Julija Volmajer Valh (Avtor), Dimitrije Stopar (Avtor), Ignacio Selaya Berodia (Avtor), Alen Erjavec (Avtor), Olivera Šauperl (Avtor), Lidija Fras Zemljič (Avtor)

Povzetek

Since millions of tons of packaging material cannot be recycled in conventional ways, most of it ends up in landfills or even dumped into the natural environment. The researched methods of chemical depolymerization therefore open a new perspective for the recycling of various PET materials, which are especially important for packaging. Food preservative packaging materials made from PET plastics are complex, and their wastes are often contaminated, so there are no sophisticated solutions for them in the recycling industry. After integrating the biopolymer chitosan, which is derived from natural chitin, as an active surface additive in PET materials, we discovered that it not only enriches the packaging material as a microbial inhibitor to reduce the bacteria Staphylococcus aureus and Escherichia coli, thus extending the shelf life of the contained food, but also enables economical chemical recycling by alkaline or neutral hydrolysis, which is an environmentally friendly process. Alkaline hydrolysis at a high temperature and pressure completely depolymerizes chitosan-coated PET packaging materials into pure terephthalic acid and charcoal. The products were characterized by Fourier-transform infrared spectroscopy, proton nuclear magnetic resonance spectroscopy, and elemental analysis. The resulting reusable material represents raw materials in chemical, plastic, textile, and other industries, in addition to the antimicrobial function and recyclability itself.

Ključne besede

hitozan;aktivna embalaža;recikliranje;ponovna uporaba;chitosan;active packaging;PET;recycling;reusability;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UM FS - Fakulteta za strojništvo
Založnik: MDPI AG
UDK: 678:577
COBISS: 119122947 Povezava se bo odprla v novem oknu
ISSN: 2073-4360
Št. ogledov: 0
Št. prenosov: 5
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: hitozan;aktivna embalaža;recikliranje;ponovna uporaba;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 1-15
Letnik: ǂVol. ǂ14
Zvezek: ǂiss. ǂ16 (3244)
Čas izdaje: Aug. 2022
DOI: 10.3390/polym14163244
ID: 26112816
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