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Bacterial cellulose (BC) nanofibres were modified only on their surface using an esterification reaction with acetic acid, hexanoic acid or dodecanoic acid. This reaction rendered the extremely hydrophilic surfaces of BC nanofibres hydrophobic. The hydrophobicity of BC increased with increasing carbon chain length of the organic acids used for the esterification reaction. Streaming (zeta-) potential...
The wetting and moisture up-take behaviour, as well as the electrokinetic properties of various lignocellulosic fibres were characterised. Knowledge of surface and water uptake properties of this kind of materials will help to tailor their potential use in different end user applications. The surface tension of the fibres was determined from wetting measurements using the capillary rise technique...
In order to improve the surface properties of carbon fiber without affecting the mechanical properties of the reinforcing fibers, various monomers (pyrrole (Py), carbazole (Cz) and thiophene (Th)) were used to electrograft conjugated copolymers. The electrocoated carbon fibers were characterized with respect to their surface morphology and surface composition, using scanning electron microscopy (SEM)...
The zeta-potentials (ζ-potentials) of a polyethersulfone nanofiltration (NF) membrane (PES 10, Celgard GmbH) were determined in single salt solutions (Na 2 SO 4 and KCl-electrolytes) at different concentrations and pH values and results were compared with measured rejections rates of the electrolytes in the same aqueous medium. With increasing Na 2 SO 4 concentration...
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