Department of Polymer and Surface Engineering, Institute of Chemical Technology, Mumbai, India.
Covestro India Pvt. Ltd., Mumbai, India.
J Microencapsul. 2023 Mar;40(2):98-105. doi: 10.1080/02652048.2023.2175923. Epub 2023 Feb 14.
This study aims to enhance the latent heat storage properties of the microcapsules by altering the amount of crosslinking agent from 3 to 20%, the core-to-shell ratio from 1:1 to 2:1, and the amount of initiator from 1 to 3%. The phase change material n-tetradecane (C-14) was microencapsulated by using poly (methyl methacrylate -co- methacrylic acid) as a shell material through an oil by water-seeded emulsion polymerisation technique. The structural, morphological, and thermal properties of microcapsules were evaluated by using Fourier transform infrared spectroscopy, optical microscopy, scanning electron microscopy, differential scanning calorimetry analysis, and thermogravimetric analysis. The average particle size of the microcapsules ranges from 01 to 15 µm. The results showed that the microcapsules have a higher melting enthalpy value of 127.3 ± 0.06 J/g with a microencapsulation efficiency of 66.72% when a 20% crosslinker was used. The thermal stability of the phase change material (PCM) was increased by ∼30 ± 2 °C by encapsulation.
本研究旨在通过改变交联剂用量（从 3%到 20%）、核壳比（从 1:1 到 2:1）和引发剂用量（从 1%到 3%）来提高微胶囊的潜热储能性能。相变材料正十四烷（C-14）通过油包水种子乳液聚合技术，以聚（甲基丙烯酸甲酯-共-甲基丙烯酸）为壳材料进行微封装。采用傅里叶变换红外光谱、光学显微镜、扫描电子显微镜、差示扫描量热分析和热重分析对微胶囊的结构、形态和热性能进行了评价。微胶囊的平均粒径范围为 01 到 15 μm。结果表明，当使用 20%的交联剂时，微胶囊具有较高的熔融焓值 127.3±0.06 J/g，微胶囊化效率为 66.72%。通过封装，相变材料（PCM）的热稳定性提高了约 30±2℃。
