Effect of Bamboo Species and Resin Content on Properties of Oriented Strand Board Prepared from Steam-treated Bamboo Strands

Abstract

The objective of this research was to evaluate the effect of bamboo species and resin content on the physical and mechanical properties of oriented strand boards (OSBs) prepared from steam-treated bamboo strands. The strands from three species of Indonesian bamboo, namely Andong (Gigantochloa verticillata), Betung (Dendrocalamus asper), and Ampel (Bambusa vulgaris), were steamed at 126 °C for 1 h at a pressure of 0.14 MPa. Three-layered OSBs with the core layer oriented perpendicularly to the face layers were prepared by bonding them together with 3 to 5% methylene diphenyldiisocyanate (MDI) resin based on ovendried strands and with the addition of 1% paraffin. The strand compositions for the face, core, and back layers were 25%, 50%, and 25%, respectively. The slenderness ratios and aspect ratios of the strands ranged from 71.02 to 76.60 and from 2.96 to 3.02, respectively. The physical and mechanical properties of the OSBs fabricated from Andong and Betung were better than those from Ampel, and the properties of all OSBs were improved by increasing their resin content. OSBs from Betung with 3 to 5% resin content and those from Andong and Ampel with 4 to 5% resin content showed strength retention of more than 50%, which means they can be used for exterior structural applications. Except for OSBs fabricated from Ampel with 3% resin content, the properties of all OSBs prepared in this study were higher than the minimum values required by the CSA O437.0 (grade O-1) standard (2011).

Sifat Fisis dan Mekanis Oriented Strand Board Hibrida Bambu Pada Berbagai Shelling Ratio (Physical and Mechanical Properties of Hybrid Bamboo Oriented Strand Board at Various Shelling Ratios)

“…OSB hibrida bambu dibuat dengan kerapatan target 0,7 g cm -3 dan kadar perekat fenol formaldehida 8%. OSB hibrida bambu dibagi menjadi 3 lapisan (face: core: back) (Betung: Andong: Betung Prosedur dan perhitungan parameter pengujian sifat fisis dan mekanis OSB mengacu pada Febrianto et al (2015). Pengujian sifat fisis dan mekanis OSB mengunakan standar JIS A 5908:2003 (JSA 2003).…”

“…Penjelasan tersebut memperjelas bahwa semakin meningkatnya lapisan permukaan OSB hibrida bambu Betung dan Andong akan meningkatkan stabilitas dimensinya. Dengan kata lain, menurunnya nilai PT dan DSA (Febrianto et al 2015, Maulana 2019b. Meskipun demikian, seluruh OSB hibrida bambu pada penelitian ini telah memenuhi standar CSA 0437.0 (Grade O-1) yang mensyaratkan nilai pengembangan tebal OSB ≤ 15%.…”

SIFAT FISIS DAN MEKANIS PAPAN UNTAI BERARAH DARI BAMBU TALI (Gigantochloa apus (J.A. & J.H. Schultes) Kurz)

“…Nilai MOR OSB campuran kayu Calophyllum inophyllum Paulownia coreana dan yang direkat dengan perekat fenol formaldehida dengan kadar perekat 3,5% adalah 25,6 MPa atau 2 261,1 kg/cm sedangkan yang dibuat dengan kadar perekat 4,5% adalah 26,5 MPa atau 270,3 2 kg/cm (Oh & Kim, 2015). Sementara itu Febrianto et al (2015) Berdasarkan data pada Tabel 3 dapat diketahui bahwa nilai rata-rata MOE sejajar dan tegak lurus serat OSB bambu yang dibuat dari untai panjang 7,5 cm berturut-turut meningkat 7,8% dan 5,6% dibanding dengan OSB bambu yang dibuat dari untai panjang 10 cm dan berturut-turut meningkat 38,5% dan 28% dibanding dengan OSB bambu yang dibuat dari untai panjang 15 cm. Hasil uji beda pada Tabel 5 menunjukkan bahwa panjang utai 7,5 cm tidak berbeda nyata pengaruhnya terhadap MOE OSB bambu dengan panjang untai 10 cm tetapi berbeda nyata dengan panjang untai 15 cm.…”

Variation of anatomical characteristics within the culm of the three Gigantochloa species from Indonesia

“…It is estimated that more than 2.5 billion people depend on bamboo for their economy and one billion people live in traditional bamboo houses (Lobovikov et al 2007). Several studies show the potential of bamboo as an alternative to wood composite materials (Febrianto et al 2012(Febrianto et al , 2015Hidayat et al 2019;Maulana et al 2019) and as a fuel source or biomass energy raw material (Park et al 2018(Park et al , 2019(Park et al , 2020.…”