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论文类型：期刊论文

发表时间：2010-06-15

发表刊物：TALANTA

收录刊物：SCIE、EI、PubMed

卷号：81

期号：4-5

页面范围：1331-1338

ISSN号：0039-9140

关键字：Ultrasonic welding; Microfluidic device; Thermal assisted ultrasonic bonding; Micromixer

摘要：A thermal assisted ultrasonic bonding method for poly(methyl methacrylate) (PMMA) microfluidic devices has been presented The substrates were preheated to 20-30 degrees C lower than glass transition temperature (T(g)) of the polymer. Then low amplitude ultrasonic vibration was employed to generate facial heat at the interface of PMMA substrates. PMMA microfluidic chips were successfully bonded with bulk temperature well below T(g) of the material and with pressure two orders lower than conventional thermal bonding, which was of great benefit to reduce the deformation of microstructures. The bonding process was optimized by Taguchi method. This bonding technique showed numerous superiorities including high bonding strength (0 95 MPa). low dimension loss (0 3-0.8%) and short bonding time. Finally, a micromixer was successfully bonded by this method and its performance was demonstrated. (C) 2010 Elsevier B.V. All rights reserved.