Measurements were made of zeta potential of low-rank coals, the surface of which was previously covered with apolar liquid to different degrees. The zeta potentials were then used for determination of the film pressure of this liquid, making it possible to calculate the apolar Lifshitz-van der Waals
✦ LIBER ✦
The surface free energy of low rank coals precovered with diacetone alcohol
✍ Scribed by Bronisław Jańczuk; Wiesław Wójcik; Anna Zdziennicka
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 540 KB
- Volume
- 71
- Category
- Article
- ISSN
- 0016-2361
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The surface free energy and surface structure of poly(tetrafluoroethylene) (PTFE) film treated with low temperature plasma in O 2 , Ar, He, H 2 , NH 3 , and CH 4 gases are studied. The contact angles of the samples were measured, and the critical surface tension g c (Zisman) and g c (max) were deter