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Title: An experimental study on crack propagation in green composites made from cellulose nanofibers and epoxy

Source: SAMPE 2011 [electronic resource] : May 23-26, 2011, Long Beach, CA. [Covina, CA] : Society for the Advancement of Material and Process Engineering, c2011: 8 p.

Author(s)Masoodi, R.; Hajjar, R.E.; Pillai, K.M.; Sabo, Ronald

Publication Year: 2011  View PDF »

Category: Conference Proceedings
Associated Research Project(s):   FPL-4706-1A

Abstract: The current examples of natural-fiber based polymer composites, because of their biobased and biodegradable properties, offer an alternative as a ‘green’ material available for automotive and other engineering applications. However such composites suffer from low strength and fatigue properties compared to the carbon- or glass-fiber based polymer composites. Cellulose nanofibers (CNFs), a new type of nanofibers made entirely from cellulose molecules, have very high mechanical properties compared to other natural fibers, even approaching that of inorganic reinforcing fibers. The composites made from cellulose nanofiber films are likely to have very good strength compared to other kinds of biocomposites. However such an assertion about the mechanical properties of composites made from CNF films is yet to be investigated through experiments. This paper presents the results from a crack-propagation test conducted using a double cantilever beam made using two types of resins and reinforcements. The resins used were a traditional epoxy and a bio-based epoxy. For reinforcement, cellulose nanofiber (CNF) films were used. The samples were tested against a reference case made from fiberglass to study and compare crack propagation patterns in the composites. Various crack resistance characteristics are observed in the two systems. The study shows the need to investigate methods for improving the fracture toughness of polymer composites fabricated using CNF films.

Keywords: Nanofibers; cellulose; nanotechnology; cellulose fibers; composite materials; cracking; nanocomposites; mechanical properties; nanostructured materials; epoxy resins; fatigue; thin films; fracture mechanics; green products; green technology; nanocellulose; cellulose nanofibers; biocomposites; strength; crack propagation; double cantilever beam tests; polymers; polymerization

Publication Review Process: Non-Refereed (Other)

File size: 483 kb(s)

Date posted: 09/27/2011
RITS Product ID: 40102
Current FPL Scientist associated with this product
Sabo, Ronald C.
Research Materials Engineer

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