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Small volume laboratory on a chip measurements incorporating the quartz crystal microbalance to measure the viscosity-density product of room temperature ionic liquids |
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| Authors: | N Doy G McHale M I Newton C Hardacre R Ge J M MacInnes D Kuvshinov and R W Allen |
| Institution: | 1School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, United Kingdom;2QUILL Center, School of Chemistry and Chemical Engineering, Queens University Belfast, Belfast, BT9 5AG Antrim, Northern Ireland, United Kingdom;3Department of Chemical and Process Engineering, University of Sheffield, Newcastle St., Sheffield S1 3JD, United Kingdom |
| Abstract: | A microfluidic glass chip system incorporating a quartz crystal microbalance (QCM) to measure the square root of the viscosity-density product of room temperature ionic liquids (RTILs) is presented. The QCM covers a central recess on a glass chip, with a seal formed by tightly clamping from above outside the sensing region. The change in resonant frequency of the QCM allows for the determination of the square root viscosity-density product of RTILs to a limit of ∼10 kg m−2 s−0.5. This method has reduced the sample size needed for characterization from 1.5 ml to only 30 μl and allows the measurement to be made in an enclosed system. |
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