TY - JOUR
T1 - Bionanocomposites of chitosan reinforced with nanocellulose from giant reed residues: Development and physical characterization
AU - Pires, João R. A.
AU - Souza, Victor G. L.
AU - Kougkolos, Georgios
AU - Godinho, Maria Helena
AU - Coelhoso, Isabel Maria
AU - Fernando, Ana Luísa
N1 - SFRH/BD/144346/2019
UIDB/04077/2020
Sem PDF conforme despacho.
PY - 2020
Y1 - 2020
N2 - Bioplastics are considered a viable alternative and an option to reduce the high levels of pollution associated with synthetic plastics. However, some inherent physical failures need to be surpassed. One of the strategies adopted to improve the flaws presented by biopolymers is their reinforcement with nanoparticles. Incorporating crystalline nanocellulose (CNCs) as reinforcement in bioplastics perfectly fits in the scope of biodegradability and lignocellulosic residues valorization. Thus, the aim of this work was to achieve a biodegradable bionanocomposite made from chitosan, a bio-based polymeric matrix, reinforced with CNC extracted from giant reed (Arundo donax L.) lignocellulosic residues. The nanocellulose from giant reed (2.5% and 5% w/w in chitosan) was added and an exfoliation process was performed. Biofilms with commercial nanocellulose (2.5% and 5% w/w in chitosan) and films without nanocellulose were also produced for comparison. The novel chitosan/nanocellulose bionanocomposites were produced with success by casting method and characterized in terms of their physical properties. The results indicate that the incorporation of nanocrystalline cellulose improved the mechanical properties as intended. Additionally, bionanocomposites are slightly more saturated and showed greater ultraviolet light block than the pristine chitosan films. Hence, bionanocomposites showed greater potential than pristine chitosan biofilm.
AB - Bioplastics are considered a viable alternative and an option to reduce the high levels of pollution associated with synthetic plastics. However, some inherent physical failures need to be surpassed. One of the strategies adopted to improve the flaws presented by biopolymers is their reinforcement with nanoparticles. Incorporating crystalline nanocellulose (CNCs) as reinforcement in bioplastics perfectly fits in the scope of biodegradability and lignocellulosic residues valorization. Thus, the aim of this work was to achieve a biodegradable bionanocomposite made from chitosan, a bio-based polymeric matrix, reinforced with CNC extracted from giant reed (Arundo donax L.) lignocellulosic residues. The nanocellulose from giant reed (2.5% and 5% w/w in chitosan) was added and an exfoliation process was performed. Biofilms with commercial nanocellulose (2.5% and 5% w/w in chitosan) and films without nanocellulose were also produced for comparison. The novel chitosan/nanocellulose bionanocomposites were produced with success by casting method and characterized in terms of their physical properties. The results indicate that the incorporation of nanocrystalline cellulose improved the mechanical properties as intended. Additionally, bionanocomposites are slightly more saturated and showed greater ultraviolet light block than the pristine chitosan films. Hence, bionanocomposites showed greater potential than pristine chitosan biofilm.
KW - Biomass feedstock
KW - Bioplastics
KW - Lignocellulosic sources
UR - http://www.scopus.com/inward/record.url?scp=85097436610&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85097436610
SN - 2282-5819
SP - 672
EP - 678
JO - European Biomass Conference and Exhibition Proceedings
JF - European Biomass Conference and Exhibition Proceedings
T2 - 28th European Biomass Conference and Exhibition, e-EUBCE 2020
Y2 - 6 July 2020 through 9 July 2020
ER -