- Bastidas, Juan C. and Venditti, Richard and Pawlak, Joel and Gilbert, Richard and Zauscher, Stefan and Kadla, John F., Chemical force microscopy of cellulosic fibers,
Carbohydrate Polymers, vol. 62 no. 4
pp. 369 - 378  .
(last updated on 2007/04/06)
Atomic force microscopy with chemically modified cantilever tips (chemical force microscopy) was used to study the pull-off forces (adhesion forces) on cellulose model surfaces and bleached softwood kraft pulp fibers in aqueous media. It was found that for the -COOH terminated tips, the adhesion forces are dependent on pH, whereas for the -CH3 and -OH terminated tips adhesion is not strongly affected by pH. Comparison between the cellulose model surfaces and cellulosic fibers under our experimental conditions reveal that surface roughness does not affect adhesion strongly. X-ray photoelectron spectroscopy (XPS) and Fourier Transformed Infrared (FTIR) spectroscopy reveal that both substrate surfaces have homogeneous chemical composition. The results show that chemical force microscopy can be used for the chemical characterization of cellulose surfaces at a nano-level. © 2005 Elsevier Ltd. All rights reserved.
Cellulose;Bleached pulp;Kraft pulp;pH effects;Surface roughness;X ray photoelectron spectroscopy;Fourier transform infrared spectroscopy;Atomic force microscopy;