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Water permeable flow of polydimethylsiloxane controlled by physicochemical treatment

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Abstract

For polydimethylsiloxane (PDMS), a formation of interconnected pores and an addition of Silwet L-77 are, respectively, made as physical treatment and chemical one to change the material properties involved in the water permeable flow through PDMS. Here, we investigate a change in the water permeable flow through PDMS induced by physicochemical treatment. 28 kinds of physicochemically treated PDMS (pc-PDMS) blocks having different pore sizes of 50–500 µm and different Silwet L-77 concentrations of 0.0–8.0 wt% are prepared using a pressure-assisted compaction and NaCl particle-leaching technique. The values of mass flow rate and flow delay are obtained from pressure-driven water flow through pc-PDMS blocks as indexes for characterizing their water permeable flow. Our physicochemical treatment successfully controls the water permeable flow through PDMS, which means that pc-PDMS can be used for the development of powerless microfluidic regulators for aqueous chemicals in micro-total analysis systems (µ-TAS).

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Acknowledgements

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT & Future Planning (NRF-2017R1A2B4010300).

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Authors and Affiliations

  1. Department of Mechanical Engineering, Inha University, Incheon, 22212, Republic of Korea

    Gyungmok Nam, Sungmin Park, Sangheon Park, Young Choi, Seungpyo Woo & Sang-Hee Yoon

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  1. Gyungmok Nam
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  2. Sungmin Park
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  3. Sangheon Park
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  4. Young Choi
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  5. Seungpyo Woo
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  6. Sang-Hee Yoon
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Correspondence to Sang-Hee Yoon.

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Nam, G., Park, S., Park, S. et al. Water permeable flow of polydimethylsiloxane controlled by physicochemical treatment. JMST Adv. 1, 41–47 (2019). https://doi.org/10.1007/s42791-019-0005-1

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  • DOI: https://doi.org/10.1007/s42791-019-0005-1

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