Abstract
Large-area texturing has been achieved by creating micro-holes and micro-grooves on polystyrene using a carbon-fiber (C-fiber) mould. The single-step approach of a hot-embossed replica of vertically aligned carbon fiber (VACF), and horizontally aligned carbon fiber (HACF) were analyzed. The variation in shape and size of imprinted holes/grooves were analyzed using processing parameters such as temperature, holding time, and embossing load. Wettability control and anti-reflectivity of hot-embossed polystyrene sheets were investigated. Textured polystyrene sheet enhances water droplet contact angle from 62° to 89°, whereas the average reflectivity reduced to 6% from 24%. The texture of micro-holes exhibits less light reflection than that of micro-grooves.
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