Banner for LabNotes
From Lab Notes
Contact Information
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592


You are here: FPL Home  / Information Products & Services  / Publications

Requested Product

Title: Rheological properties of cellulose nanocrystals engineered polylactic acid nanocomposites

Source: Composites Part B: Engineering. 161: 483-489.

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

Publication Year: 2019  View PDF »

Category: Journal Articles

Abstract: Ecofriendly materials such as polylactic acid (PLA) and cellulose nanocrystals (CNCs) are widely sought as potential substitute for petrochemical-based plastics. Uniform dispersion of cellulose nanocrystals in polymer matrices has inhibited their wide-spread application. In this study the influence of masterbatch preparation techniques on molecular structure, melt strength, rheological and dynamic mechanical properties of nanocomposite were systematically analyzed. Film casting and spin-coating methods were used to prepare masterbatches. Nanocomposites were obtained by masterbatch dilution via melt compounding followed by injection molding process. The higher molecular weight and lower molecular number were observed in spin-coated samples in comparison with film cast nanocomposites. The spin-coated nanocomposites exhibited higher storage modulus than film cast samples in the glassy state. However, tan δ curves exhibited higher peak va ue in spincoated nanocomposites, which were in good agreement with higher dispersity index of spin-coated samples. The complex viscosity of PLA and nanocomposites exhibited non-Newtonian behavior at a low shear rate, followed by shear thinning phenomenon. The spin-coated nanocomposites demonstrated higher complex viscosity than film cast samples, which was attributed to higher molecular weight in spin-coated samples. The shear-thinning tendency in spin-coated samples was higher than film cast nanocomposites.

Keywords: Poly (lactic acid); cellulose nanocrystals; masterbatch; molecular structure; rheological properties; thermal stability

Publication Review Process: Formally Refereed

File size: 1,024 kb(s)

Date posted: 12/20/2019

This publication is also viewable on Treesearch:  view
RITS Product ID: 96767
Current FPL Scientist associated with this product
Stark, Nicole M.
Research Chemical Engineer

Additional items that might interest you
View the video celebrating FPL's 100 years of public service in 2010, from the producers of the Greatest Good....view

Research Highlights from FPL....view

Termite Eradication: A search for the Holy Grail.... view

Moisture Management in Residential Construction Series videos...view

Wood Floor Systems in Residential Construction Series videos....view
- FPL's Mission and Strategic Plan -

FPL's mission is to identify and conduct innovative wood and fiber utilization research that contributes to conservation and productivity of the forest resource, thereby sustaining forests, the economy, and quality of life. ... ..more »

- FPL Research Emphasis Areas -
Advanced Composites

As an integral part of the FPL mission, we improve the long-term sustainability of our Nation's forests by creating valuable composite products from biobased materials ... ..more »

Advanced Structures

The FPL has been in the forefront of wood-frame housing research since 1910 and has long been recognized as a world leader in such housing-related areas as engineered wood ... ..more »

Forest Biorefinery

We all know the compelling reasons that the United States needs to reduce its dependence on fossil fuels. Historically, the greatest increases in energy demand have been for transportation fuels ... ..more »


A leader in wood products research for over a century, the FPL is positioning itself to become the lead Federal research facility for the application of nanotechnology in forest products ... more »

Woody Biomass Utilization

Forests in the United States contain a substantial amount of small-diameter, overstocked, and underutilized material.FPL research projects are exploring the potential of the small-diameter ... ..more »