Characterization of bonding between poly(dimethylsiloxane) and cyclic olefin copolymer using corona discharge induced grafting polymerization

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:365

Article

Liu, Ke¹  Gu, Pan¹  Hamaker, Kiri²  Fan, Z. Hugh^1,2 

[1] Univ Florida, Dept Mech & Aerosp Engn, Interdisciplinary Microsyst Grp, Gainesville, FL 32611 USA

[2] Univ Florida, J Crayton Pruitt Family Dept Biomed Engn, Gainesville, FL 32611 USA

关键词: Surface modification;    Microfluidic valves;    Thermoplastics;    Elastomer;   

DOI  :  10.1016/j.jcis.2011.09.004

来源: Elsevier

【 摘 要 】

Thermoplastics have been increasingly used for fabricating microfluidic devices because of their low cost, mechanical/biocompatible attributes, and well-established manufacturing processes. However, there is sometimes a need to integrate such a device with components made from other materials such as polydimethylsiloxane (PDMS). Bonding thermoplastics with PDMS to produce hybrid devices is not straightforward. We have reported our method to modify the surface property of a cyclic olefin copolymer (COC) substrate by using corona discharge and grafting polymerization of 3-(trimethoxysilyl)propyl methacrylate; the modified surface enabled strong bonding of COC with PDMS. In this paper, we report our studies on the surface modification mechanism using attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and contact angle measurement. Using this bonding method, we fabricated a three-layer (COC/PDMS/COC) hybrid device consisting of elastomer-based valve arrays. The microvalve operation was confirmed through the displacement of a dye solution in a fluidic channel when the elastomer membrane was pneumatically actuated. Valve-enabled microfluidic handling was demonstrated. (C) 2011 Elsevier Inc. All rights reserved.

【 授权许可】

Free