Drying of sessile droplets of laponite-based aqueous nanofluids

Lebovka, N.I. and Gigiberiya, V.A. and Литвин, Оксана Степанівна and Tarasevich, Yu.Yu. and Vodolazskaya, I.V. and Bondarenko, O.P. (2014) Drying of sessile droplets of laponite-based aqueous nanofluids Colloids and Surfaces A: Physicochemical and Engineering Aspects, 462. pp. 52-63. ISSN 0927-7757

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Formation of the ring-like pattern by nano-particles of the desiccated droplet of a laponite-based aqueousnanofluid (the well known ‘coffee-ring effect’) is studied. The temperature was controlled and fixed(T = 300 K). The laponite concentration was controlled and varied in order to investigate its effect onthe pattern formation. It was observed that the coffee-ring effect vanishes if concentration of laponiteexceeds 5%. A simple model for analysis of colloidal sessile droplet desiccation is proposed. The modeldescribes correctly dynamics of the drying droplet profile and the final shape of the dried film (deposit).The model is based on the mass conservation law and reasonable assumption that deposit (gel phase)prevents the flows.

Item Type: Article
Additional Information: 10.1016/j.colsurfa.2014.08.014
Uncontrolled Keywords: Laponite; Nanofluid; Sessile droplet; Evaporation; Coffee-ring effect; Desiccation; Modeling; Mass conservation
Subjects: Це архівна тематика Київського університету імені Бориса Грінченка > Статті у журналах > Наукові (входять до інших наукометричних баз, крім перерахованих, мають ISSN, DOI, індекс цитування)
Divisions: Це архівні підрозділи Київського університету імені Бориса Грінченка > Кафедра інформатики
Depositing User: Оксана Степанівна Литвин
Date Deposited: 02 Mar 2015 14:01
Last Modified: 12 Apr 2018 13:57
URI: https://elibrary.kubg.edu.ua/id/eprint/6870

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