Low‐rate dynamic contact angles on polystyrene and the determination of solid surface tensions

Kwok, Daniel Y.; Lam, C.N. Catherine; Li, Abby; Zhu, K.; Wu, Rebecca; Neumann, A. W.

doi:10.1002/pen.10338

Cited by 90 publications

(72 citation statements)

References 28 publications

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“…However, it should be noted that Wu used only two liquids to infer the surface energy of PS; in this case, the two liquids used were water and diiodomethane. Kwok et al 17 used the Neumann's equation and obtained ␥ ϭ 29.8 mN/m as an average value for PS at 23.0°C corroborating our results.…”

Section: Neumann's Equationsupporting

confidence: 93%

“…7,17 Also, the values of the surface energy of VECTRA evaluated in this work using the harmonic and geometric mean equations and using the pair of liquids formamide and water and diiodomethane and water are in reasonable agreement with data published in the literature. 13,18 It can be seen from Table III that the values of surface energy of PP found in this work using the geometric mean equation corroborate the ones published.…”

Section: Surface Energy Using Geometric Mean Harmonic Mean and Neumsupporting

confidence: 77%

“…7,13,14,17,18 The experimental values of the contact angle were used to calculate the surface energy using the harmonic mean equation, the geometric mean equation, and Neumann's equation and to evaluate the critical surface tension according to Zisman and Saito for the polymers studied in this work.…”

Section: Resultsmentioning

confidence: 99%

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Evaluation of surface energy of solid polymers using different models

Shimizu

Demarquette

2000

J. Appl. Polym. Sci.

178

121

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ABSTRACT:In the present work, contact angles formed by drops of diethylene glycol, ethylene glycol, formamide, diiodomethane, water, and mercury on a film of polypropylene (PP), on plates of polystyrene (PS), and on plates of a liquid crystalline polymer (LCP) were measured at 20°C. Then the surface energies of those polymers were evaluated using the following three different methods: harmonic mean equation and geometric mean equation, using the values of the different pairs of contact angles obtained here; and Neumann's equation, using the different values of contact angles obtained here. It was shown that the values of surface energy generated by these three methods depend on the choice of liquids used for contact angle measurements, except when a pair of any liquid with diiodomethane was used. Most likely, this is due to the difference of polarity between diiodomethane and the other liquids at the temperature of 20°C. The critical surface tensions of those polymers were also evaluated at room temperature according to the methods of Zisman and Saito using the values of contact angles obtained here. The values of critical surface tension for each polymer obtained according to the method of Zisman and Saito corroborated the results of surface energy found using the geometric mean and Neumann's equations. The values of surface energy of polystyrene obtained at 20°C were also used to evaluate the surface tension of the same material at higher temperatures and compared to the experimental values obtained with a pendant drop apparatus. The calculated values of surface tension corroborated the experimental ones only if the pair of liquids used to evaluate the surface energy of the polymers at room temperature contained diiodomethane.

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Section: Neumann's Equationsupporting

confidence: 93%

Section: Surface Energy Using Geometric Mean Harmonic Mean and Neumsupporting

confidence: 77%

See 1 more Smart Citation

Evaluation of surface energy of solid polymers using different models

Shimizu

Demarquette

2000

J. Appl. Polym. Sci.

178

121

View full text Add to dashboard Cite

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“…Combining This equation was the start point for several attempts to obtain mathematical expressions or numerical procedures able to provide the values of γS and γSL when only the values of γL and θY are known. The most relevant solutions [26] were given by Fox and Zisman [27], Owens and Wendt [28], Janczuk and Bialopiotrowicz [29], Wu [30], van Oss, Chaudhury and Good [31], Li and Neumann [25], Kwok et al [32], Shimizu and Demarquette [33] and Chibowski et al [34]. Except for the LiNeumann method, all the mentioned solutions use a pair or more liquids to calculate the surface energy of the solid and the interface solid-liquid.…”

Section: Introductionmentioning

confidence: 99%

The Thermodynamic Characterization of Wetting by Submitting a Sessile Drop to Microgravity

Calvimontes¹

2017

Preprint

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Abstract:A new technique, the sessile drop accelerometry (SDACC) for the study and measurement of the interfacial energies of solid-liquid-gas systems is tested and discussed in this study. The instrument -a combination of a goniometer with high speed camera and a laboratory drop towerand the evaluation method, were designed to evaluate the interfacial energies as a function of the geometrical changes of a sessile drop shape due to the effect of "switching off" gravity during the experiment. The method bases on the thermodynamic equilibrium of the system interfaces and not on the balance of bi-dimensional tensors on the solid-liquid-gas contour line. A comparison of the model with the widely accepted Young`s equation is discussed in this study.

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“…Of the four parameters of Young [26] were given by Fox and Zisman [27], Owens and Wendt [28], Janczuk and Bialopiotrowicz [29], Wu [30], van Oss, Chaudhury and Good [31], Li and Neumann [25], Kwok et al [32], Shimizu and Demarquette [33] and Chibowski et al [34]. Except for the Li-Neumann method, all the mentioned solutions use a pair or more liquids to calculate the surface energy of the solid and the interface solid-liquid.…”

Section: Introductionmentioning

confidence: 99%

The Thermodynamic Characterization of Wetting by Submitting a Sessile Drop to Microgravity

Calvimontes¹

2017

Preprint

View full text Add to dashboard Cite

Abstract:A new method, the sessile drop accelerometry (SDACC) for the study and measurement of the interfacial energies of solid-liquid-gas systems, is tested and discussed in this study. The laboratory instrument and technique -a combination of a drop shape analyzer with high-speed camera and a laboratory drop tower-and the evaluation algorithms, were designed to calculate the interfacial energies as a function of the geometrical changes of a sessile droplet shape due to the effect of "switching off" gravity during the experiment. The method bases on the thermodynamic equilibrium of the system interfaces and not on the balance of bi-dimensional tensions on the solid-liquid-gas contour line. A comparison of the mathematical model that supports the method with the widely accepted Young`s equation is discussed in this study.

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Low‐rate dynamic contact angles on polystyrene and the determination of solid surface tensions

Cited by 90 publications

References 28 publications

Evaluation of surface energy of solid polymers using different models

Evaluation of surface energy of solid polymers using different models

The Thermodynamic Characterization of Wetting by Submitting a Sessile Drop to Microgravity

The Thermodynamic Characterization of Wetting by Submitting a Sessile Drop to Microgravity

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