Hydrophilicity of Surfactant-Added Poly(dimethylsiloxane) and Its Applications
JAPANESE JOURNAL OF APPLIED PHYSICS(2011)
摘要
This paper discusses the hydrophilicity of surfactant-added poly(dimethylsiloxane) (PDMS) and its applications. The contact angle of water droplets was measured in order to study the short- and long-term stability of the hydrophilicity of PDMS combined with various concentrations of the surfactant Silwet L-77 as a wetting agent. In the short-term, the contact angle was measured every 20 s for 10 min and decreased dramatically with time as the concentration of surfactant was increased from 0 to 1%. In water droplets observed for 800 h, the hydrophobic recovery of the surfactant-added PDMS was very weak and minor. As applications, a micropump and pneumatic actuators were fabricated using only surfactant-added PDMS. The basic properties of surfactant-added PDMS, such as the contact angle of the water head in the microchannel and Young's modulus, were measured and discussed. (c) 2011 The Japan Society of Applied Physics
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关键词
young s modulus,contact angle
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