RT info:eu-repo/semantics/article
T1 Effect of graphene oxide on the properties of poly (3-hydroxybutyrate-co-3-hydroxyhexanoate)
A1 Díez Pascual, Ana María
K1 Graphene oxide
K1 Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)
K1 Barrier properties
K1 Mechanical properties
K1 Nanocomposites
K1 Food packaging
K1 Química
K1 Chemistry
AB The main shortcomings of polyhydroxybutyrate (PHB), which is a biodegradable and biocompatible polymer used for biomedical and food packaging applications, areits low thermal stability, poor impact resistance and lack of antibacterialactivity. This issue can be improved by blending with other biodegradablepolymers such as polyhydroxyhexanoate to formpoly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx), which is a copolymerwith better impact strength and lower melting point. However, PHBHHx shows reducedstiffness than PHB and poorer barrier properties against moisture and gases,which is a drawback for use in the food industry. In this regard, novelbiodegradable PHBHHx/graphene oxide (GO) nanocomposites have been prepared viaa simple, cheap and environmentally friendly solvent casting method to enhancethe mechanical properties and antimicrobial activity. The morphology,mechanical, thermal, barrier and antibacterial properties of the nanocompositeswere assessed via several characterization methods to show the enhancement inthe biopolymer properties. The stiffness and strength of the biopolymer wereenhanced up to 40% and 28%, respectively, related to the strongmatrix-nanofiller interfacial adhesion attained via hydrogen bondinginteractions. Moreover, the nanocomposites showed superior thermal stability(as far as 40 degrees C), lower water uptake (up to 70%) and better gas andvapour barrier properties (about 45 and 35% reduction) than neat PHBHHx. Theyalso displayed strong biocide action against Gram positive and Gram negativebacteria. These bio-based nanocomposites with antimicrobial activity offer newperspectives for the replacement of traditional petroleum-based syntheticpolymers currently used for food packaging.
SN 2073-4360
YR 2021
FD 2021-07-07
LK http://hdl.handle.net/10017/49657
UL http://hdl.handle.net/10017/49657
LA eng
NO Comunidad de Madrid
DS MINDS@UW
RD 24-abr-2024