Effect of nonionic compound emulsifiers Tween80 and Span80 on the properties of microencapsulated phase change materials. (11th October 2013)

• Record Type: Journal Article
• Authors: Zhan, Shiping; Zhou, Zhiyi; Wang, Weijing; Zhao, Qicheng; Hou, Weimin
• Is Part Of: Journal of microencapsulation. Volume 31:Number 4(2014:Jun.)
• Page Start: 317
• Page End: 322
• Publication Date: 2013-10-11
• Subjects: In situ polymerization -- microPCMs -- nonionic emulsifier -- phase change material; Microencapsulation -- Periodicals; Controlled release technology -- Periodicals; 615.19
• DOI: 10.3109/02652048.2013.843728
• Languages: English
• ISSNs: 0265-2048

Abstract

Abstract: In this article, the nonionic compound emulsifiers Tween80 and Span80 were used to prepare microcapsules containing phase change materials (microPCMs) with melamine-formaldehyde (MF) shells by in situ polymerization method. The effects of compound emulsifiers Tween80 and Span80 on the structure, morphologies and properties of microPCMs containing paraffin were studied. SEM morphological investigation suggests that a complex of Tween80 and Span80 as emulsifiers are optimal for the fabrication of microPCMs in this study compared to Tween60 or OP-10. The diameter distributions of microPCMs synthesized with different amounts of compound emulsifiers are uniform, whereas compound emulsifiers' amount affect the mean diameter of microPCMs decreasing from 5.34 to 3.05 µm. These microPCMs with the core/shell weight ratio 3/1 have smoother surface and a higher core content of 68.7% than other core/shell ratio. Anti-osmosis measurements indicate that microPCMs have good compactness and stable performance compared to those synthesized by one type of emulsifier.