McGill Alert / Alerte de McGill

Updated: Thu, 07/18/2024 - 18:12

Gradual reopening continues on downtown campus. See Campus Public Safety website for details.

La réouverture graduelle du campus du centre-ville se poursuit. Complément d'information : Direction de la protection et de la prévention.

Composites

Cellulose based composite materials

Salman Safari and Theo van de Ven

Polyhydroxybutyrate (PHB) is a hydrophobic, biodegradable biopolymer, which can be a potential substitute for currently used synthesized polymers in the packaging industry. However, its utility is often limited by its brittleness and poor mechanical properties, mainly because of its through-thickness fractures. In this study, we laminate and crystallize PHB on glassine paper, a super-calendared paper, by hot-pressing and tune the crystallization conditions to change the PHB spherulites morphology and minimize cracking. The fabricated two-layer glassine/PHB films have mechanical strength and Young’s modulus of 80 MPa and 2.5 GPa, respectively, and a water vapor transmission rate of 20 g/(m2 day). Our results suggest a simple and cost-effective method to produce PHB films with enhanced mechanical and water vapor barrier properties.

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