Interphase Design of Cellulose Nanocrystals/Poly(hydroxybutyrate- ran-valerate) Bionanocomposites for Mechanical and Thermal Properties Tuning
Artikel i vetenskaplig tidskrift, 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.

Författare

Chiara Magnani

Université de Mons

Alexander Idström

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Lars Nordstierna Group

Lars Nordstierna

Kungliga Tekniska Högskolan (KTH)

Chalmers, Kemi och kemiteknik, Tillämpad kemi, 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, Industri- och materialvetenskap, Konstruktionsmaterial

Biomacromolecules

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

Vol. 21 5 1892-1901

Ämneskategorier

Biomaterial

Polymerteknologi

DOI

10.1021/acs.biomac.9b01760

PubMed

32078304

Mer information

Senast uppdaterat

2020-07-03