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<p>Polyhydroxyalkanoates are biologically degradable polymers with potential for additive manufacturing but suffer from a narrow processing window and severe warping. While reinforcements can mitigate warping, synthetic fibers tend to compromise biodegradability. Natural alternatives such as hemp hurd, an abundant agricultural byproduct, can serve as a cost-effective, biologically degradable filler. This study reports the development of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) biocomposites for fused deposition modeling via twin-screw compounding and single-screw production of filaments. The resulting filaments exhibited optimized thermal processing and significantly improved dimensional stability. These findings establish hemp hurd as a viable solution for producing fully biologically degradable, high-performance 3D printing feedstocks.</p> Graphical abstract <p></p>

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Sustainable PHA-based filaments for FDM: Exceptional dimensional stability and reduced warpage

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月15日

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  • Artem Sulimov,
  • Matthew L. Sheahan,
  • M. Taylor Sobczak,
  • Grant H. Crane,
  • Branson W. Ritchie,
  • Kenan Song,
  • Jason Locklin

摘要

Polyhydroxyalkanoates are biologically degradable polymers with potential for additive manufacturing but suffer from a narrow processing window and severe warping. While reinforcements can mitigate warping, synthetic fibers tend to compromise biodegradability. Natural alternatives such as hemp hurd, an abundant agricultural byproduct, can serve as a cost-effective, biologically degradable filler. This study reports the development of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) biocomposites for fused deposition modeling via twin-screw compounding and single-screw production of filaments. The resulting filaments exhibited optimized thermal processing and significantly improved dimensional stability. These findings establish hemp hurd as a viable solution for producing fully biologically degradable, high-performance 3D printing feedstocks.

Graphical abstract