title: A simple sonochemical method for fabricating poly(methyl methacrylate)/stearic acid phase change energy storage nanocapsules.
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.
authors.affiliation: School of Chemistry & Chemical Engineering, Hefei University of Technology, Hefei 230009, China; School of Chemistry & Chemical Engineering, Beifang University of Nationalities, Yinchuan 750021, China.
authors.forename: Guxia
authors.initials: G
authors.lastname: Wang
authors.affiliation: School of Chemistry & Chemical Engineering, Hefei University of Technology, Hefei 230009, China. Electronic address: weibingxu@hfut.edu.cn.
authors.forename: Weibing
authors.initials: W
authors.lastname: Xu
authors.affiliation: School of Chemistry & Chemical Engineering, Beifang University of Nationalities, Yinchuan 750021, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Hou
authors.affiliation: School of Chemistry & Chemical Engineering, Beifang University of Nationalities, Yinchuan 750021, China. Electronic address: feidehai@163.com.
authors.forename: Shengwei
authors.initials: S
authors.lastname: Guo
keywords: In situ polymerization; Nanoencapsulation; Phase change energy storage; Sonochemistry