Location: Bioproducts Research
Title: Nanocrystalline cellulose from coir fiber: preparation, properties, and applicationsAuthor
AZEREDO, HENRIETTE - Embrapa | |
IMAM, SYED - Retired ARS Employee | |
FIGUEIREDO, MARIA - Embrapa | |
NASCIMENTO, DIEGO - Embrapa | |
ROSA, MORSYLEIDE - Embrapa |
Submitted to: Book Chapter
Publication Type: Book / Chapter Publication Acceptance Date: 3/2/2014 Publication Date: 6/6/2014 Citation: Azeredo, H.M., Imam, S.H., Figueiredo, M.C., Nascimento, D.M., Rosa, M.F. 2014. Nanocrystalline cellulose from coir fiber: preparation, properties, and applications. In: Pandey, J.K. Takagi, H. Nakagaito, A.N., Kim, H.-J., editors. Handbook of polymer nanocomposites. Processing, performance and application, Volume C: Polymer nanocomposites of cellulose nanoparticles. Berlin Heidelberg, Germany: Springer. p. 15-26. Interpretive Summary: Technical Abstract: Nanocrystalline cellulose derived from various botanical sources offers unique and potentially useful characteristics. In principle, any cellulosic material can be considered as a potential source of a nanocrystalline material, including crops, crop residues, and agroindustrial wastes. Because of the variability in cellulose source and methods of preparation, nanocellulosic materials of variable structure, property, and application could be obtained. This chapter provides current knowledge on the acid hydrolysis extraction of nanocrystalline cellulose from coir fiber and its application in composite films. The use of ultrathin cellulose nanocrystals extracted from bleached coir fibers, in composites, has shown improved filler-matrix interaction and enhanced performance in the resulting nanocomposites, identifying a novel application for this feedstock. When incorporated into a hydrophilic polysaccharide-based matrix, nanostructures from coir fiber exhibited barrier and mechanical properties comparable to that from cotton fiber, despite the expected low compatibility between the matrix and the residual lignin leftover in the coir fiber. This is attributed to the counterbalancing effect of the higher aspect ratios present in nanocellulose obtained from coir fibers. |