A simple sonochemical method for fabricating poly(methyl methacrylate)/stearic acid phase change energy storage
Guxia Wang1, Weibing Xu2, Qian Hou3
1School of Chemistry & Chemical Engineering, Hefei University of Technology, Hefei 230009, China; School of Chemistry & Chemical Engineering, Beifang University of Nationalities, Yinchuan 750021, China.
Abstract:
In this study, stearic acid suitable for thermal energy storage applications was nanoencapsulated in a poly(methyl methacrylate) shell. The nanocapsules were prepared using a simple ultrasonically initiated in situ polymerization method. The morphology and particle size of the poly(methyl methacrylate)/stearic acid phase change energy storage nanocapsules (PMS-PCESNs) were analyzed using transmission electron microscopy, scanning electron microscopy, atomic force microscopy and dynamic light scattering. The latent heat storage capacities of stearic acid and the PMS-PCESNs were determined using differential scanning calorimetry. The chemical composition of the nanocapsules was characterized using Fourier transform infrared spectroscopy. All of the results show that the PMS-PCESNs were synthesized successfully and that the latent heat storage capacity and encapsulation efficiency were 155.6 J/g and 83.0%, respectively, and the diameter of each nanocapsule was 80-90 nm.
