Characterization of surface free energies of talc powders using the thin layer wicking technique

Emilio Lobato, Jinhong Zhang, Ismail Yildirim, Roe Hoan Yoon, Jorge Yordan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Thin layer wicking technique was used to determine the contact angles (Θ) of different liquids on powdered talc samples. The measured contact angles were used to calculate the surface free energies (γ S) of talc and its components, which included dispersion (γ S AB), acidic (γ S d), basic (γ S +), and acid-base (γ S AB) surface free energies, using the van Oss-Chaudhury-Good (OCG) equation. The surface free energy characterization was conducted on both the basal and edge surfaces. The results showed that talc is a low surface energy solid, and that its basal surfaces are basic, while its edge surfaces are acidic. It has also been found that the hydrophobicity of talc increases with decreasing particle size, indicating that fracture occurs preferentially along the basal surface of talc. As the particle size is reduced beyond a certain limit, however, talc becomes increasingly hydrophilic, indicating that talc begins to fracture along the edge surfaces, thereby exposing more hydrophilic surfaces.

Original languageEnglish (US)
Title of host publication2006 SME Annual Conference - Functional Fillers and Nanoscale Minerals: New Markets/New Horizons
Pages101-114
Number of pages14
Volume2006
StatePublished - 2006
Externally publishedYes
Event2006 SME Annual Conference - S. Louis, MO, United States
Duration: Mar 26 2006Mar 29 2006

Other

Other2006 SME Annual Conference
CountryUnited States
CityS. Louis, MO
Period3/26/063/29/06

Fingerprint

Talc
Free energy
Powders
Contact angle
Particle size
Acids
Hydrophobicity
Interfacial energy

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Lobato, E., Zhang, J., Yildirim, I., Yoon, R. H., & Yordan, J. (2006). Characterization of surface free energies of talc powders using the thin layer wicking technique. In 2006 SME Annual Conference - Functional Fillers and Nanoscale Minerals: New Markets/New Horizons (Vol. 2006, pp. 101-114)

Characterization of surface free energies of talc powders using the thin layer wicking technique. / Lobato, Emilio; Zhang, Jinhong; Yildirim, Ismail; Yoon, Roe Hoan; Yordan, Jorge.

2006 SME Annual Conference - Functional Fillers and Nanoscale Minerals: New Markets/New Horizons. Vol. 2006 2006. p. 101-114.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Lobato, E, Zhang, J, Yildirim, I, Yoon, RH & Yordan, J 2006, Characterization of surface free energies of talc powders using the thin layer wicking technique. in 2006 SME Annual Conference - Functional Fillers and Nanoscale Minerals: New Markets/New Horizons. vol. 2006, pp. 101-114, 2006 SME Annual Conference, S. Louis, MO, United States, 3/26/06.
Lobato E, Zhang J, Yildirim I, Yoon RH, Yordan J. Characterization of surface free energies of talc powders using the thin layer wicking technique. In 2006 SME Annual Conference - Functional Fillers and Nanoscale Minerals: New Markets/New Horizons. Vol. 2006. 2006. p. 101-114
Lobato, Emilio ; Zhang, Jinhong ; Yildirim, Ismail ; Yoon, Roe Hoan ; Yordan, Jorge. / Characterization of surface free energies of talc powders using the thin layer wicking technique. 2006 SME Annual Conference - Functional Fillers and Nanoscale Minerals: New Markets/New Horizons. Vol. 2006 2006. pp. 101-114
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