Micro- and nanostructured polymer foils prepared by thermal embossing techniqueWednesday (28.09.2016) 09:45 - 10:00 Part of:
Thermal embossing of polymers is a widely established technology. In this work, we present our new thermal embossing technique that enables to create micro- and nanostructured surfaces on polymer foils in one step. Laser structuring and anodization of aluminium were used to realize embossing tools with well- defined micro- and nanostructures We will present results about the influence of embossing parameters on nano- and microstructure of materials like high-density polyethylene (LD-PE) and polycarbonate (PC) . Surface structure was characterized by means of scanning electron microscopy and correlated with physical properties such as melting and softening behaviour of the polymers and resulting surface tension after embossment. It was found that embossing temperature, time and pressure, combined with varying pore size of nanostructured aluminium tools, have strong influence on the pin- and filament-like nanostructure of the resulting surface morphology. Depending on the realized micro- and nanostructure, industrial relevant surface properties like wettability or fogging can be modified. In addition, these polymer surfaces can act as a functional substrate for cell tissue engineering.