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Title: Spin-coating: a new approach for improving dispersion of cellulose nanocrystals and mechanical properties of poly (lactic acid) composites

Source: Carbohydrate Polymers. 190: 139-147.

Author(s)Shojaeiarani, Jamileh ; Bajwa, Dilpreet S.; Stark, Nicole M.

Publication Year: 2018  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4706-2B

Abstract: This study systematically evaluated the influence of masterbatch preparation techniques, solvent casting and spin-coating methods, on composite properties. Composites were manufactured by combining CNCs masterbatches and PLA resin using twin screw extruder followed by injection molding. Different microscopy techniques were used to investigate the dispersion of CNCs in masterbatches and composites. Thermal, thermomechanical, and mechanical properties of composites were evaluated. Scanning electron microscopy (SEM) images showed superior dispersion of CNCs in spin-coated masterbatches compared to solvent cast masterbatches. At lower CNCs concentrations, both SEM and optical microscope images confirmed more uniform CNCs dispersion in spin-coated composites than solvent cast samples. Degree of crystallinity of PLA exhibited a major enhancement by 147% and 380% in solvent cast and spin-coated composites, respectively. Spin-coated composites with lower CNCs concentration exhibited a noticeable improvement in mechanical properties. However, lower thermal characteristics in spin-coated composites were observed, which could be attributed to the residual solvents in masterbatches.

Keywords: Poly(lactic acid); cellulose nanocrystals; masterbatch; composites; solvent casting; spin-coating

Publication Review Process: Formally Refereed

File size: 2,048 kb(s)

Date posted: 08/31/2018

This publication is also viewable on Treesearch:  view
RITS Product ID: 91569
Current FPL Scientist associated with this product
Stark, Nicole M.
Research Chemical Engineer
  

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