Drying of sessile droplets of laponite-based aqueous nanofluids
作者： NI Lebovka , VA Gigiberiya , OS Lytvyn , Yu Yu Tarasevich , IV Vodolazskaya
DOI: 10.1016/J.COLSURFA.2014.08.014
关键词: Evaporation 、 Nanotechnology 、 Coffee ring effect 、 Aqueous solution 、 Conservation of mass 、 Chemical engineering 、 Colloid 、 Phase (matter) 、 Nanofluid 、 Chemistry 、 Pattern formation
摘要: Abstract Formation of the ring-like pattern by nano-particles desiccated droplet a laponite-based aqueous nanofluid (the well known ‘coffee-ring effect’) is studied. The temperature was controlled and fixed (T = 300 K). laponite concentration varied in order to investigate its effect on formation. It observed that coffee-ring vanishes if exceeds 5%. A simple model for analysis colloidal sessile desiccation proposed. describes correctly dynamics drying profile final shape dried film (deposit). based mass conservation law reasonable assumption deposit (gel phase) prevents flows.
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