geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Transport of liquids using superhydrophobic aerogels


, : Transport of liquids using superhydrophobic aerogels. Journal of Colloid and Interface Science 285(1): 413-418

The experimental results of the studies on the transportation of water droplets on a superhydrophobic silica aerogel-powder-coated surface are reported. The superhydrophobic silica aerogels were prepared using sol-gel processing of methyltrimethoxysilane (MTMS) precursor, methanol (MeOH) solvent, and base (NH4OH)-catalyzed water followed by supercritical drying using methanol solvent. The molar ratio of NH4OH/MTMS, H2O/MTMS, and MeOH/MTMS were varied from 1.7x10(-1) to 3.5x10(-1), 2 to 8, and 1.7 to 14, respectively, to find out the best-quality aerogels in terms of higher hydrophobicity and high droplet velocity. A specially built device was used for the measurement of velocity of water droplet of size 2.8 mm (+/-0.2 mm) on an inclined surface coated with superhydrophobic aerogel powder. Liquid marbles were prepared by rolling water droplets on aerogel powder and the marble(s) velocities on a noncoated inclined surface were compared with that of the water droplets. It was observed that the microstructure of the aerogel affects the droplet as well as marble velocities considerably. For an aerogel with uniform and smaller particles, the water droplet and marble velocities were observed to be maximum, i.e., 144 and 123 cm/s, respectively, whereas for the aerogels with bigger and nonuniform particles, the water droplet and marble velocities were observed to be minimum, i.e., 92 and 82 cm/s, respectively. The results have been discussed by taking into account the contact angles and microstructural observations.

US$19.90

PMID: 15797440

DOI: 10.1016/j.jcis.2004.11.033


Other references

Crammond, P.; Wilcox, M., 1992: Tannin adhesives from pine bark. Proceedings of the Washington State University International Particleboard Composite Materials Symposium: 6) 172-188

Audra, P.; Bretones, S.; Mellier, G., 1997: Term breech delivery: routine cesarean--versus--induced labor. Contraception, Fertilite, Sexualite 25(2): I-Iv

Tenenbaum, A.; Fisman, E.Z.; Shemesh, J.; Motro, M., 2012: The doubtful association between blood lipid changes and progression of coronary calcification. International Journal of Cardiology 153(2): 224-225

Salibe, A.A.; Moreira, S., 1963: Variola , probably a virus disease of Citrus 3rd International Congress of Citrus Virology, Campinas and Sao Paulo, Brazil, 1963 Abstract only. Fruits [Paris] 18(11): 534

Snyman, J.R.; Sommers, D.K., 1992: Levamisole augments roxatidine's immune modulatory effects in the graft-versus-host reaction (GVHR). Levamisole is known to have anti-anergic properties in immune compromised, but no or only marginal effects in immunologically competent subjects. In this study the possibility that levamisole would act as an 'immunoadjuvant' with roxatid...

Moche, J.A.; Cohen, J.C.; Pearlman, S.J., 2014: Axial computed tomography evaluation of the internal nasal valve correlates with clinical valve narrowing and patient complaint. The objective of this work was to explore the utility of axial computed tomography (CT) imaging to objectively define a narrow internal nasal valve, and compare those findings with clinical examination and patient complaint. Retrospective review f...

Evdokimov Y.M.; Skuridin S.G.; Badaev N.S., 1986: Evidence of the formation of 2 types of liquid crystalline microphases of low molecular weight rna molecules in polyethylene glycol water salt solutions. Doklady Akademii Nauk SSSR 286(4): 997-1000

Easton, N., 2010: Obama's stimulus killers. His two big legislative goals for the fall could put new burdens on a weak economy. Fortune 160(3): 19-19

Pilarska, K.; Eisner, M.; Koszarska, J.; Kurowski, M.; Tarnowska, H., 1974: Effect of Helvella esculenta and Amanita phalloides toxins in vitro on the content of reduced glutathione in erythrocytes of healthy subjects. Polski Tygodnik Lekarski 29(6): 217-219

Shirai N.; Ebihara M., 2005: Chemical characteristics of nakhlite, MIL 03346. Meteoritics and Planetary Science 40, Suppl