Organosolv lignin barrier paper coatings from waste biomass resources

Lavrič, Gregor (author), Zamljen, Aleksandra (author), Juhant Grkman, Janja (author), Jasiukaityte, Edita (author), Grilc, Miha (author), Likozar, Blaž (author), Gregor-Svetec, Diana (author), Vrabič Brodnjak, Urška (author)

The aim of the study was to isolate lignin from organosolv, beech tree (Fagus sylvatica), and Japanese knotweed (Reynoutria japonica), to use it for paper surface and to replace part of the non-renewable product resources with bio-based ones. A total of nine coated samples with different lignin formulations and starch were compounded, prepared, and evaluated. The basic (grammage, thickness, specific density), mechanical (elongation at break, tensile, burst and tear indices), and barrier properties (contact angle, water penetration, water vapour permeability, kit test) of the coated papers were investigated. The analysis showed no significant difference in tensile properties between uncoated and coated samples. Furthermore, the decrease in water vapour transmission rate and the lower contact angle for coated samples were nevertheless confirmed. The novel coating materials show promising products with very good barrier properties. Finally, the correlation between structural, morphological, and (other) natural lignin-based factors was revealed, highlighting the importance of parameters such as the equivalence ratio of aliphatic and phenolic hydroxyl groups or the average molecular weight. Tuning functionality by design could optimise performance in the future.

• Language: English
• Keywords: beech wood biomass, Japanese knotweed invasive species, barrier properties, mechanical properties, molecular weight distribution, nuclear magnetic resonance, size exclusion chromatography
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: 13 str.
• Numbering: Vol. 13, iss. 24, art. 4443
• PID: 20.500.12556/RUL-136936
• UDC: 676
• ISSN on article: 2073-4360
• DOI: 10.3390/polym13244443
• COBISS.SI-ID: 90166019
• Publication date in RUL: 25.05.2022

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.
• Licensing start date: 17.12.2021

Secondary language

• Language: Slovenian
• Keywords: biomasa bukovega lesa, invazivne vrste japonskega dresnika, zaporne lastnosti, mehanske lastnosti, porazdelitev molekulske mase, jedrska magnetna resonanca, kromatografija