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Three-Dimensional Printing of Lignocellulose Structures: Improving Mechanical Properties and Shape Fidelity
Yangxiaozhe Jiang1, Muhammad Latif1, Jaehwan Kim1
1Creative Research Center for Nanocellulose Future Composites, Department of Mechanical Engineering, Inha University, 100, Inha-ro, Michuhol-gu, Incheon 22212, South Korea.
ACS Omega
|June 10, 2024
Summary
Researchers improved 3D printing of nanocellulose (NC) materials by adding lignin (LG). This enhanced structural integrity and mechanical properties for eco-friendly applications.
Area of Science:
- Materials Science
- Additive Manufacturing
- Biomaterials
Background:
- Additive manufacturing enables complex, eco-friendly structures, but nanocellulose (NC) printing faces challenges with high solid content, leading to poor adhesion and low fidelity.
- High cellulose content in NC pastes results in inadequate layer adhesion, limiting shape fidelity and mechanical performance in 3D printed objects.
Purpose of the Study:
- To enhance the layer adhesion and mechanical properties of high-content nanocellulose pastes for 3D printing.
- To investigate the use of lignin as a nanofiller to improve the printability and performance of nanocellulose-based materials.
Main Methods:
- Blending lignin (LG) as a nanofiller into high-content nanocellulose (>25 wt % solid content) paste.
- 3D printing of the optimized lignocellulose (0.5LG-NC) paste.
- Drying under clean room conditions followed by postcuring.
Main Results:
- The optimized 0.5LG-NC paste demonstrated high structural shape fidelity.
- Achieved remarkable flexural strength (102.93 ± 0.96 MPa) and moduli (9.05 ± 0.07 GPa).
- Low standard deviations in volumetric shrinkage confirmed the repeatability of 3D printed structures.
Conclusions:
- Lignin blending effectively improves layer adhesion and mechanical properties of high-content nanocellulose pastes for 3D printing.
- The developed lignocellulose material offers potential for high-performance engineering and biomedical applications.
- This approach enables the manufacture of robust, environment-friendly structures with enhanced performance.
