Abstract
![CDATA[The exfoliated structures of lamellar clays offer potentials as precursor for formation of nano-structured materials. We explored the Synchrotron Radiation soft X-ray techniques and nuclear magnetic resonance to study the exfoliation of phyllosilicate clays by polymers. Experiments were carried out in dispersions containing approximately 1% weight phyllosilicate in 5% aqueous solution of poly(acrylic acid) at different temperatures. The clays were exfoliated as the reaction was performed at 85��C. X-ray photoemission spectroscopy indicated that the exfoliated structures were consisted of virtually pure silica nano-plates. 29Si nuclear magnetic resonance and oxygen K-edge near edge X-ray absorption fine structure indicated that the surface of the plates was terminated by high concentrations of the silanol groups, which created structural branches. The formation of the branches created a steric effect that inhibited the stacking of the plates, which eventually resulted in the exfoliation.]]
Original language | English |
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Title of host publication | Synchrotron Radiation Instrumentation: Ninth International Conference on Synchrotron Radiation Instrumentation, Daegu, Korea, 28 May-2 June 2006 : SRI 2006 |
Publisher | American Institute of Physics |
Number of pages | 4 |
ISBN (Print) | 9780735403734 |
Publication status | Published - 2007 |
Event | International Conference on Synchrotron Radiation Instrumentation - Duration: 1 Jan 2007 → … |
Conference
Conference | International Conference on Synchrotron Radiation Instrumentation |
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Period | 1/01/07 → … |
Keywords
- clay
- phyllosilicates
- exfoliation
- nuclear magnetic resonance
- synchrotron radiation
- polymers