Properties of Laminated Composite Panels Made from Fast-Growing Species Glued with Mangium Tannin Adhesive

Abstract

Laminated composite is a wood panel constructed from timber pieces then are laminated together. Bio-adhesives such as tannin adhesive are a potential alternative to synthetic adhesives. The purposes of this study were to characterize the chemical makeup of tannin from mangium (Acacia mangium) bark extract and to determine the physical-mechanical properties of the panels made from jabon (Anthocephalus cadamba) and sengon (Falcataria moluccana), and adhesives based on either mangium tannin or methylene diphenyl diisocyanate (MDI). The panels made from five layers of lamina were 5 cm × 24 cm × 120 cm in thickness, width, and length, respectively. Based on results from gas chromatography-mass spectrometry, mangium tannin had 34.04% phenolic compounds. Both wood species were low density, 0.31 g/cm 3 for sengon and 0.44 g/cm 3 for jabon, with an average moisture content of 12.4%. The panels had better width shrinkage than solid wood, with an anti-shrink efficiency of 72.5%. With regard to mechanical properties, none of the panels met the standard for the MOE or shear strength; however, sengon panel with MDI met the standard for MOR. In the delamination test, sengon panel was resistant to cold water immersion. All panels had low formaldehyde emission and met the standard requirements.

Physical-mechanical properties and durability enhancement of glued laminated lumber made from inner part of Gewang (Corypha utan Lam.) trunk: The effect of lamina densification and lumber smoking

“…It was found that density of GLIT composed of densified lamina was higher than density of GLIT composed of undensified lamina, both smoked and unsmoked, as well as density of solid lumber made from the inner part of gewang trunk. The density values of GLIT composed of densified lamina, both smoked (0.61 g/cm 3 ) and unsmoked (0.69 g/cm 3 ), were higher than density of glue laminated panels made from sengon (0.31 to 0.32 g/cm 3 ) and jabon wood (0.44 to 0.47 g/cm 3 ) as studied by Hendrik et al (2016). Sengon and jabon are widely known as two Indonesia fast growing tree species that are commonly used in the wood composite industry in the country.…”

“…It was found that shear strength of GLIT composed of densified lamina was higher than the shear strength of GLIT composed of undensified lamina, both smoked and unsmoked, as well as the shear strength of solid lumber made from the inner part of gewang trunk. The shear strength of GLIT composed of densified lamina, both smoked (3.83 MPa) and unsmoked (4.15 MPa), were higher than shear strength of glue laminated panels made from jabon wood (2.47 MPa), as studied by Hendrik et al (2016). However, shear strengths of GLIT composed of densified lamina were still lower than shear strength of solid lumber made from the outer part of gewang trunk, both smoked (9.08 MPa) and unsmoked (9.01 MPa).…”

“…Glulam is an alternative product for structural material that uses wood from plantation forests (Massijaya 2014) or from small diameter logs with inferior properties such as low physical and mechanical properties (Massijaya et al 2011). Several studies to improve physical and mechanical properties of Indonesia's low quality wood species have been previously conducted, for instance Lestari et al (2018) studied glued laminated lumber, Hendrik et al (2016) studied laminated composite panel, and Hadi et al (2013Hadi et al ( , 2019 studied methyl methacrylate impregnated wood. Considering that the inner part of gewang trunk has low physical and mechanical properties (Nandika et al 2020), the authors considered densifying the laminas prior to the composing process to become glued laminated lumber.…”

Kualitas Kayu Laminasi Dengan Perekat Tanin Dari Ekstrak Kulit Kayu Mahoni

“…dan tancang (Prunilva spp.) (Santoso, 2011;Santoso, Hadi, & Malik, 2012;Hendrik, Hadi, Massijaya, & Santoso, 2016). Zat ekstraktif dari serbuk kayu merbau (Intsia spp.)…”

Keteguhan Rekat Dan Emisi Formaldehida Papan Lamina Rotan Menggunakan Perekat Tanin Formaldehida

“…Limbah kayu mengandung tanin dan dapat digunakan sebagai perekat di mana kandungan tanin dari setiap jenis pohon berbeda (Santoso, 1999;Santoso, Malik, & Hadi, 2015). Beberapa penelitian menggunakan tanin dari limbah kayu sebagai perekat seperti limbah kulit kayu mangium (Hendrik, Hadi, Massijaya, & Santoso, 2016;Rachmawati, Sugita, & Santoso, 2018), limbah kulit kayu mahoni (Supriatna, 2017) dan limbah serbuk kayu gergajian merbau (Surya, 2018) menunjukkan nilai emisi formaldehida yang memenuhi standar dan memberikan peluang penggunaan perekat tanin pada pembuatan produk eksterior.…”