Nanocoatings mechanical properties

Nanomechanics, a branch of nanoscience, focuses on the fundamental mechanical properties of physical systems at the nanometer scale. It has emerged on the crossroads of classical mechanics, solid-state physics, statistical mechanics, materials science, and quantum chemistry. Moreover, it provides a scientific foimdation for nanotechnology. Often, it is looked upon as a branch of nanotechnology, that is, an applied area with a focus on the mechanical properties of engineered nanostructures and nanosystems that include nanoparticles, nanopowders, nanowires, nanorods, nanoribbons, nanotubes, including carbon nanotubes (CNTs) and boron nitride nanotubes (BNNTs), nanoshells, nanomembranes, nanocoatings, nanocomposites, and so on. 

Polypropylene (PP) is, besides polyesters, one of the most widely used polymers for producing synthetic fibres, especially for technical applications. PP fibres are mostly used in different technical fields due to their excellent mechanical properties, high chemical stability and processability. However, because of low surface energy, lack of reactive sites and sensitivity to photo- or thermal oxidation the polymer properties are insufficient for some applications. Therefore, several techniques for fibre modification have been reported, e.g. plasma treatment, chemical modification and nanomodification, i.e. production of nanocoated and nanofilled materials. 

Second, calcium phosphate nanocoatings possess better biocompatibility and osteoconductive properties than micron-sized coatings. Almost all kinds of calcium phosphates studies by far have exhibited such improvement, including HA, TCP, dicalcium phosphate dehydrate (DCPD or brushite, CaHP0 -2H20), and so on [82,83]. The mechanism(s) behind the significantly enhanced biocompatibility and... 

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