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contact angle
With the increase of DHPDMS content, the water contact angle increased while the surface tension decreased.
      
As the DHPDMS content increases above 5%, both the contact angle and the surface tension tend to approach a constant.
      
The contact angle increases with increasing temperature, and it tends to approach a constant when the temperature is higher than 50°C.
      
Surface energy of preservative-treated southern yellow pine (Pinus spp.) by contact angle measurement
      
Based on the contact angle data, the surface energy was obtained from the acid-base approach.
      
The water contact angle data show that grafting of PEG400 onto PE can greatly improve the hydrophilicity of the PE surface.
      
With all water contact angle smaller than 74.3°, the crosslinked films demonstrated good hydrophilic properties.
      
When the meniscus advanced over the yet unwetted surface, the dynamic contact angle θd greatly depended on V, this dependence was the more pronounced, the smaller the r value.
      
The results obtained cannot be explained in terms of hydrodynamic and barrier theories of the contact angle.
      
On the basis of model calculations, the deviations (due to digitization of the interface profile during its digital processing) of the resultant surface tension and contact angle from exact values are estimated.
      
As ΔPincreases, an advancing meniscus forms contact angle of 50°-60° due to the film rupture when it reaches critical pressure in the thinnest part near the meniscus.
      
The contact angles are shown to increase with a decreasing microsphere radius, whereas the hysteresis of the contact angle decreases.
      
It was also established that, for the investigated systems, the contact angle is virtually independent of the composition of the liquid phase.
      
The contact angle in saturated water vapors, θv = 84°, was calculated from these values.
      
After adsorption, the quartz surface is hydrophobized: the contact angle measured by the bubble method is close to 33°-34°.
      
It is shown that the water contact angle on the membrane surface decreases as a result of modification, and the extent of its change depends on the duration and temperature of membrane treatment.
      
It was established that the character of glass wetting is determined by the presence of cationic surfactant in the mixture: contact angle isotherms θ(c0) exhibit maximum, as in the case of individual cationic component solutions.
      
Large hysteresis of contact angle can probably be related to the formation of metastable wetting film behind the receding meniscus.
      
Determination of the Capillary Size and Contact Angle of Fibers from the Kinetics of Liquid Rise along the Vertical Samples of F
      
For alkanes and water, and in a limited range of drop sizes where gravity can be ignored, the model accounts very well for the dynamics of the drop radius, and rather well for the contact angle.
      
 

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