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Polyelectrolyte multilayers coating for organic solvent resistant microfluidic chips
Authors:Panittamat Kumlangdudsana  Adisorn Tuantranont  Stephan Thierry Dubas  Luxsana Dubas
Affiliation:1. Nanoscience and Technology Program, Graduate School, Chulalongkorn University, Bangkok 10330, Thailand;2. National Electronics and Computer Technology Center, National Science and Technology Development Agency, Pathumthani 12120, Thailand;3. Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok 10330, Thailand;4. Department of Chemistry Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;1. Centre of Excellence for Polymer Materials and Technologies, Tehnoloski Park 24, SI-1000 Ljubljana, Slovenia;2. Jo?ef Stefan Institute, Department for Complex Matter, Jamova 39, 1000 Ljubljana, Slovenia;3. University of Ljubljana, Faculty of Mathematics and Physics, Jadranska 19, SI-1000 Ljubljana, Slovenia;4. Jo?ef Stefan Institute, Department of Surface Engineering and Optoelectronics, Plasma Laboratory, Jamova 39, 1000 Ljubljana, Slovenia;5. University of Maribor, Faculty of Mechanical Engineering, Laboratory for Characterisation and Processing of Polymers, Smetanova 17, SI-2000 Maribor, Slovenia;1. Department of Applied Physics, Indian School of Mines, Dhanbad 826004, India;2. Inter University Accelerator Centre, New Delhi 110067, India;1. Accelerators & Ion Sources Department, Nuclear Research Center, Atomic Energy Authority, P.O. 13759, Cairo, Egypt;2. Central Lab. for Elemental & Isotopic Analysis, Nuclear Research Center, Atomic Energy Authority, P.O. 13759, Cairo, Egypt;3. Physiology Department, College of Medicine, Taif University, P.O. 888, Taif, KSA;4. Physics Department, Faculty of Science, Zagazig University, P.O. 44519, Zagazig, Egypt;1. Department of Solid State Engineering, University of Chemistry and Technology, 166 28 Prague, Czech Republic;2. Institute of Experimental Physics, Johannes Kepler University, A-4040 Linz, Austria;1. Department of Physics, Presidency College, Chennai, 600 005, India;2. Centre for Nanoscience and Technology, Anna university, Chennai, 600 025, India
Abstract:The layer-by-layer (LbL) deposition technique was used to coat and protect poly(methyl methacrylate) (PMMA) and poly(dimethylsiloxane) (PDMS) substrate from organic solvent. PMMA and PDMS substrates were protected by polyelectrolyte multilayers (PEM) thin films of either poly(diallydimethiyl ammonium chloride) and Poly(styrene sulfonate) PDADMAC/PSS or chitosan/alginate. The PEM depositited on the PMMA and PDMS substrates improved the organic solvent resistance with the best results obtained from the chitosan/alginate over the PDADMAC/PSS pair. The more hydrophilic character of the chitosan/alginate and the PDADMAC/PSS film caused a significant decreasing rate of organic solvent pentration into the PMMA substrate which retain transparent optical properties for up to 30 dipping in acetonitrile. A 20 layers chitosan alginate film also decreased PDMS substrate swelling when exposed to chloroform vapor. The PEMs coating could protect the PMMA and PDMS sample against organic solvent and vapor which could make them useful in microfluidic systems even in agressive environment.
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