KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Environmental Science and Engineering Program
Interfacial Lab (iLab), Water Desalination and Reuse Center (WDRC), Division of Biological and Environmental Sciences (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
KAUST Catalysis Center (KCC)
Physical Science and Engineering (PSE) Division
Water Desalination and Reuse Research Center (WDRC)
KAUST Grant NumberBAS/1/1070-01-01
Permanent link to this recordhttp://hdl.handle.net/10754/667486
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AbstractLiquid marbles refer to liquid droplets that are covered with a layer of non-wetting particles. They are observed in nature and have practical significance. However, a generalized framework for analyzing liquid marbles as they inflate or deflate is unavailable. The present study fills this gap by developing an analytical framework based on liquid-particle and particle-particle interactions. We demonstrate that the potential final states of evaporating liquid marbles are characterized by one of the following: (I) constant surface area, (II) particle ejection, or (III) multilayering. Based on these insights, a single-parameter evaporation model for liquid marbles is developed. Model predictions are in excellent agreement with experimental evaporation data for water liquid marbles of particle sizes ranging from 7 nanometers to 300 micrometers (over four orders of magnitude) and chemical compositions ranging from hydrophilic to superhydrophobic. These findings lay the groundwork for the rational design of liquid marble applications.
SponsorsAGJ thanks Ms. Jamilya Nauruzbayeva and Mr. Sankara Arunachalam from KAUST for their assistance with the scanning electron microscopy, Ms. Nayara Musskopf (KAUST) for her assistance with the literature review, and Mr. Thiago Reihner and Dr. Meng Shi for the fruitful discussions
HM acknowledges KAUST for funding (BAS/1/1070-01-01).