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Roll-to-Roll Hot Embossing of High Aspect Ratio Micro Pillars for Superhydrophobic Applications. INT POLYM PROC 2019. [DOI: 10.3139/217.3815] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
AbstractMany surfaces in nature such as the lotus leaf, cicada wings, water spider legs and gecko feet have attracted attention due to their inherent superhydrophobicity and self-cleaning properties. These surfaces are characterized by water contact angles greater than 150° and contact angle hysteresis < 10°. In this work, a continuous fabrication methodology for production of such superhydrophobic surfaces consisting of well-ordered micro-pillar structures (aspect ratio greater than 1 (1.3)) on a large area polyamide film using roll-to-roll hot embossing process was demonstrated. It was found that the temperature played a significant role in replication. Incomplete replication was observed in regime 1 (150 to 155 °C) and the height of replication was influenced by nip pressure and roll speed due to viscosity variations. In contrast, complete replication was seen in regime 2 (190 to 195 °C) and the height of replication was insensitive to nip pressure and roll speed due to a fairly constant viscosity value. The embossed polyamide surface, once coated with a low surface energy 1H, 1H, 2H, 2H-perfluorooctyltrichlorosilane (PFTS) monolayer, showed super-repellant characteristics with respect to water and demonstrated a successful manufacturing approach to fabricate superhydrophobic surfaces.
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Evaluation of a nursing swallowing estimation as a toll for identification of swallowing disorders on admission to rehabilitation following acquired brain injury. Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Durable bonding of silica nanoparticles to polymers by photoradiation for control of surface properties. POLYM ADVAN TECHNOL 2014. [DOI: 10.1002/pat.3276] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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