Izvorni znanstveni članak

https://doi.org/10.5552/drvind.2020.1919

Properties of Plywood Produced with Urea-Formaldehyde Adhesive Modified with Nanocellulose and Microcellulose

Jakub Kawalerczyk orcid.org/0000-0002-5539-1841 ; Department of Wood Based Materials, Faculty of Wood Technology, Poznań University of Life Sciences, Poznań, Poland
Dorota Dziurka orcid.org/0000-0001-6197-7825 ; Department of Wood Based Materials, Faculty of Wood Technology, Poznań University of Life Sciences, Poznań, Poland
Radosław Mirski orcid.org/0000-0002-4881-579X ; Department of Wood Based Materials, Faculty of Wood Technology, Poznań University of Life Sciences, Poznań, Poland
Kinga Szentner orcid.org/0000-0003-1909-9111 ; Department of Chemistry, Faculty of Wood Technology, Poznań University of Life Sciences, Poznań, Poland

Sažetak

Urea-formaldehyde adhesives are widely used in the wood-based materials industry. The study investigates the possibility of using cellulosic particles as a filler that modifies the properties of the resin and consequently improves the properties of plywood. Moreover, the study also examines the differences between microcellulose and nanocellulose used as a filler for UF adhesive. Based on the investigations, it was found that the addition of MFC and NCC significantly affected the curing process and rheological behaviour of adhesive mixtures. Modification led to increase of viscosity and extension of a gel time caused by lowering solid content of the resin. The experimental and reference plywood were tested in terms of bonding quality and mechanical properties such as modulus of elasticity and modulus of rigidity in accordance with applicable standards. The results of the tests confirmed that both the amount and the type of modifier added to the resin had a significant effect on the properties of plywood. The bonding quality and the above mentioned mechanical properties improved in all variants of modification; however the most effective was the addition of NCC in the amount of 10 %/100 g of solid resin. The slight decrease of formaldehyde emission was only observed for 5 % cellulosic particles added to 100 g of solid UF.

Ključne riječi

nanocellulose; microcellulose; urea-formaldehyde resin; plywood; modification

Hrčak ID:

235811

URI

https://hrcak.srce.hr/235811

Datum izdavanja:

17.3.2020.

Podaci na drugim jezicima: hrvatski

Posjeta: 2.832 *