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Flexible PBAT-Based Composite Filaments for Tunable FDM 3D Printing.

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Summary

This study introduces biobased composites using zein-titanium dioxide complex microparticles to enhance poly(butylene adipate-co-terephthalate) (PBAT). These enhanced PBAT composites demonstrate improved thermo-mechanical properties and successful 3D printing via fused deposition modeling (FDM).

Keywords:
3D printingbiocompositefused deposition modelingpoly(butylene adipate-co-terephthalate)zein-titanium dioxide complex

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Area of Science:

  • Materials Science
  • Polymer Science
  • Biomaterials

Background:

  • Developing sustainable and eco-friendly materials is crucial for reducing environmental impact.
  • Poly(butylene adipate-co-terephthalate) (PBAT) is a biodegradable polyester with potential for various applications.
  • Enhancing the properties of biobased polymers like PBAT is essential for broader material adoption.

Purpose of the Study:

  • To create novel biobased composites using a zein-titanium dioxide complex (ZTC) as reinforcement for PBAT.
  • To investigate the effects of ZTC addition on the thermo-mechanical properties and 3D printability of PBAT.
  • To assess the interfacial adhesion and preliminary biocompatibility of the developed composite materials.

Main Methods:

  • Preparation of PBAT/ZTC composite filaments with varying ZTC concentrations (5-40 wt%).
  • Characterization of thermo-mechanical properties (storage modulus, glass transition temperature, creep compliance).
  • Analysis of interphase adhesion using Scanning Electron Microscopy (SEM) and Fourier-Transform Infrared Spectroscopy (FTIR).
  • Evaluation of 3D printability using fused deposition modeling (FDM) and preliminary biocompatibility tests.

Main Results:

  • Increased ZTC content led to higher storage modulus and a slight rise in glass transition temperature.
  • Composites exhibited improved resistance to deformation under stress with higher ZTC concentrations.
  • SEM and FTIR confirmed good dispersion of ZTC microparticles and the formation of hydrogen bonds at the PBAT-ZTC interface.
  • Successful 3D printing of complex structures was achieved, and preliminary biocompatibility tests showed no cytotoxicity.

Conclusions:

  • Zein-titanium dioxide complex microparticles effectively reinforce PBAT, enhancing its thermo-mechanical performance.
  • The developed PBAT/ZTC composites show excellent interfacial adhesion and good 3D printability.
  • These biobased composites represent a promising sustainable material with potential for various applications, including those requiring biocompatibility.