Mo Songping, Li Yuanhong, Shan Shaofei, Jia Lisi, Chen Ying
Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
Materials (Basel). 2021 Sep 22;14(19):5481. doi: 10.3390/ma14195481.
Sugar alcohols are phase-change materials with various advantages but may suffer from leakage during applications. In this study, inositol nanocapsules were synthesized at various conditions, including the amount of precursors and the time for adding the precursors. The effects of synthesis conditions on the properties of the nanocapsules were studied. The morphology, chemical composition, microstructure, phase-change characteristics and size distribution of the nanocapsules were investigated by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscope (TEM), differential scanning calorimeter (DSC) and a zeta potential analyzer. The results confirm that inositol was well-encapsulated by an SiO shell. The shell thickness increased, while the supercooling degree of the nanocapsules decreased with increasing time for adding the precursors. In order to obtain nanocapsules with good morphology and phase-change characteristics, the time for adding the precursors should increase with the amount of precursors. The nanocapsules with the best properties exhibited high melting enthalpy, encapsulation ratio and energy storage efficiency of 216.0 kJ/kg, 83.1% and 82.1%, respectively. The size of the nanocapsules was remarkably affected by the triethoxysilane (TES) amount.
糖醇是具有多种优点的相变材料，但在应用过程中可能会出现泄漏问题。在本研究中，在包括前驱体用量和添加前驱体时间等各种条件下合成了肌醇纳米胶囊。研究了合成条件对纳米胶囊性能的影响。通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FT-IR）、透射电子显微镜（TEM）、差示扫描量热仪（DSC）和zeta电位分析仪对纳米胶囊的形态、化学成分、微观结构、相变特性和尺寸分布进行了研究。结果证实肌醇被SiO壳层良好地包裹。随着添加前驱体时间的增加，壳层厚度增加，而纳米胶囊的过冷度降低。为了获得具有良好形态和相变特性的纳米胶囊，添加前驱体的时间应随前驱体用量的增加而增加。性能最佳的纳米胶囊表现出高的熔化焓、包封率和储能效率，分别为216.0 kJ/kg、83.1%和82.1%。纳米胶囊的尺寸受三乙氧基硅烷（TES）用量的显著影响。
