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3D printable and stimuli-responsive colorimetric silicone composites.

Boyu Wang1, Fei Xiao1,2, Zhuoheng Wei1,2

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Researchers developed 3D printable, color-changing silicone composites using functional dyes. These novel materials act as effective sensors for detecting ammonia and seafood spoilage, expanding the use of silicone in sensing applications.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Sensor Technology

Background:

  • Silicone composites are widely used for their biocompatibility and flexibility.
  • Current silicone materials lack color-changing properties and responsiveness, limiting their use as sensors.
  • Developing stimuli-responsive silicone materials is crucial for advanced sensing applications.

Purpose of the Study:

  • To create 3D printable, color-changing silicone composites.
  • To demonstrate the application of these composites as colorimetric sensors.
  • To explore the versatility of the developed ink formulation and printing method.

Main Methods:

  • Additive manufacturing using direct ink writing of thermally crosslinkable organosilicon compounds.
  • Incorporation of functional dyes (fluorescein and rhodamine derivatives) into silicone inks.
  • Fabrication of 2D films and 3D complex geometries.

Main Results:

  • Successfully printed 3D stimuli-responsive colorimetric silicone composites.
  • Demonstrated sensor applications for detecting trace ammonia and seafood spoilage.
  • Validated the ink formulation's compatibility with various pH-sensitive dyes and metal-ligand complexes.

Conclusions:

  • Additive manufacturing enables the creation of versatile, stimuli-responsive colorimetric silicone composites.
  • These materials offer a promising platform for developing low-cost, visual sensors.
  • The facile fabrication protocol supports broad applicability in sensing technologies.