西 赣州 341000
  • 收稿日期:2023-12-25 修回日期:2024-02-07 出版日期:2025-01-15 发布日期:2025-02-13
  • 通讯作者: 张红婴
  • 作者简介:闻静(1998—),女,硕士研究生,研究方向为建筑节能技术。E-mail:1002768975@qq.com
  • 基金资助:
    国家自然科学基金(51966004);江西省自然科学基金(20212BAB204029);江西理工大学清江青年优秀人才项目(JXUSTQJYX2017003)

Development and performance characterization of architectural energy storage materials with lauric acid-paraffin binary eutectic and nanosized SiO2 aerogel

WEN Jing(), ZHANG Hongying(), ZHANG Yingdong, XU Runze   

  1. School of Civil Engineering and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
  • Received:2023-12-25 Revised:2024-02-07 Online:2025-01-15 Published:2025-02-13
  • Contact: ZHANG Hongying

摘要:

以月桂酸(LA)和石蜡(PS)为原料制备了月桂酸-石蜡(LA-PS)二元共晶混合物,通过真空吸附法将二元共晶混合物吸附到纳米SiO2气凝胶中形成复合相变材料月桂酸-石蜡/纳米SiO2气凝胶。泄漏实验表明,纳米SiO2气凝胶对LA-PS的最大吸附率为70%;傅里叶红外光谱的结果显示,LA-PS/纳米SiO2气凝胶具有优异的化学相容性;DSC测试结果显示,LA-PS/纳米SiO2气凝胶的相变温度为35.19℃,相变潜热为115.89J/g。此外,LA-PS/纳米SiO2气凝胶的储能效率为98.99%,说明LA-PS/纳米SiO2气凝胶具有良好的蓄热性能。因此,制备的复合相变材料在玻璃窗透明围护结构利用方面,具有合适的相变温度、较高的相变潜热和较好的热稳定性和耐久性,从而具有较好的应用前景。

关键词: 复合相变材料, 脂肪酸, 石蜡, 纳米二氧化硅气凝胶, 建筑节能

Abstract:

In this paper, a binary eutectic mixture of lauric acid-paraffin (LA-PS) was prepared from lauric acid (LA) and paraffin (PS), and the binary eutectic mixture was adsorbed into nano-SiO2 aerogel by vacuum adsorption method to form a composite phase change material lauric acid-paraffin/nano-SiO2 aerogel. Leakage experiments showed that the maximum adsorption rate of the nano-SiO2 aerogel to LA-PS was 70%. The results of Fourier infrared spectroscopy that the LA-PS/nano-SiO2 aerogel had excellent chemical compatibility. The results of the DSC test showed that the phase transition temperature of the LA-PS/nano-SiO2 aerogel was 35.19℃ and the latent heat of the phase transition was 115.89J/g. In addition, the LA-PS/nanosized SiO2 aerogel had an energy storage efficiency of 98.99%, indicating that LA-PS/nanosized SiO2 aerogel had good thermal storage properties. Therefore, the prepared composite phase change materials had suitable phase change temperature, high latent heat of phase change and good thermal stability and durability for the utilization of transparent enclosure for glass windows, and thus having a good application prospect.

Key words: composite phase change materials, fatty acids, paraffin, nanosized SiO2 aerogel, building energy efficiency

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