Waste and Biomass Valorization

, Volume 10, Issue 11, pp 3197–3211 | Cite as

Preparation of Square-Shaped Starch Nanocrystals/Polylactic Acid Based Bio-nanocomposites: Morphological, Structural, Thermal and Rheological Properties

  • Pooja Takkalkar
  • Mahalaxmi Ganapathi
  • Chaitali Dekiwadia
  • Sabzoi Nizamuddin
  • Gregory Griffin
  • Nhol KaoEmail author
Original Paper


The development of low-cost bio-nanocomposites based on square-shaped starch nanocrystals (SNCs) is a promising approach for maintaining environmental sustainability. This study reports on a method for the preparation of bio-nanocomposites from polylactic acid (PLA) and SNC derived from acid hydrolysis of waxy maize starch. PLA–SNC bio-nanocomposites were prepared by incorporating SNC at 1, 3 and 5 wt% by dispersing them in PLA matrix using dichloromethane as a solvent. Morphological, thermal, crystalline and rheological properties of neat PLA, neat SNC and PLA–SNC bio-nanocomposites have been investigated to observe the effect of SNC loading. SNC loading at 3 wt% was found to be the optimum loading to improve the storage modulus, complex dynamic viscosity, and crystallinity, while 5 wt% loading caused agglomerations which led to a decrease in the above properties. Thermogravimetric analysis result suggested that both the SNC and PLA–SNC bio-nanocomposites were thermally stable from 25 to 240 °C. Electron microscopy study showed the effective dispersion of SNC in PLA.


Starch nanocrystals Polylactic acid Bio-nanocomposites Rheology Thermal properties 

Supplementary material

12649_2018_372_MOESM1_ESM.docx (79 kb)
Supplementary material 1 (DOCX 79 KB)


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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  • Pooja Takkalkar
    • 1
  • Mahalaxmi Ganapathi
    • 1
  • Chaitali Dekiwadia
    • 1
  • Sabzoi Nizamuddin
    • 1
  • Gregory Griffin
    • 1
  • Nhol Kao
    • 1
    Email author
  1. 1.Department of Chemical Engineering, School of EngineeringRMIT UniversityMelbourneAustralia

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