Abstract
Different chemicals were tested in order to check their effectiveness as the vapor source for the vapor-assisted method to bond PDMS and glass, bringing clarification to the mechanism of the bonding. While no increase in the adhesion strength of PDMS–glass samples was observed when silanes without chloro functional groups were used, increase in the bonding strength of PDMS–glass was obtained with all alkyl chlorosilanes tested in this study, including tri-, di- and monochlorosilanes, as well as with hydrochloric acid solution. These results experimentally demonstrate that the hydrogen chloride gas obtained from the hydrolysis and polymerization of silanes or simply from the evaporation of hydrochloric acid solution assist with the formation of PDMS–glass bonding, making the vapor-assisted method a very simple and reliable method to bond PDMS and glass with multiple applications in both small-scale laboratory research and large-scale manufacturing processes.
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