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May 25, 2026International Journal of Biological Macromolecules0 citationsOpen Access

Influence of chitin nanocrystal content on intermolecular interactions, crystallinity, and properties of starch–chitosan composite films

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HMHayden McGrealMetropolitan UniversityJPJonghun ParkUniversity of TorontoEBEhsan BehzadfarUniversity of Toronto

Key Points

  • This research aims to explore how chitin nanocrystal content affects the properties of starch-chitosan composite films.
  • Analyzed intermolecular interactions using FTIR to observe hydrogen bonding networks.
  • Assessed crystallinity through XRD to understand crystallinity recovery mechanisms.
  • Evaluated mechanical properties, including tensile strength and barrier properties, at various ChNC concentrations.
  • At 2.5 wt% ChNCs, optimal tensile strength was approximately 36 MPa.
  • FTIR analysis revealed enhanced interpolymer hydrogen bonding due to ChNCs.
  • XRD results indicated partial recovery of crystallinity attributed to ChNC nucleation effects.

Abstract

• First study of ChNCs in a ternary starch–chitosan polysaccharide system • FTIR reveals ChNC-mediated interpolymer hydrogen bonding networks. • XRD indicates partial crystallinity recovery via ChNC nucleation effects. • Optimal tensile strength (~36 MPa) and barrier properties at 2.5 wt% ChNCs • ChNCs actively mediate polysaccharide chain organization beyond inert filling.

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Cite This Study

McGreal et al. (2026) studied this question.

synapsesocial.com/papers/6a13e7a80e02ee3982d32540https://doi.org/10.1016/j.ijbiomac.2026.152664
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