Title: Transformation of Polymer Nanofibers to Nanospheres Driven by the Rayleigh Instability
Authors: Huang, Yu-Chieh
Fan, Ping-Wen
Lee, Chih-Wei
Chu, Chien-Wei
Tsai, Chia-Chan
Chen, Jiun-Tai
Department of Applied Chemistry
Keywords: annealing;nanofibers;nanospheres;PMMA;templates
Issue Date: 24-Apr-2013
Abstract: We study the thermal annealing effect of poly(methyl methacrylate) (PMMA) nanofibers made from anodic aluminum oxide (AAO) templates and their transformation to PMMA nanospheres. The PMMA nanofibers are prepared by wetting an AAO template with a 30 wt % PMMA solution, followed by the evaporation of the solvent, After the AAO template is removed by a weak base, the PMMA nanofibers are thermally annealed in ethylene glycol, a nonsolvent for PMMA. The surfaces of the nanofibers undulate and transform into nanospheres, driven by the Rayleigh instability. The driving force for the transformation process is the minimization of the interfacial energy between PMMA nanofibers and ethylene glycol. The transformation times at higher annealing temperatures are shorter than those at lower annealing temperatures. This study provides a facile route to prepare polymer nanospheres which are not accessible by other traditional methods.
URI: http://dx.doi.org/10.1021/am400029j
ISSN: 1944-8244
DOI: 10.1021/am400029j
Volume: 5
Issue: 8
Begin Page: 3134
End Page: 3142
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