(Ligno)cellulose nanofibrils and tannic acid as green fillers for the production of poly(vinyl alcohol) biocomposite films

Osolnik, Urša (author), Vek, Viljem (author), Humar, Miha (author), Oven, Primož (author), Poljanšek, Ida (author)

This study compared the use of cellulose nanofibrils (CNF) and lignocellulose nanofibrils (LCNF) in different concentrations to reinforce the poly(vinyl alcohol) (PVA) matrix. Both nanofillers significantly improved the elastic modulus and tensile strength of PVA biocomposite films. The optimum concentration of CNF and LCNF was 6% relative to PVA, which improved the tensile strength of the final PVA biocomposite with CNF and LCNF by 53% and 39%, respectively, compared to the neat PVA film. The addition of LCNF resulted in more elastic films than the addition of CNF to the PVA matrix. The elongation at break of the PVA biocomposite with 2% of LCNF was more than 100% higher than that of the neat PVA film. The integration of tannic acid (TA) into the PVA-LCNF system resulted in antioxidant-active and more water-resistant PVA biocomposites. The three-component biocomposite films with 2 and 6% LCNF and 10% TA exhibited a more than 20° higher contact angle of the water droplet on the surfaces of the biocomposite films and absorbed more than 50% less water than the neat PVA film. New formulations of biocomposite films have been developed with the addition of LCNF and TA in a polymeric PVA matrix.

• Language: English
• Keywords: (ligno)cellulose nanofibrils, biocomposite films, tannic acid, poly(vinyl alcohol), mechanical properties
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publication status: Published
• Publication version: Version of Record
• Year: 2025
• Number of pages: Str. 1-22
• Numbering: Vol. 17, iss. 1, [article no.] 16
• PID: 20.500.12556/RUL-166286
• UDC: 630*8
• ISSN on article: 2073-4360
• DOI: 10.3390/polym17010016
• COBISS.SI-ID: 220936451
• Publication date in RUL: 06.01.2025

Record is a part of a journal

• Title: Polymers
• Shortened title: Polymers
• Publisher: MDPI
• ISSN: 2073-4360
• COBISS.SI-ID: 517951257

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: (ligno)celulozne nanofibrile, biokompozitni filmi, taninska kislina, poli(vinil alkohol), mehanske lastnost