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< 전시-P-53 > Physical and Mechanical Properties Of Hybrid Bamboo Oriented Strand Board
( Fauzi Febrianto ),( Sena Maulana ),( Muhammad Iqbal Maulana ),( Marwanto ),( Soleh Muhammad ),( Rika Kartika Sari ),( Wahyu Hidayat ),( Nam Hun Kim ) 한국목재공학회 2019 한국목재공학회 학술발표논문집 Vol.2019 No.1
Betung and andong bamboos have been known as good raw material of oriented strand board (OSB) due to its great physical and mechanical properties in the each single species OSB. In order to enhance the utillization of these bamboo, hybrid OSB made from combination of betung and andong bamboos were developed. In this study, the physical and mechanical properties of hybrid OSB at different face:core:back ratios were observed. Betung and andong strands were prepared manually using sharp knife and scissor. Three layered hybrid OSB with 0.7 g cm<sup>-3</sup> target density and 8% phenol formaldehyde resin content were manufactured. The face:core:back ratios of hybrid OSB were set to 15:70:15; 20:60:20; 25:50:25; and 30:40:30, with betung bamboo as face layer and andong bamboo as core. Addition of 1% paraffin based on oven dried strands was applied. Physical and mechanical properties of hybrid OSB was evaluated in accordance to the JIS A 5908:2003 standard. The results showed that hybrid OSB with 25:50:25 shelling ratio has optimum mechanical properties. Hybrid OSB made from betung bamboo as face and andong bamboo as core layer has lower gap between mechanical properties in the parallel and perpendicular to face orientation compared to each betung and andong single species OSB.
( Sena Maulana ),( Muhammad Iqbal Maulana ),( Marwanto ),( Yuarsa Gumelar ),( Wahyu Hidayat ),( Nyoman Jaya Wistara ),( Ihak Sumardi ),( Fauzi Febrianto ),( Nam Hun Kim ) 한국목재공학회 2019 한국목재공학회 학술발표논문집 Vol.2019 No.1
The objective of this study was to evaluate the properties of bamboo oriented strand board (BOSB) from betung (Dendrocalamus asper ) bamboo using destructive and non-destructive methods under various shelling ratio and resin content. Strands were vacuum-treated at 126 ºC for 1 h under 0.14 MPa pressure and followed by washing with 1% NaOH solution. Three-layer BOSB (face:core:back) layers with the core layer perpendicular to the surface was formed with 15:70:15; 20:60:20; 25:50:25; 30:40:30 weight ratio and binded with 7 and 8% of phenol formaldehyde (PF) resin with the addition of 1% of wax. The evaluation of physical and mechanical properties of the boards was conducted in accordance with the JIS A 5908:2003 standard and compared with CSA 0437.0 standard for commercial OSB (Grade O-1). The results showed that BOSBs manufactured using 8% resin content with various core-to-face layer ratios had better physical and mechanical properties than using 7% resin content. Increasing core layer ratio increased the strength of BOSBs parallel to the grain. The face:core:back layers ratio of 25:50:25 could be used as a simple way to reduce PF resin requirements from 8% to 7%. Testing of non-destructive mechanical properties in betung BOSB has a high correlation with destructive testing.
( Lukmanul Hakim ZAIN ),( Fauzi FEBRIANTO ),( I Nyoman Jaya WISTARA ),( Marwanto N ),( Muhammad Iqbal MAULANA ),( Seung Hwan LEE ),( Nam Hun KIM ) 한국목재공학회 2019 목재공학 Vol.47 No.5
Cellulose nanocrystals (CNCs) were successfully isolated from oil palm fronds (OPFs) using different concentrations of ammonium persulfate (APS), and their characteristics were analyzed by Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), X-ray diffraction (XRD) analysis, and thermogravimetric analysis (TGA). APS oxidation effectively isolated CNCs with rod-like morphology in nanometer scale. The dimensions of the CNCs decreased with increasing APS concentration. FTIR and XRD analyses revealed that all the CNCs showed crystals in the form of cellulose I without crystal transformation occurring during APS treatment. The relative crystallinity of the CNCs increased with increasing APS concentration, whereas their thermal stability decreased. An APS concentration of 2 M was found to be optimal for isolating the CNCs.