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4D-printed pH sensing claw.

Chun-Yi Wu1, Jing-Ru Chen1, Cheng-Kuan Su1

  • 1Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, ROC.

Analytica Chimica Acta
|April 10, 2022
PubMed
Summary
This summary is machine-generated.

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This study demonstrates a novel pH sensing device fabricated using four-dimensional printing (4DP). The device exhibits pH-dependent geometric changes, enabling reliable non-electrochemical and non-optical pH measurements for complex samples.

Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Chemical Engineering

Background:

  • Traditional analytical devices often require complex fabrication processes.
  • Four-dimensional printing (4DP) offers a pathway to create stimuli-responsive materials and devices.
  • Integrating stimuli-responsive polymers into 3D-printed structures can lead to novel functionalities.

Purpose of the Study:

  • To develop a pH measurement device using 4DP technology.
  • To demonstrate pH-dependent geometric changes in a 4D-printed device.
  • To validate the analytical reliability of the 4D-printed pH sensing device for real-world samples.

Main Methods:

  • Utilized acrylonitrile butadiene styrene (ABS) and poly(4-vinylpyridine) (P4VP)-incorporated ABS filaments.
Keywords:
Four-dimensional printingFunctionalized thermoplasticsStimuli-responsive materialThree-dimensional printingpH

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  • Employed multi-material fused deposition modeling three-dimensional printing (3DP) for device fabrication.
  • Investigated pH-dependent swelling and geometric changes (ΔH) of the 4D-printed device.

    • Main Results:

    • The 4D-printed device showed a linear relationship between geometric change (ΔH) and pH in the range of 5.0 to 8.6.
    • The device exhibited pH-dependent lifting along the z-axis due to selective swelling of P4VP-containing regions.
    • Successful pH analysis of complex real samples was achieved, confirming analytical reliability.

    Conclusions:

    • 4DP technology enables the direct fabrication of stimuli-responsive sensing devices.
    • The developed pH sensing claw offers a non-electrochemical and non-optical method for pH analysis.
    • This work highlights the potential of 4DP in diversifying analytical chemistry and creating smart sensing devices.