Potential for Natural Fiber Reinforcement in PLA Polymer Filaments for FDM Additive Manufacturing
Abstract
This comprehensive review examines natural fiber reinforcement potential in PLA filaments for FDM 3D printing, with particular focus on kenaf fiber composites. Natural fibers offer advantages over synthetic alternatives including renewable sourcing, high specific strength and modulus, low cost, light weight, and biodegradability. The review covers fiber types (kenaf, jute, hemp, flax), processing methods, surface treatments, and mechanical property enhancements achievable through proper composite formulation.
Summary
This review paper is essential reading for anyone interested in eco-friendly 3D printing composites. Key findings relevant to hobbyists and maker spaces:
Natural Fiber Advantages
- Renewable, biodegradable resources
- Low cost compared to carbon/glass fiber
- Comparable specific strength for many applications
- Reduced environmental impact vs synthetic fibers
Fiber Types Explored
- Kenaf fiber (highlighted as particularly promising)
- Jute, hemp, flax fibers
- Various agricultural waste fibers
Processing Considerations
- Surface treatment (typically alkali/NaOH) improves fiber-matrix bonding
- Treated fibers can enhance tensile strength by 25% and interlayer adhesion by 18%
- Moisture content must be controlled during processing
- Fiber length and distribution affect printability
Practical Implications
- Natural fiber filaments are increasingly available commercially
- DIY filament makers can incorporate locally-sourced natural fibers
- Print settings may need adjustment for fiber-filled materials
- Lower nozzle diameter may cause clogging with longer fibers
This is highly relevant for sustainable prototyping and eco-conscious making.