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    Novel wetting model for microtextured polymeric surfaces to identify defects in micro-injection molded parts

    Year: 2018

    Journal: J. Micromech. Microeng., Volume 28, AUG

    Authors: Barshutina, Marie; Rodgers, John; Coulter, John

    Organizations: NSF [1014987]

    Keywords: microinjection molding; quality control; water contact angle; interfacial wetting; microscale mechanics

    This paper is devoted to developing a wettability model for microfeatured surfaces that align with empirical evidence. Parts containing microtopography were manufactured through the use of microinjection molding, and the water contact angle of molded substrates was compared to values obtained from existing theoretical models. To account for discrepancies between existing models and experimental results, a novel theoretical model has been proposed to better describe the phenomena occurring in between microfeatures. A new technique based on this theoretical model was proposed, and its algorithm is described, identifying a variety of potential molding defects that could be detected through its use.
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