Polymer Bulletin

, Volume 76, Issue 3, pp 1257–1275 | Cite as

Mechanical properties of green canola meal composites and reinforcement with cellulose fibers

  • Shuzhao Li
  • Brianna Ball
  • Elizabeth Donner
  • Michael R. Thompson
  • Curtis Rempel
  • Qiang LiuEmail author
Original Paper


Samples of canola meal (CM), a by-product of canola oil extraction, with different particle sizes and canola protein (CP) content were obtained by ball milling followed by air classification. In an effort to produce highly deformable “green” biodegradable materials, these CM samples were used to prepare CM bioplastics and their mechanical properties were characterized and compared. It was found that greater CP content led to an increase in elongation at break and a decrease in tensile strength; however, particle size of CM had no apparent impact on the tensile properties. Considering its high mechanical properties and miscibility with the CM matrix, cellulose fiber (CF) was added to the composite formulation to fabricate samples with enhanced tensile strength. The effects of fiber loading on mechanical and thermal properties were characterized using tensile testing and dynamic mechanical analysis. Marked improvements in tensile strength and modulus were found with increasing fiber content above 5 wt%, while mechanical properties were constant between fiber contents of 1–5 wt% because of the inefficient packing of the CF, indicating that the fiber content of 5 wt% is a percolation threshold to increase the mechanical property of the CM composite. The DMA results illustrate that the addition of fiber produced an increase in storage modulus and decreased damping factors for the composites with > 5 wt% CF, reflecting strong interfacial adhesion between CM and CF which resulted in a decrease in chain mobility.


Canola meal Biodegradable composite Mechanical property Thermal property Extrusion processing 



We thank the Canola Council of Canada and Agriculture and Agri-Food Canada through Growing Forward 2 Canola/Flax Science Cluster Programs for financial funding.


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Copyright information

© Crown 2018

Authors and Affiliations

  • Shuzhao Li
    • 1
  • Brianna Ball
    • 1
  • Elizabeth Donner
    • 1
  • Michael R. Thompson
    • 2
  • Curtis Rempel
    • 3
  • Qiang Liu
    • 1
    Email author
  1. 1.Guelph Research and Development CentreAgriculture and Agri-Food CanadaGuelphCanada
  2. 2.Department of Chemical EngineeringMcMaster UniversityHamiltonCanada
  3. 3.Canola Council of CanadaWinnipegCanada

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