Homogeneous acylation of Cellulose diacetate: Towards bioplastics with tuneable thermal and water transport properties

Abstract : In this study, we report a simple, non-degrading and efficient homogeneous acylation of cellulose diacetate (CDA) by using a large panel of commercially available acylating aliphatic moieties, differing in their structure (fatty, ramified, bulky, cycloaliphatic, aromatic, more or less spaced from the cellulose backbone), in view of generating a library of well-defined cellulose mixed esters with enhanced thermoplasticity. As reflected by a lowering of the glass temperature (Tg), the covalent grafting confers an improved mobility to the cellulose chains, by disrupting the initial H-bonds. In particular, it appears that the gain in free volume is tailored by the substituent structure and that acylating reagents consisting in a terminal bulky moieties spaced from CDA chains by a linear chain efficiently separate macromolecular chains without generating detrimental stiffening interactions (low Tg around 125 °C). Moreover, free-standing films easily prepared by solvent casting exhibit relevant water transport properties, which are closely dictated and tuned by the water solubility of the cellulose mixed ester.
Document type :
Journal articles
Complete list of metadatas

https://hal-univ-lyon1.archives-ouvertes.fr/hal-02187812
Contributor : Laure-Hélène Davoine <>
Submitted on : Thursday, July 18, 2019 - 10:30:09 AM
Last modification on : Tuesday, July 23, 2019 - 10:14:08 AM

Identifiers

Collections

Citation

Manon Boulven, Guilhem Quintard, Amandine Cottaz, Catherine Joly, Aurélia Charlot, et al.. Homogeneous acylation of Cellulose diacetate: Towards bioplastics with tuneable thermal and water transport properties. Carbohydrate Polymers, 2019, 206, pp.674-684. ⟨10.1016/j.carbpol.2018.11.030⟩. ⟨hal-02187812⟩

Share

Metrics

Record views

6