Nanocomposite fibres are becoming of great importance since organic–inorganic nanoscale composites frequently exhibit unexpected hybrid properties synergistically derived from the two components. The incorporation of one-, two- and three-dimensional nano particles, e.g. layered clays, nano-tubes, nano-fibres, metal containing nano-particles, carbon black, etc. is used to prepare nanocomposite fibres. However, the preparation of nanocomposite fibres offers several possibilities, i.e. creation of nanocomposite fibres by dispersing of nanoparticles into polymer solutions, the polymer melt blending of nanoparticles, in situ prepared nanoparticles within a fibre, the intercalative polymerization of the monomer, introduction of nanoparticles from dispersion into a porous polymer, preparation of nanocoatings by different techniques, e.g. sol-gel process, etc. With the respect to nanoparticles organization in / on fibres, respectively nanocoated fibres and fibres with nanoinclusions can be divided. Nanocomposite fibres demonstrate improved applicable properties, e.g. mechanical, flammability, electromagnetic, electro-conductive, sorption properties, and/ or obtain additional functional properties, like antimicrobial, self-cleaning, shielding, UV protective properties, etc. Combining polymer fibre and nanopaticles of different structures and characteristics influences also fibre’s surface properties, i.e. morphological properties and electrokinetic behaviour. In order to analyse fibre’s surface charge, the zeta potential is often determined through streaming potential measurements as a function of pH. These properties are generated by the electrochemical double layer (EDL), which exists at the phase boundary between a solid and a solution containing ionic moieties. By variation of the solution’s pH value and electrolyte content it is possible to estimate the acidic / basic and polar / nonpolar character of the solid surface from zeta potential data. Some examples of nanocomposite fibres (e.g. nanofilled PP fibres, SiO2 – nanocoated different types of fibres) regarding their electrokinetic properties are presented in the contribution. In addition to, the influence of nanocomposite fibres preparation procedure conditions on their zeta potential values is demonstrated.
B.06 Other
COBISS.SI-ID: 14932758Recently great attention has been focused to the utilization of agricultural byproducts as sources for natural cellulose fibres and therefore different renewable resources of plant origin have been studied. In the paper fibres from quinoa are characterized. Quinoa is a promising reinforcement for use in composites on account of its low cost, low density, high specific strength and modulus, no health risk, easy availability in some countries and renewability.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 14943510