Research Information System
Turkish Surface Science Society Workshop, Ankara, Turkey, 1 - 04 May 2011, pp.18
A “Liquid Marble” forms when a micro/nano sized hydrophobic powder was coated on a hydrophilic liquid drop.1 Quéré and co-workers were the first to obtain liquid marbles by coating water and glycerol droplets with micron-sized hydrophobized lycopodium (spores of moss plant) powders.1,2 The synthesis and application of liquid marbles is a new research field and was developed in the last decades parallel to the development of nano/micro technology by various groups. However, some of the properties of the liquid marbles have been still unclear such as their effective surface tension (?eff) despite their wide range application areas. Only some publications have discussed the ?eff values of the liquid marbles. Three different method were used to calculated the ?eff of water liquid marble: i-analysis the marble shape, ii-vibration of marble5 and iii- the maximum height method which is the simplest one. In a parallel study, we investigated the liquid marble properties such as buckling time and floating on water properties of perfluoroacrylate homopolymer which was synthesized in homogenous supercritical CO2 medium where the polymer particle size was about 8 ?m characterized with using Malvern Mastersizer 2000 analyzer. In this work, we examined the methods to determine the effective surface tension of liquid marbles made of 8 ?m perfluoroacrylate particles and we determined that ?eff value of the water and formamide liquid marbles as 66±5 and 52±2 mN/m, respectively by using the maximum height method. We also introduced a new perspective on the effective surface tension calculation for liquid marbles and to discuss some wrong comments in the literature.