García-Viñuales Sara, Rubio César, Martínez-Izquierdo Lidia, Zornoza Beatriz, Piera Elena, Caballero Miguel Ángel, Téllez Carlos
Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain.
Chemical and Environmental Engineering Department, Universidad de Zaragoza, 50018 Zaragoza, Spain.
Membranes (Basel). 2022 Feb 25;12(3):266. doi: 10.3390/membranes12030266.
n-Eicosane-melamine formaldehyde microcapsules of an average size of 1.1 μm and latent heat of fusion of 146.2 ± 5.3 J/g have been prepared. They have been characterized by scanning electron microscopy, FTIR spectroscopy, calorimetric techniques, and thermogravimetric analyses. Under processing conditions, the microcapsules apparently preserved their properties, also maintaining their n-eicosane loading and heat storage capacity under washing conditions (water with detergent at 60 °C). The microcapsules synthesis has been scaled up for the fabrication of functional films by extrusion. For that, polymer films containing 10 wt.% of microcapsules were prepared at a pilot plant level. In those films, even though a fraction of the n-eicosane loading was lost during the extrusion process, the microcapsules showed good compatibility within the polyamide. The percentage of PCM in the polyamide 6 films was estimated by TGA, verifying also the heat storage capacity predicted by DSC (2.6 ± 0.7 J/g).
已制备出平均尺寸为1.1μm、熔化潜热为146.2±5.3J/g的正二十烷-三聚氰胺甲醛微胶囊。通过扫描电子显微镜、傅里叶变换红外光谱、量热技术和热重分析对其进行了表征。在加工条件下，微胶囊显然保留了其性能，在洗涤条件下（60℃含洗涤剂的水）也保持了其正二十烷负载量和储热能力。微胶囊的合成已扩大规模，用于通过挤出制造功能膜。为此，在中试工厂水平制备了含有10wt.%微胶囊的聚合物膜。在这些膜中，尽管在挤出过程中损失了一部分正二十烷负载量，但微胶囊在聚酰胺中显示出良好的相容性。通过热重分析估计了聚酰胺6膜中相变材料的百分比，也验证了差示扫描量热法预测的储热能力（2.6±0.7J/g）。
