Water Contact Angles and Hysteresis of Polyamide Surfaces

Extrand, C. W.

doi:10.1006/jcis.2001.8172

Cited by 90 publications

(93 citation statements)

References 45 publications

(43 reference statements)

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“…This behaviour can be easily explained by the decay of the material, due to its instability to the gamma rays [23] used for its sterilization, and by the wear caused by the advancing wear process. This last effect leads to the variation of the polyethylene surface wettability [24][25][26][27], which becomes more and more hydrophilic and results in a consequent diminution of the Dh. The Dh values shown in the diagram are that of a unworn surface and did not take this variation into consideration.…”

Section: Resultsmentioning

confidence: 98%

The Difference of Material Wettability as Critical Factor in the Choice of a Tribological Prosthetic Coupling Without Debris Release

2005

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Today, in spite of the long experience acquired in the field of total hip replacements, prosthetic systems are still far from reproducing the natural system. One of the main causes of long term failure is the amount of wear debris produced by the tribological coupling between acetabolar cup and femoral head. The authors carried out experimental research in order to investigate the tribological coupling of various prosthetic biomaterials. Experimental tests were carried out with the pin-on-disc tribometer in dry, water and human serum as lubricant. This study sets new bases for the design of modern hip prostheses: 1. the wettability difference among the materials in tribological coupling, which is the necessary condition to promote efficient lubrication; 2. the use of Peek reinforced with long and unidirectional carbon fibres in the prosthetic field.

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Section: Resultsmentioning

confidence: 98%

The Difference of Material Wettability as Critical Factor in the Choice of a Tribological Prosthetic Coupling Without Debris Release

2005

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“…It is widely known [5,14,[18][19][20] that hydrophilicity of polymer fibers treated by LTP decreases progressively with storage time in air atmosphere after treatment. Such contact angle increase was explained by rotation of chemical hydrophilic groups towards the bulk of the fiber and depends on the storage conditions [21], in a process known as ageing.…”

Section: Resultsmentioning

confidence: 99%

Study on the influence of scouring on the wettability of keratin fibers before plasma treatment

et al. 2008

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The present paper studies the wetting behavior and shrink-resistance of keratin fibers prepared by solvent extraction or by industrial-like surfactant washing as well as their response to plasma treatments. The results obtained reveal that keratin fibers can be prepared by surfactant washing instead of using solvents, which will allow carrying out research studies in closer conditions to the industrial reality, and indeed in a much economic and environmentally friendly way.

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“…Over the last years there have been an increasing number of publications which confirmed the presence of contact angle hysteresis even on smooth, homogeneous surfaces [8][9][10][11][12][13]. The most convincing evidence for the presence of the above mentioned phenomenon is its presence on free liquid films [14][15][16][17][18][19].…”

Section: Hysteresis Of Contact Angle On Smooth Homogeneous Substratesmentioning

confidence: 99%

Hysteresis of Contact Angle of Sessile Droplets on Smooth Homogeneous Solid Substrates via Disjoining/Conjoining Pressure

Kuchin

Starov

2015

Langmuir

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A theory of contact angle hysteresis of liquid droplets on smooth, homogeneous solid substrates is developed in terms of shape of disjoining/conjoining pressure isotherm and quasi-equilibrium phenomena. It is shown that all contact angles, θ, in the range r θ <θ< a θ , which are different from the unique equilibrium contact angle θ ≠ e θ , correspond to the state of slow "microscopic" advancing or receding motion of the liquid if e θ <θ< a θ or r θ <θ< e θ , respectively. This "microscopic" motion almost abruptly becomes fast "macroscopic"advancing or receding motion after the contact angle reaches the critical values a θ or r θ , correspondingly. The values of the static receding, r θ , and static advancing, a θ , contact angles in cylindrical capillaries were calculated earlier, based on the shape of disjoining/conjoining pressure isotherm. It is shown now that both advancing and receding contact angles of a droplet on a on smooth, homogeneous solid substrate (i) can be calculated based on shape of disjoining/conjoining pressure isotherm, (ii) both advancing and receding contact angles depend on the drop volume and are not unique characteristics of the liquid-solid system. The latter is different from advancing/receding contact angles in thin capillaries. It is shown also that the receding contact angle is much closer to equilibrium contact angle than the advancing contact angle. The latter conclusion is unexpected and is in a contradiction with commonly accepted view that the advancing contact angle can be taken as the first approximation for the equilibrium contact angle. The dependency of hysteresis contact angles on the drop volume has a direct experimental confirmation.

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Water Contact Angles and Hysteresis of Polyamide Surfaces

Cited by 90 publications

References 45 publications

The Difference of Material Wettability as Critical Factor in the Choice of a Tribological Prosthetic Coupling Without Debris Release

The Difference of Material Wettability as Critical Factor in the Choice of a Tribological Prosthetic Coupling Without Debris Release

Study on the influence of scouring on the wettability of keratin fibers before plasma treatment

Hysteresis of Contact Angle of Sessile Droplets on Smooth Homogeneous Solid Substrates via Disjoining/Conjoining Pressure

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