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Related Concept Videos

Wood Products01:21

Wood Products

215
Wood products encompass a broad range of materials crafted from wood strands, veneers, lumber, and even waste wood-like shreds, designed for both structural and nonstructural purposes. Various specialized wood products have been developed to enhance strength, durability, and versatility in building applications.
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
215

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Related Experiment Video

Updated: Dec 10, 2025

Fabrication and Design of Wood-Based High-Performance Composites
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Additive Manufacturing of Prostheses Using Forest-Based Composites.

Erik Stenvall1, Göran Flodberg2, Henrik Pettersson2

  • 1Stora Enso AB, Sommargatan 101A, 65009 Karlstad, Sweden.

Bioengineering (Basel, Switzerland)
|September 5, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel biocomposite for custom transtibial prostheses using forestry-derived microfibrillated cellulose (MFC) and polypropylene (PP). This sustainable material significantly improved mechanical strength, enabling successful 3D-printed prosthetic applications.

Keywords:
additive manufacturingartificial limbbiocompositefibrilsforest-based MFCfused deposition modeling (FDM)

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Area of Science:

  • Biomaterials Engineering
  • Additive Manufacturing
  • Prosthetics and Orthotics

Background:

  • Fossil-based thermoplastics dominate prosthetic manufacturing, driving demand for sustainable alternatives.
  • Transtibial prostheses require high mechanical strength, durability, and reliability, influenced by material choice and manufacturing processes.

Purpose of the Study:

  • To develop sustainable biocomposites using forestry derivatives and additive manufacturing (AM) for prosthetic applications.
  • To investigate the mechanical properties of polypropylene (PP) reinforced with microfibrillated cellulose (MFC).
  • To create and clinically evaluate a 3D-printed transtibial prosthesis using the developed biocomposite.

Main Methods:

  • Developed composite materials of PP reinforced with varying weight percentages (20-40 wt%) of MFC.
  • Characterized mechanical performance, including tensile strength and Young's modulus, via injection molding.
  • Utilized fused deposition modeling (FDM) for AM of a transtibial prosthesis based on patient data.
  • Conducted a clinical trial to assess the prosthesis's performance and user acceptance.

Main Results:

  • MFC addition significantly enhanced the mechanical properties of PP composites.
  • A 30 wt% MFC composite exhibited approximately double the tensile strength and Young's modulus of pure PP.
  • The 3D-printed prosthesis demonstrated successful clinical outcomes regarding wearability, aesthetics, and material acceptance.

Conclusions:

  • The developed MFC-reinforced PP biocomposite offers a promising sustainable material for 3D-printed transtibial prostheses.
  • AM techniques like FDM are viable for fabricating custom prosthetics from advanced biocomposites.
  • Further optimization of AM processes is necessary to enhance inter-layer adhesion and maximize MFC reinforcement benefits.