An estimation of the Young's modulus of bacterial cellulose filaments

摘要: An estimation, using a Raman spectroscopic technique, of the Young’s modulus single filament bacterial cellulose is presented. This technique used to determine local molecular deformation via shift in central position 1095 cm–1 band, which corresponds stretching glycosidic bond backbone structure. By calculating rate with respect applied strain it shown that stiffness fibril can be estimated. In order perform this networks fibres are rotated through 360° and intensity cm−1 band recorded. It largely independent angle rotation, suggests randomly distributed. The predicted from calibration against modulus, previously published data, by Krenchel analysis back-calculate fibril. value obtained (114 GPa) higher than reported values for parameter, but lower estimates crystal cellulose-I (130–145 GPa). Reasons these discrepancies given terms crystallinity structural composition samples.