The suspected reason for the decreased contact angle
was increased oxygen content at the surface of the Company D coating from process termination by venting to atmosphere, where oxygen terminates free radicals of the Parylene polymer chain and leaves an oxygenated functional group, such as hydroxyl (-OH), that decreases contact angle
, increases hydrophilicity, and decreases hydrophobicity.
NanoPhos tested the final panels for their water and oil repellency properties through contact angle
measurements and visual inspection.
Our results showed that polymer concentration influenced porosity and contact angle
to some degree, the results were depicted in Fig.
The initial contact angle
was measured and wettability was estimated.
of the grafted film revealed a decreased of surface wettability which means the films have a hydrophobic surfaces.
Regardless, the fatty acid chain provides a hydrophobic envelope for the bagasse architecture, the increasing of contact angle
of water droplet by the grafting demonstrates this envelope.
1[degrees] while the treadmill speed remained constant, the initial contact of the hand with the pushrim was found to move slightly forward, while the total contact angle
was initially decreased and remained stable for slopes equal to or greater than 3.
The higher amine content of the high charge ELP/ELP-PA surface made a more hydrophilic and resulted in a lower water contact angle
than that of the low charge ELP/ELP-PA blend.
The contact angles
of drops formed on the surface of microscope slides were used to further assess surface characteristics, (12) with smaller contact angles
indicating greater hydrophilicity and larger contact angles
indicating greater hydrophobicity (Figure 2).
11), (12) A surface with water contact angle
higher than 150[degrees] and sliding angle lower than 10[degrees] is usually defined as a superhydrophobic surface.
measurements are often used to indicate clay wettability and interfacial tension (Rogers et al.
When the researchers applied several layers of the coating on the fabric, the contact angle
(a measure of water-repellence) was about 154 degrees, making it even more repellent than car wax (90-degree contact angle
), Teflon (95-degree contact angle
) or products that repel rainwater from car windshields (110-degree contact angle