Two‐dimensional electrolyte nature of exfoliated montmorillonite nanoplatelets fabricated by soap‐free emulsion polymerization and their affinity for cations |
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| Authors: | Chia‐Hsin Lee Ting Hsiang Weng Ken Yen Liu Keng Jen Lin King‐Fu Lin |
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| Affiliation: | 1. Department of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan, Republic of China;2. Institute of Polymer Science and Engineering, National Taiwan University, Taipei Taiwan, Republic of China |
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| Abstract: | Montmorillonite (MMT) nanoplatelets, fabricated by the exfoliation of MMT during participating in the soap‐free emulsion polymerization of methyl methacrylate, were well‐dispersed in water and performed like a two‐dimensional electrolyte. Their ionic conductivity roughly follows the Manning's limiting law for the conduction of a polyelectrolyte. The dissociated MMT nanoplatelets that carry negative charges in water were able to rapidly adsorb cations, such as tris(2,2′‐bipyridyl)ruthenium(II) (Ru(bpy) ) and methylene blue (MB+), and recover into a smectic configuration floating as a separating phase. By using the Langmuir equation, we were able to estimate the occupied surface areas of MMT nanoplatelets by each Ru(bpy) and MB+ cations as 4.708 and 1.806 nm2/ion, respectively. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 |
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| Keywords: | montmorillonite clay electrolytes cations encapsulation |
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