Home >

news Help

Publication Information


Title
Japanese: 
English:Surface modification of polymers by vacuum ultraviolet Illumination containing low wavelength below 160 nm and microfluidic applications of irradiated polycarbonate 
Author
Japanese: 橋本 優生.  
English: Yuki Hashimoto.  
Language English 
Journal/Book name
Japanese: 
English:Polymer 
Volume, Number, Page Vol. 287       
Published date Oct. 19, 2023 
Publisher
Japanese: 
English:Elsevier 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://doi.org/10.1016/j.polymer.2023.126439
 
DOI https://doi.org/10.1016/j.polymer.2023.126439
Abstract Microfluidic devices are applied in various fields including medicine and drug discovery. Recently, plastics are used for the device due to low cost. One of the challenges is the bonding process. A bonding method that preserves the microstructure is required. Recently, room temperature bonding methods using vacuum ultraviolet (VUV) light have been reported, but the applicable materials are limited. Here, we propose a new method using VUV with a wavelength shorter than 160 nm. As a result of the surface analysis, it was confirmed that the substrate surface becomes hydrophilic upon VUV irradiation. As a result of the bonding test, it was confirmed that it was possible to bond polycarbonate (PC) to each other (maximum bonding force: 2.03 MPa), PC to glass (maximum bonding force: 10.72 MPa), and cyclic olefin polymer to glass (maximum bonding force: 3.51 MPa), which have not been reported so far. The results suggest that one of these bonding mechanisms is the addition of hydrophilicity by VUV irradiation. Based on the results, for the first time, a PC-made microfluidic device was successfully developed using the bonding method. This result greatly contributes to the development of the manufacturing process of plastic microfluidic devices.

©2007 Tokyo Institute of Technology All rights reserved.