Biobased structural composites made from nanocellulose

J. Kim
Inha University,
Korea

Keywords: natural fiber reinforced polymer composites, nanocellulose, lignin

Summary:

Natural fiber reinforced polymer (NFRP) composites have gained interest over the past decade because of their low material costs, light weight, high specific modulus and environmentally friendly appeal. However, in the NFRP composites, the use of natural fibers is not enough to move the current technological limitations of composites because of their short length and material variability. Nanocellulose is known to have high specific strength and elastic modulus. Young’s modulus of nanocellulose is about 150 GPa and its tensile strength is 1-3 GPa. However, its length is too short to form long-fiber. Recently, CNFs were formed to a long-fiber by means of wet extrusion. Thus, nanocellulose based long-fiber of high elastic modulus should be developed to meet the technological requirement of NFRP composites. This presentation will talk about the story for recently developed nanocellulose based long fiber, which has good mechanical strength as well as toughness. On the other hand, resin for NFRP composites should be also environmentally friendly. Thus, lignin was developed for resins by chemically modifying or blending with other biopolymers. This approach will bring the idea of NFRP composites to real world.