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Planar and Three-Dimensional Printing of Conductive Inks
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3D Printing by Multiphase Silicone/Water Capillary Inks.

Sangchul Roh1, Dishit P Parekh1, Bhuvnesh Bharti2

  • 1Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695, USA.

Advanced Materials (Deerfield Beach, Fla.)
|June 8, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces a novel 3D printing method using polydimethylsiloxane (PDMS) capillary suspension ink. This technique enables the creation of elastic, flexible 3D printed structures, ideal for biomedical applications.

Keywords:
3D printingmultiphase gelsoft matterstimuli-responsive actuator

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Biomedical Engineering

Background:

  • 3D printing of polymers typically uses thermoplastics due to rapid solidification.
  • Printing with liquid polymer precursors like polydimethylsiloxane (PDMS) is challenging due to slow curing times.
  • Developing efficient methods for 3D printing PDMS is crucial for advanced material applications.

Purpose of the Study:

  • To demonstrate an efficient technique for 3D printing with polydimethylsiloxane (PDMS).
  • To utilize a capillary suspension ink containing both precured and uncured PDMS in an aqueous medium.
  • To explore the properties and applications of the resulting 3D printed PDMS structures.

Main Methods:

  • Development of a capillary suspension ink with PDMS microbeads and liquid precursor in water.
  • Utilizing the thixotropic properties of the suspension for direct ink writing.
  • 3D printing and curing of PDMS structures in both air and underwater environments.

Main Results:

  • The capillary suspension ink exhibits high storage moduli and yield stresses suitable for direct ink writing.
  • Successfully 3D printed PDMS structures demonstrate remarkable elasticity, flexibility, and extensibility.
  • The biocompatible and porous nature of the printed material allows for direct printing in aqueous media.

Conclusions:

  • The developed capillary suspension ink provides an efficient method for 3D printing PDMS.
  • The resulting PDMS structures possess desirable mechanical properties for various applications.
  • This technique is particularly promising for 3D printed biomedical products and direct bioscaffold printing on live tissue.