Abstract
In this study, a cryogenic abrasive air jet machining (CAAJM) experimental system is designed and built based on the glass transition characteristics of polydimethylsiloxane (PDMS). Fixed processing parameters are then used to evaluate the effectiveness of machining PDMS by abrasive air jet machining (AAJM) at room and cryogenic temperatures, and the results show that cryogenic could improves the processing quality of PDMS. Furthermore, the potential effects of cryogenic treatment on the mechanical properties and wettability of PDMS were analyzed. The results showed that the mechanical properties was slightly decreased under cryogenic treatment, but the wettability was slightly increased. These resulted will further promote the application of CAAJM in the field of microfluidic analytical system. Based on this, experiments are conducted into how microchannel processing quality is influenced by the scanning speed and the erosion distance, pressure, and angle. The results show that better PDMS microchannels are processed when the erosion distance is 2.5–3.5 μm, the erosion pressure is 0.4 MPa, the erosion angle is 60–75°, and the scanning speed is 0.25 mm/s.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Funding
This work has been supported by the National Natural Science Foundation of China (Grant No. 52075254), Project supported by the Joint Funds of the National Natural Science Foundation of China (No. U20A20293) and Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX20_0183).
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GZ: Investigation, Data curation, Visualization, Writing—original draft. YS: Project administration, Funding acquisition, Writing—review & editing. XL: Investigation, Visualization. HG: Data curation, DZ: Conceptualization, Supervision. Visualization.
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Zhang, G., Sun, Y., Liu, X. et al. Experimental investigations of machining characteristics on polydimethylsiloxane (PDMS) by cryogenic abrasive air-jet machining. Int J Adv Manuf Technol 118, 2711–2723 (2022). https://doi.org/10.1007/s00170-021-08147-3
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DOI: https://doi.org/10.1007/s00170-021-08147-3