Hydrogel coating on soft polymeric substrates for microfluidic devices
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In microfabricated MEMS actuator, sensor and biomedical devices, soft polymeric materials like PDMS are widely used for lightweight, low cost, high corrosion resistance, high flexibility and high dimensional stability. Along with their numerous beneficial functions these materials have some shortcomings during real application for their hydrophobic high frictional surface and stiction. In this work we have developed a facile way of hydrogel coating on PDMS substrate by highly hydrophilic hydrogels N,N, dimethylacrylamide as a monomer. This gel is highly hydrophilic in nature having biocompatibility and shows very low friction coefficient value in wet condition. Frictional property, wettability and the surface morphology were studied and comparison between coated and uncoated surface has been made to understand the coating phenomenon clearly.
This study was partly supported by the Grant-in-Aid for Scientific Research (Category B, Project No.: 25288094, etc.) from the Japan Society for the Promotion of Science (JSPS), the national project named “Green Tribology Innovation Network” in the area of Advanced Environmental Materials, Green Network of Excellence (GRENE), the Innovative Innovation Generation Program (Center Of Innovation, COI-T) from the JST and the Ministry of Education, Culture, Sports, Science and Technology (MEXT) in Japan, the Regional Open Innovation Promotion Project from the Ministry of Economy in Japan, and the Strategic Innovation Creation Project (SIP) from the New Energy and Industrial Technology Development Organization (NEDO) of Japan.
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