Abstract
This paper introduces a carbonyl iron–PDMS (CI–PDMS) composite magnetic elastomer in which carbonyl iron (CI) particles are uniformly distributed in a PDMS matrix. The CI particles and the PDMS were mixed at different weight ratios and tested to determine the influence of CI concentration. The magnetic and mechanical properties of the magnetic elastomers were characterized, respectively, by vibrating-sample magnetometer and by tensile testing using a mechanical analyzer. The elastomer was found to exhibit high magnetization and good mechanical flexibility. The morphology and deformation of the CI–PDMS membrane also were observed. A magnetically actuated microfluidic mixer (that is, a micromixer) integrated with CI–PDMS elastomer membranes was successfully designed and fabricated. The high efficiency and quality of the mixing makes possible the impressive potential applications of this unique CI–PDMS material in microfluidic systems.
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Acknowledgments
This publication is based on work partially supported by Award No. SA-C0040/UK-C0016, made by King Abdullah University of Science and Technology (KAUST), Hong Kong RGC grants HKUST 603608. The work was also partially supported by the Nanoscience and Nanotechnology Program at HKUST. The authors would like to give thanks to Dr. Yongjian Wang and Dr. Zuli Xu for their help in the SEM image taking.
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Li, J., Zhang, M., Wang, L. et al. Design and fabrication of microfluidic mixer from carbonyl iron–PDMS composite membrane. Microfluid Nanofluid 10, 919–925 (2011). https://doi.org/10.1007/s10404-010-0712-2
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DOI: https://doi.org/10.1007/s10404-010-0712-2