Biomaterial nanocomposite derived from modification of Polylactic Acid (PLA) with Cellulose Nanofibers (CNF)

CARLOS A. RODRIGUEZ RAMIREZ; MARTÍN LUONG; NORMA B. D'ACCORSO; NANCY L. GARCÍA

Bahía Blanca

Workshop; Biopoli 2018. III Workshop de polímeros biodegradables y biocompuestos; 2018

A new bio-material obtained from the chemical modification of a national low molecular weight polylactic acid (LMWPLA) synthesized in our laboratory with Cellulose Nanofibers is presented, using a synthetic route that consists of three reaction stages. This first material will serve as a link for the nanofibers to be compatible with a hydrophobic PLA of high molecular weight (HMWPLA). The modification consists first in the protection of the hydroxyl groups of the LMWPLA through a Benzoylation reaction, the second involves the activation of carboxyl groups with thionyl chloride, in the third stage these latter groups react with the cellulose nanofibers (LMWPLACEL) . Finally, the latter is associated with the HMWPLA via casting and 3D extrusion.