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Melt Spinning of Cellulose Nanofibril/Polylactic Acid (CNF/PLA) Composite Fibers For High Stiffness AITranslate

Caitlyn M. Clarkson; Sami M. El Awad Azrak; Reaz Chowdhury; Shoumya Nandy Shuvo; James Snyder; Gregory Schueneman; Volkan Ortalan; Jeffrey P. Youngblood;
Purdue University; Purdue University; Purdue University; Purdue University;Army Research Laboratory;Forest Products Laboratory; Purdue University; Purdue University
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Publisher: ACS
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Abstract AITranslate

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 nanoparticle thermal stability, and increase CNF dispersion 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 AITranslate

polylactic acid processing meltspinning nanocellulose CNF nanocomposites
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Basic Information:

DOI：https://doi.org/10.1021/acsapm.8b00030

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Citation Information:

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 nanoparticle thermal stability, and increase CNF dispersion 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.

quote

GB/T 7714-2015 [1] Caitlyn M. Clarkson, Sami M. El Awad Azrak, Reaz Chowdhury, et al. ACS Applied Polymer Materials, 2019(1). DOI:10.1021/acsapm.8b00030.
MLA [1] Caitlyn M. Clarkson, et al., ACS Applied Polymer Materials, no. 1, 2019, https://doi.org/10.1021/acsapm.8b00030.
APA [1] Caitlyn M. Clarkson, Sami M. El Awad Azrak, Reaz Chowdhury, Shoumya Nandy Shuvo, James Snyder, Gregory Schueneman, Volkan Ortalan, & Jeffrey P. Youngblood. (2019). ACS Applied Polymer Materials(1). https://doi.org/10.1021/acsapm.8b00030
IEEE [1] Caitlyn M. Clarkson, Sami M. El Awad Azrak, Reaz Chowdhury, Shoumya Nandy Shuvo, James Snyder, Gregory Schueneman, Volkan Ortalan, and Jeffrey P. Youngblood, ACS Applied Polymer Materials, no. 1, 2019, doi: 10.1021/acsapm.8b00030. keywords: {polylactic acid;processing;meltspinning;nanocellulose;CNF;nanocomposites}