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Title: Melt spinning of cellulose nanofibril/polylactic acid (CNF/PLA) composite fibers for high stiffness

Source: ACS Applied Polymer Materials. 1(2): 160-168.

Author(s)Clarkson, Caitlyn M.; El Awad Azrak, Sami M.; Chowdhury, Reaz ; Shuvo, Shoumya Nandy; Snyder, James ; Schueneman, Gregory ; Ortalan, Volkan ; Youngblood, Jeffrey P.

Publication Year: 2019  View PDF »

Category: Journal Articles

Abstract: Nanocellulose has potential as a reinforcing agent to improve stiffness and strength in polymer fiber; however, the inherent difference in hydrophilicity makes it challenging to incorporate it into nonhydrophilic polymers, and the composite properties are strongly anisotropic. In the present work, a dual approach was employed to incorporate cellulose nanofibrils (CNFs) into polylactic acid (PLA). Polyethylene glycol (PEG) acted as a compatibilizating agent to enable the melt spinning of CNF/PLA composite fibers without water/solvent, and CNFs were surface modified to improve compatibility, increase nano- particle thermal stability,and increase CNFdispersion in PLA.While no significant difference was observed in strength,the stiffness improved up to 600% (1.3 wt % CNF, maximum draw) in the composite fibers. This improvement was correlated with the crystallinity and fiber orientation (Herman’s order parameter) for as-spun and hot-drawn fibers.

Keywords: Polylactic acid; processing; melt spinning; nanocellulose; CNF; nanocomposites

Publication Review Process: Formally Refereed

File size: 3,072 kb(s)

Date posted: 08/27/2019

This publication is also viewable on Treesearch:  view
RITS Product ID: 94763
Current FPL Scientist associated with this product
Schueneman, Gregory
Supervisory Research Materials Engineer
  

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