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3D Printing Tannic Acid-Based Gels via Digital Light Processing.

Ning Li1, Zuojia Xiang1, Youjie Rong1

  • 1Laboratory of Biomaterial Surface and Interface, Institute of new carbon materials, Taiyuan University of Technology, Taiyuan, Shanxi Province, 030024, P. R. China.

Macromolecular Bioscience
|January 25, 2022
PubMed
Summary

Researchers developed a 3D printing method for polyphenol gels using tannic acid (TA) and glycerol. This innovation overcomes limitations, enabling complex gel structures with enhanced toughness and antioxidant properties.

Keywords:
acrylamidedigital light processingpolyphenoltannic acid

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • 3D Printing Technology

Background:

  • Photocurable polyphenol-based gels are challenging to 3D print due to catechol groups scavenging photoinitiator radicals.
  • Existing methods face limitations in creating complex architectures with desirable material properties.

Purpose of the Study:

  • To develop a novel photocurable 3D printing strategy for polyphenol-based gels.
  • To enhance the properties of 3D printed gels using tannic acid and glycerol.

Main Methods:

  • Fabrication of poly-acrylamide (PAM) and tannic acid (TA) gels using a digital light processing (DLP) 3D printer.
  • Utilizing glycerol as a shielding agent for TA to prevent radical scavenging during photopolymerization.
  • Creating a polymer network interpenetrated by a TA-glycerol complex.

Main Results:

  • Successfully 3D printed complex gel architectures with TA-glycerol.
  • Achieved improved gel properties including enhanced toughness, anti-dehydration, antioxidant, and antibacterial capabilities.
  • Demonstrated a viable method for photocurable 3D printing of polyphenol-based materials.

Conclusions:

  • The developed strategy enables the photocurable 3D printing of advanced polyphenol-based gels.
  • Glycerol effectively shields tannic acid, facilitating complex gel fabrication.
  • These findings open avenues for applications in soft wearable devices and tissue engineering.