Interphase Design of Cellulose Nanocrystals/Poly(hydroxybutyrate- ran-valerate) Bionanocomposites for Mechanical and Thermal Properties Tuning
Journal article, 2020

Poly[(3-hydroxybutyrate)-ran-(3-hydroxyvalerate)] (PHBV) is a bacterial polyester with a strong potential as a substitute for oil-based thermoplastics due to its biodegradability and renewability. However, its inherent slow crystallization rate limits its thermomechanical properties and therefore its applications. In this work, surface-modified cellulose nanocrystals (CNCs) have been investigated as green and biosourced nucleating and reinforcing agent for PHBV matrix. Different ester moieties from the CNCs were thereby produced through a green one-pot hydrolysis/Fisher esterification. Beyond the improved dispersion, the CNCs surface esterification affected the thermal and thermomechanical properties of PHBV. The results demonstrate that butyrate-modified CNCs, mimicking the PHBV chemical structure, brought a considerable improvement toward the CNCs/matrix interface, leading to an enhancement of the PHBV thermomechanical properties via a more efficient stress transfer, especially above its glass transition.


Chiara Magnani

Université de Mons

Alexander Idström

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Lars Nordstierna Group

Lars Nordstierna

Royal Institute of Technology (KTH)

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Lars Nordstierna Group

Alejandro J. Müller

Institute for Polymer Materials, San Sebastian

Basque Foundation for Science (Ikerbasque)

Philippe Dubois

Université de Mons

Jean Marie Raquez

Université de Mons

Giada Lo Re

Chalmers, Industrial and Materials Science, Engineering Materials


1525-7797 (ISSN) 1526-4602 (eISSN)

Vol. 21 5 1892-1901

Subject Categories

Bio Materials

Polymer Technologies





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7/3/2020 1