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In the present work the morphology of natural fibers was correlated with their mechanical properties via image analysis. Jute, sisal, curaua, coir and piassava fibers were tested under direct tension in a universal testing machine and the cross-sectional areas of the fibers were calculated using images obtained in a scanning electron microscopy. For the jute fiber the tests were performed for several...
We present the Ni-P and Co-P nanoparticles prepared by electroless plating for catalytic synthesis of carbon micro- and nanocoils (CMCs, CNCs) by means of the conventional CVD method. SEM analysis reveals that the carbon coils have unique DNA-like helical morphologies. Moreover, microcoils with flat cross-section can be stretched to 3 times of their original coil length. The measurements of I-V curve...
Polyimide/silica-alumina (PI/SiO2-Al2O3) hybrid films were prepared via sol-gel process with tetraethoxysilane (TEOS) and aluminum isopropylate (AIP) as inorganic precursors. The presence of SiO2 and Al2O3 inorganic phases and its weight ratio showed a remarkable effect on the microstructure and properties of the polyimide based hybrid films. The chemical structure of hybrid films was analyzed by...
The purpose of this study was to prepare a 3D nanocomposite bone substitute prepared from gelatin (GEL) and synthesized hydroxyapatite (HAP) in order to mimic natural bone feathers through a novel layer solvent casting combined freeze-drying technique. The adhesion between superimposed layers was ensured by applying a GEL solution. Furthermore, samples were cross-linked with 1% glutaraldehyde (GA)...
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