Lignin: A multi-faceted role/function in 3D printing inks

Jian Yang ¹, Xingye An ¹, Bin Lu ²

⁰Tianjin Key Laboratory of Pulp and Paper, State Key Laboratory of Food Nutrition and Safety, State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin University of Science and Technology, No. 29, 13th Street, TEDA, Tianjin 300457, PR China; Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.

International Journal of Biological Macromolecules +

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April 7, 2024

View abstract on PubMed

Summary

Lignin, a renewable biomass, can replace fossil fuels in 3D printing inks. This review explores lignin

Area Of Science

Biomaterials Engineering
Sustainable Manufacturing
Polymer Science

Background

3D printing faces environmental challenges due to fossil-derived inks.
Lignin, abundant and renewable, offers eco-friendly alternatives.
Lignin's properties (functional groups, aromatic structure, thermoplasticity) suit printable ink formulation.

Purpose Of The Study

To review lignin's use in 3D printing inks (≥50 wt%) for photo-curing (SLA/DLP) and extrusion (DIW/FDM) technologies.
To explore lignin's role as a functional additive in 3D printing inks.
To evaluate lignin's impact on ink and printed object properties.

Main Methods

Comprehensive literature review on lignin-based 3D printing inks.
Analysis of lignin modification and its role in ink formulation.
Evaluation of lignin's influence on rheological, mechanical, and printability properties.

Main Results

Lignin can be the primary component (≥50 wt%) in printable inks for various 3D printing methods.
Lignin acts as a versatile additive, enhancing ink properties.
Lignin incorporation affects the rheology, printability, and final properties of 3D printed objects.

Conclusions

Lignin is a viable, sustainable feedstock for advanced 3D printing applications.
Further research can optimize lignin-based inks for high-value products.
Overcoming challenges in lignin processing can unlock its full potential in additive manufacturing.

Keywords:

3D printing Future perspectives Lignin Multi-faceted roles/functions