Spreading pressures of water and n-propanol on polymer surfaces

Busscher, Henk J.; Kip, Gerhardus A.M.; Silfhout, A. van; Arends, J

doi:10.1016/0021-9797(86)90416-9

Cited by 55 publications

(37 citation statements)

References 15 publications

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“…At each visit, reproducible color slides of the buccal tooth surfaces of the selected teeth were made after plaque disclosure with 0.5% neutral red, as described previously (Quirynen et al, 1985). (Busscher et al, , 1986b For the examination of the differences in plaque growth between and among the four materials-with the influences of the co-variables taken into consideration-for each test day, an analysis of variance was performed with plaque growth as the dependent variable, with the four materials as treatment, and with tooth type, person, and period (nested in person) as block factors (Proc GLM procedure in S.A.S.). Because of the unbalanced design, the least-squares means-i.e., estimations of the population means (Milliken and Johnson, 1984)were used as mean values.…”

Section: Methodsmentioning

confidence: 99%

The Influence of Surface Free-energy on Planimetric Plaque Growth in Man

et al. 1989

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The purpose of this study was to examine the change in plaque area over nine days in vivo on four materials with different sinface freeenergies (s.f e.). Twelve healthy dental students participated in a crossover, split-mouth, double-blind study. Supragingivalplaqueformation was recorded over a nine-day period, on four different materials: fluorethylenepropylene (Teflon) (FEP), parafilm (PAR), cellulose acetate (CA), and enamel (E) with s.f. e. of 20, 26, 57, and 88 erg/cm2, respectively. Strips made from the first three materials were stack to the buccal surface of an upper incisor. The remaining incisor was carefully polished and served as an enamel surface. The increase in plaque was evaluated after three, six, and nine days. A planimetrical analysis was used so that the plaque area could be expressed as a percentage of the total buccal tooth surface. This procedure was repeated on each subject, so that at the end, each pair of central or lateral incisors received the four tested materials.The results indicated that the adherence of micro-organisms on pellicle-coated substrata was influenced by the material's s.f e.; there was an association between the s.fje. of the substrata and the supragingival plaque extension in vivo. High surface free-energy substrata in the oral cavity attracted more micro-organisms than did low energetic materials. Additionally, the bacterial adhesion seemed very weak on surfaces with a low s.f e. J Dent Res 68(5): 796-799, May, 1989 Introduction.

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Section: Methodsmentioning

confidence: 99%

The Influence of Surface Free-energy on Planimetric Plaque Growth in Man

et al. 1989

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“…The surface free energy of the bacterial surface (7b) is equal to the sum of the dispersion part (7b a) and the polar part (7bP). This approach has proven to be valid for low energy surfaces and for high energy surfaces on which spreading pressures may become significant (16). The second approach has been developed by Van Oss et al (17,18) who extended Eq.…”

Section: Contact Angles and Surface Free Energiesmentioning

confidence: 99%

Physicochemical characterization ofEscherichia coli

et al. 1992

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Eight Escherichia coli strains were characterized by determining their adhesion to xylene, surface free energy, zeta potential, relative surface charge, and their chemical composition. The latter was done by applying X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy OR). No relationship between the adhesion to xylene and the water contact angles of these strains was found. Three strains had significantly lower surface free energies than the other strains. Surface free energies were either obtained from polar and dispersion parts or from Lifshitz-van der Waals and acid/base parts of the surface free energy. A correlation (r = 0.97) between the polar parts and the electron-donor contributions to the acid/base part of the surface free energy was found. The zeta potentials of all strains, measured as a function of pH *Author to whom all correspondence and reprint requests should be addressed. Cell Biophysics 1 7Volume 20, 1992 18Harkes et al.(2-11), were negative. Depending on the zeta potential as a function of pH, three groups were recognized among the strains tested. A relationship (r = 0.84) was found between the acid/base component of the surface free energy and the zeta potential measured at pH = 7.4. There was no correlation between results of XPS and IR studies. Data from the literature of XPS and IR studies of the gram-positive staphylococci and streptococci were compared with data from the gram-negative E. coli used in this study. It appeared that in these three groups of bacteria, the polysaccharide content detected by IR corresponded well with the oxygen-to-carbon ratio detected by XPS.

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“…Water and n-octane adsorption isotherms on intact glass surfaces were measured ellipsometrically at 25°C as described in detail previously with a so-called null-type ellipsometer, equipped with a 6328-A wavelength laser (beam diameter 3 mm) (21 ). Adsorption was carried out in a double-walled stainless-steel vacuum vessel in which the temperature was controlled within 0.05 K (for details see Ref.…”

Section: Methodsmentioning

confidence: 99%

“…Adsorption was carried out in a double-walled stainless-steel vacuum vessel in which the temperature was controlled within 0.05 K (for details see Ref. (21 )). The pressure was less than 0.01 Torr for 1 h before the adsorption experiments started.…”

Section: Methodsmentioning

confidence: 99%

“…Generally, data to solve these type of problems are generated from contact angle measurements (10-13), adsorption isotherms ( 5,14,15 ), zeta potentials as measured in specially chosen systems (16)(17)(18)(19), and also ellipsometry (20,21 ). The determination of solid surface free energies higher than those of water such as encountered for ionic crystals or glass (22) is especially a matter of much dispute, as it involves spreading pressure values, which cannot be neglected, as is usually done for low surface free energy materials (23,24).…”

Section: Introductionmentioning

confidence: 99%

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Surface free energy components of glass from ellipsometry and zeta potential measurements

Chibowski

Hołysz

Kip

et al. 1989

Journal of Colloid and Interface Science

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Two different experimental approaches based on ellipsometry and zeta potential measurements have been employed to determine the dispersion and polar surface free energy components of glass. From ellipsometry the adsorption isotherms of n-octane and water have been determined, yielding values for the film pressures of n-octane and water and the dispersion and polar surface free energy components of glass. Similarly, zeta potentials in water of glass covered with various amounts of n-octane and nhexanol have been determined. Next, the film pressures of these liquids and surface free energy components of glass were also calculated. Thus determined values are 32 and 80 m J / m 2 (from ellipsometry) and 25 and 80 m J / m z (from zeta potentials) for the dispersion and polar components, respectively. The correspondence between the surface free energies obtained by two completely independent methods gives confidence to the approaches employed.

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Spreading pressures of water and n-propanol on polymer surfaces

Cited by 55 publications

References 15 publications

The Influence of Surface Free-energy on Planimetric Plaque Growth in Man

The Influence of Surface Free-energy on Planimetric Plaque Growth in Man

Physicochemical characterization ofEscherichia coli

Surface free energy components of glass from ellipsometry and zeta potential measurements

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