effects of process conditions and the addition of TEMPO-oxidized nanocellulose
Eija-Katriina Uusi-Tarkka (Avtor), Jaka Levanič (Avtor), Henrik Heräjärvi (Avtor), Nawar Kadi (Avtor), Mikael Skrifvars (Avtor), Antti Haapala (Avtor)

Povzetek

All-cellulose composites (ACCs) are manufactured using only cellulose as a raw material. Biobased materials are more sustainable alternatives to the petroleum-based composites that are used in many technical and life-science applications. In this study, an aquatic NaOH-urea solvent system was used to produce sustainable ACCs from wood-based woven textiles with and without the addition of TEMPO-oxidized nanocellulose (at 1 wt.-%). This study investigated the effects of dissolution time, temperature during hot press, and the addition of TEMPO-oxidized nanocellulose on the mechanical and thermal properties of the composites. The results showed a significant change in the tensile properties of the layered textile composite at dissolution times of 30 s and 1 min, while ACC elongation was the highest after 2 and 5 min. Changes in hot press temperature from 70 °C to 150 °C had a significant effect: with an increase in hot press temperature, the tensile strength increased and the elongation at break decreased. Incorporating TEMPO-oxidized nanocellulose into the interface of textile layers before partial dissolution improved tensile strength and, even more markedly, the elongation at break. According to thermal analyses, textile-based ACCs have a higher storage modulus (0.6 GPa) and thermal stabilization than ACCs with nanocellulose additives. This study highlights the important roles of process conditions and raw material characteristics on the structure and properties of ACCs.

Ključne besede

lesna vlakna;biokompoziti;NaOH-Urea topilo;TEMPO-oksidirana nanoceluloza;biocomposite;NaOH-urea;solvent system;TEMPO-oxidized nanocellulose;wood fiber;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL BF - Biotehniška fakulteta
UDK: 630*8
COBISS: 123086083 Povezava se bo odprla v novem oknu
ISSN: 2073-4360
Št. ogledov: 802
Št. prenosov: 67
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: lesna vlakna;biokompoziti;NaOH-urea topilo;TEMPO-oksidirana nanoceluloza;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 3959-1-3959-17
Letnik: ǂVol. ǂ14
Zvezek: ǂno. ǂ19
Čas izdaje: 2022
DOI: 10.3390/polym14193959
ID: 16643701