Effect of Using Urea Formaldehyde Modified with Extracts in Plywood on Formaldehyde Emission

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BİLGİN U., ÇOLAKOĞLU G.

DRVNA INDUSTRIJA, cilt.72, sa.3, ss.237-244, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 72 Sayı: 3
  • Basım Tarihi: 2021
  • Doi Numarası: 10.5552/drvind.2021.2005
  • Dergi Adı: DRVNA INDUSTRIJA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, CAB Abstracts, Compendex, Environment Index, Geobase, Veterinary Science Database
  • Sayfa Sayıları: ss.237-244
  • Anahtar Kelimeler: formaldehyde emission, plywood, elm bark, hazelnut husk, tannin, urea formaldehyde, MECHANICAL-PROPERTIES, SOLID WOOD, BARK, ADHESIVES, TANNINS, PINE, PANELS
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

Formaldehyde-based adhesives are used in the forestry industry. This is because formaldehyde is inexpensive, easy to use and resistant to moisture; it also has particular mechanical effects. Formaldehyde has both advantages and disadvantages. It is known that various diseases such as lung cancer occur in humans as a result of the release of formaldehyde into the air during and after board production. In this study, a urea formaldehyde glue mixture was prepared by using four different fillers (extract of maritime pine (Pinus pinaster) and elm (Ulmus glabra) bark, extract of hazelnut (Corylus avellana) husk and acorn tannins) at two different ratios. The bonding shear strength of pine (Pinus sylvestris) and spruce (Picea orientalis) plywood produced with urea formaldehyde adhesive was tested according to EN 314-1 standard. All plywood, except the plywood with acorn tannin, met the requirements of the standard. A formaldehyde emission test of the plywood was carried out in accordance with EN 713-3 standard With this approach, it is possible to quickly determine formaldehyde emissions. Experimental results were obtained for subsequent measurements, including chamber tests. It was observed that the elm bark extract reduced the formaldehyde emission of pine plywood by 40 %, while other fillers reduced it by 3-37 %.