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Related Experiment Video

Updated: Sep 11, 2025

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Highly-Oriented Polylactic Acid Fiber Reinforced Polycaprolactone Composite Produced by Infused Fiber Mat Process for

Zhipeng Deng1, Chen Rao1, Simin Han1

  • 1School of Materials, Sun Yat-sen University, Shenzhen Campus, Shenzhen 518107, China.

Polymers
|August 14, 2025
PubMed
Summary

This study developed a polylactic acid (PLA) fiber reinforced polycaprolactone (PCL) composite for 3D printed scaffolds. The novel VARI process significantly enhances mechanical properties, overcoming PCL limitations for tissue engineering applications.

Keywords:
3D print processPCL compositePLA fiber matmechanical propertiesorientation anglevacuum assisted resin infusion

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Area of Science:

  • Biomaterials Engineering
  • Tissue Engineering
  • Polymer Science

Background:

  • Polycaprolactone (PCL) scaffolds are promising for tissue engineering due to biocompatibility and biodegradability.
  • However, PCL's inherent poor mechanical properties limit its clinical applications.
  • Enhancing mechanical performance is crucial for advancing PCL-based scaffolds.

Purpose of the Study:

  • To develop a novel polylactic acid (PLA) fiber reinforced PCL (PLA/PCL) composite filament for 3D printed scaffolds.
  • To significantly improve the mechanical performance of PCL scaffolds through fiber reinforcement.
  • To investigate the effect of a Vacuum Assisted Resin Infusion (VARI) process on fiber orientation and mechanical properties.

Main Methods:

  • Fabrication of PLA/PCL composite filaments using a VARI process, infusing PLA short fiber mats with a PCL matrix.
  • 3D printing of scaffolds using the developed PLA/PCL composite filaments and neat PCL.
  • Characterization of mechanical properties (Young's modulus, peak load, stiffness) of 3D printed strands and scaffolds.

Main Results:

  • The VARI process resulted in highly oriented PLA fibers along the printing direction in the composite filaments.
  • 3D printed strands using VARI-processed filaments showed a 127.6% greater increase in Young's modulus compared to conventional melt blending.
  • PLA/PCL scaffolds (11 wt% PLA) exhibited an 84.2% increase in peak load and 143.3% increase in stiffness versus neat PCL.

Conclusions:

  • The developed PLA/PCL composite filament and VARI process effectively enhance the mechanical performance of 3D printed PCL scaffolds.
  • Fiber orientation achieved through the VARI process is key to the significant mechanical improvements.
  • This approach offers a viable solution for creating robust PCL-based scaffolds for tissue engineering.