Study of the adhesion of silicate-based coating formulations on a wood substrate

Cheumani-Yona, Arnaud Maxime (avtor), Žigon, Jure (avtor), Dahle, Sebastian (avtor), Petrič, Marko (avtor)

Silicate coatings are environmentally friendly inorganic-based products that have long been used for mineral substrates and protection of steel against corrosion. The development and acceptance of these coatings in the wood sector require some adjustments in formulations or special preparation of the surface to be coated to obtain durable finishes. In this work, the adhesion of various silicate-based formulations to a beech wood substrate (Fagus sylvatica L.), was assessed with the main objective to study relevant parameters and potential improvements. Adhesion strength was determined by pull-off and cross-cut tests. Other coating properties such as scratch, impact, and water resistance were also determined. Surface roughness and interface were analyzed using confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM), and coating curing was studied by attenuated total reflection-infrared spectroscopy (ATR FTIR). The results showed that adhesion was highly dependent on formulation, penetration of the coatings into wood, and mechanical anchoring. Increasing the content of solid particles in the coating formulations or adding a polyol (glycerol, xylose), which probably acted as a coalescent, considerably decreased the adhesion strength, probably by blocking penetration into the wood by forming aggregates. Adhesion was improved by pre-mineralization of the surface, and substitution of a part of the potassium silicate binder with potassium methyl siliconate reduced the formation of cracks caused by dimensional instability of the wood.

• Jezik: Angleški jezik
• Ključne besede: coating, silicate, water glass, wood, potassium methyl siliconate, adhesion
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: BF - Biotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: 15 str.
• Številčenje: Vol. 11, iss. 1, art. 61
• PID: 20.500.12556/RUL-127539
• UDK: 630*829
• ISSN pri članku: 2079-6412
• DOI: 10.3390/coatings11010061
• COBISS.SI-ID: 46144771
• Datum objave v RUL: 14.06.2021

Gradivo je del revije

• Naslov: Coatings
• Skrajšan naslov: Coatings
• Založnik: MDPI AG
• ISSN: 2079-6412
• COBISS.SI-ID: 523035673

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 07.01.2021

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: premazi, silikati, les, kalijev metil silikonat, oprijem

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: N4-0117
• Naslov: Silikatni premazi za les z odlično trajnostjo

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P4-0015
• Naslov: Les in lignocelulozni kompoziti