欢迎访问过程工程学报, 今天是

过程工程学报 ›› 2019, Vol. 19 ›› Issue (3): 617-622.DOI: 10.12034/j.issn.1009-606X.218282

• 材料工程 • 上一篇    下一篇

丙烯酸树脂-正十二烷醇相变微胶囊制备及性能表征

鲁进利1*, 李 洋2, 韩亚芳1, 钱付平1   

  1. 1. 安徽工业大学建筑工程学院,安徽 马鞍山 243032 2. 安徽工业大学能源与环境学院,安徽 马鞍山 243032
  • 收稿日期:2018-09-17 修回日期:2018-10-30 出版日期:2019-06-22 发布日期:2019-06-20
  • 通讯作者: 鲁进利
  • 基金资助:
    国家自然科学基金;安徽省自然科学基金

Preparation and properties characterization of microencapsulated phase change materials using acrylic resin copolymers/n-dodecanol

Jinli LU1*, Yang LI2, Yafang HAN1, Fuping QIAN1   

  1. 1. School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui 243032, China 2. School of Energy and Environment, Anhui University of Technology, Ma'anshan, Anhui 243032, China
  • Received:2018-09-17 Revised:2018-10-30 Online:2019-06-22 Published:2019-06-20
  • Contact: LU Jin-li

摘要: 微胶囊化相变材料具有储能密度高、相变温度近似恒定、便于储存和输运等特点,在热能储存、输运和利用领域具有广泛的应用前景。本工作采用悬浮聚合法辅以超声辐照手段合成了以正十二烷醇为芯材、丙烯酸树脂为壳材的新型高相变潜热相变微胶囊(MEPCM)颗粒。用扫描电子显微镜(SEM)、傅里叶红外光谱仪(FT-IR)、差式扫描量热仪(DSC)、热重分析仪(TGA)和激光粒度仪(LPSA)等设备对微胶囊性能进行了表征。结果表明,所制相变微胶囊呈较规则球体,粒径为638.14~1478.65 nm,中位径d50为933.91 nm。冷却过程中微胶囊芯呈两种不同的结晶过程,囊芯含量为43%,与设计值50%较接近,包覆率达86%,熔化相变潜热为93.31 kJ/kg;包覆后的相变材料融化温度为22.26℃,过冷度从4.61℃降至2.13℃。壳材不与芯材反应。MEPCM质量降低起始温度略高于纯正十二烷醇,封装可改善相变材料的热稳定性,该相变微胶囊具有良好的潜热储存能力和较快的温度变化响应速度。

关键词: 相变微胶囊, 纳米材料, 丙烯酸树脂, 正十二烷醇, 制备

Abstract: With the characteristics of high energy storage density, approximate constant temperature of phase change and convenient to storage or transport, the microencapsulated phase change materials (MEPCM) have wide application prospect in the fields of energy storage, transport and utilization. However, the traditional MEPCM particles use formaldehyde as the shell material, which would release harmful substances during application process. Therefore, it is necessary to develop a new type of formaldehyde-free MEPCM. A novel MEPCM particles with n-dodecanol as core material and acrylic resin copolymers as shell material using suspension polymerization under ultrasound irradiation condition were prepared in this work. The scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), thermo-gravimetric analyzer (TGA) and laser particle size analyzer (LPSA) were employed to characterize the performance of MEPCM particles. The results indicated that the MCPM particles were almost regular and had a uniform particle size. The particle sizes of MEPCM were 638.14~1478.65 nm, and the median diameter d50 was 933.91 nm which reaches nanometer scale. Two types of crystals were formed in core materials of all MEPCM particle during crystallization. The melting latent heat and the encapsulation efficiency of MEPCM reached to the maximum value of 93.31 kJ/kg and 86%, respectively. The melting temperature of MEPCM was 22.26℃, and the degree of supercooling reduced from 4.61℃ to 2.13℃. The proportion of core was 43%, it was closed to the design value of 50%. The shell material did not react with the core material. The mass reduce starting temperature of MEPCM was slightly higher than that of pure n-dodecanol, indicating that the thermal stability of the phase change material can be improved after encapsulation. In summary, the MEPCM had a good potential for energy storage and high response speed when face to temperature fluctuation.

Key words: microencapsulated phase-change materials, nanomaterials, acrylic resin copolymers, n-dodecanol, preparation