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Updated: Oct 16, 2025

Analysis and Specification of Starch Granule Size Distributions
Published on: March 4, 2021
Influence of native starch's properties on starch nanocrystals thermal properties
Déborah LeCorre1, Julien Bras1, Alain Dufresne1
1The International School of Paper, Print Media and Biomaterials (Pagora), Grenoble Institute of Technology, BP 65 - F-38402 Saint Martin d'Hères Cedex, France.
Abstract:
Starch nanocrystals (SNC) are crystalline square-like platelet about 10nm thick and 50-100nm equivalent diameters. Depending on the botanic origin of starch these platelets show different features. The aim of the present study was (i) to assess the thermal stability of SNC in different processing conditions (i.e., excess water and dry) and (ii) to investigate the potential influence of botanic origin on thermal stability. The thermal properties of five types of starches (waxy maize, normal maize, high amylose maize, potato and wheat) and their corresponding SNC were characterized by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). SNC revealed two endothermic transitions. No correlation between melting temperature and botanic origin was found. However, a review of starch thermal properties allowed to postulate for the mechanism involved in SNC thermal transitions. It was also found that SNC can be used in wet processes below 100°C and in dry processes below 150-200°C to avoid melting.
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