CELL 157 |
| Present knowledge concerning the molecular arrangement at the surface of cellulose fibrils is based largely on findings from molecular dynamics simulations and atomic force microscopy investigations. To obtain in depth information on surface structure of cellulose I fibrils we have employed CP/MAS 13C-NMR spectroscopy in combination with spectral fitting to analyze the C4 surface signals. A series of cellulose I substrates differing in order (degree of crystallinity) and fibril size including plant primary wall (2 nm) and Halocynthia (18 nm) celluloses were investigated. The results show a change from one broad signal associated with fibril surfaces to a more complex fine structure consisting of at least four signals as the order and fibril size increase. |
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Structure and Properties of Cellulosic Polymers, Assemblies, and Nanocomposites
1:00 PM-4:45 PM, Monday, April 7, 2008 Morial Convention Center -- Rm. R07, Oral
Division of Cellulose & Renewable Materials |