Environmentally friendly natural polymers for modification of wood adhesives

• Autorzy: Matyašovský J. , Duchovič P. , Jurkovič P. , Sedliačik J.
• Języki publikacji: EN

Abstrakty

EN

Urea formaldehyde (UF) adhesives are the most commonly used for wood-based panels, but their main disadvantage is an intensive formaldehyde emission. The aim of the investigation was to reduce the release of formaldehyde from UF bonded wood materials by developing and testing new methyl-ol pre-condensate additives with varying ratios of glutaraldehyde and urea. Pre-condensates were modifying by hydrolysates collagen and keratin, polymer polyphenolic molecules of vegetable tannins. Results of laboratory tests confirmed, that natural bio-polymers are suitable additives for lowering of formaldehyde emission from wood products glued with UF adhesive. Methylol pre-condensate additives and their modifications with antioxidant properties significantly reduced formaldehyde emissions from urea-formaldehyde adhesives. The most significant decrease of formaldehyde emission up to 34.7% was achieved with the application sample No. 9 – UF resin + 20% technical flour + 2% (methylol pre-condensate MOD-II+ keratin) + 4% hardener into UF adhesive standard. Formaldehyde emissions were assessed from five-layer plywood according to JIS A 1460 (2001).“Building boards. Desiccator method” Quality of gluing was tested according to standards EN 314-1 and EN 314-2. Tested plywood fulfils the requirements of the standard for class of gluing 1 – they are suitable for application in normal interior environment.

Słowa kluczowe

EN

UF adhesive; methyl-ol pre-condensate; biopolymers; modifier; gluing; plywood; formaldehyde

• Wydawca: Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
• Czasopismo: Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
• Rocznik: 2018
• Tom: No. 104
• Strony: 174--181
• Opis fizyczny: Bibliogr. 13 poz.

Twórcy

autor

Matyašovský J.

• VIPO a.s., Partizánske, Gen. Svobodu1069/4, 958 01 Partizánske, Slovakia

autor

Duchovič P.

• VIPO a.s., Partizánske, Gen. Svobodu1069/4, 958 01 Partizánske, Slovakia

autor

Jurkovič P.

• VIPO a.s., Partizánske, Gen. Svobodu1069/4, 958 01 Partizánske, Slovakia

autor

Sedliačik J.

• Faculty of Wood Sciences and Technology, Technical University, Masaryka 24, 960 53 Zvolen, Slovakia

Bibliografia

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• 2. PÜNTERER, A., 1995: The Ecological challenge of producing leather. JALCA 90, 206-215.
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• 5. MATYAŠOVSKÝ J., KOPNÝ J., MELUŠ P., SEDLIAČIK J., SEDLIAČIK M., 2001: Modifikácia polykondenzačných lepidiel bielkovinami. In: Pokroky vo výrobe a použití lepidiel v drevopriemysle. TU Zvolen, s. 37-42.
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• 7. SEDLIAČIK J., SEDLIAČIKOVÁ M., 2009: Innovation tendencies at application of adhesives in wood working industry. In: Annals of Warsaw University of Life Sciences – SGGW. Forestry and Wood Technology, Warszawa, No 69, s. 262-266.
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• 11. WANG, S., PIZZI, A. 1997. Succinaldehyde-induced water resistance improvements of UF wood adhesives. In Holz Roh-Werkst 55, p. 9–12.
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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).