Leftover Biomass Lignin for 3D Printing

Date:December 21, 2018

Application

• Produces renewable, biodegradable materials for 3D printing, specifically for the fabrication of soft materials with complex shapes and precise dimensions.

Description

Researchers at Oak Ridge National Laboratory have developed a new technique for 3D printing feedstock using lignin, a plant cell wall polymer, combined with nylon and carbon fiber. This composite material has improved mechanical properties, reduced viscosity, and increased stiffness, making it suitable for 3D printing. The addition of lignin, which is typically a waste product of biomass processing, could provide a new revenue stream and enable the production of renewable, biodegradable materials.

Pathway Description:

The researchers combined the melt-stable hardwood lignin with a low-melting nylon and carbon fiber to yield a composite with specific characteristics for extrusion and weld strength between layers during the printing process and excellent mechanical properties.