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Muhammad Iqbal Maulana,Marwanto Marwanto,Soleh Muhamad,Sena Maulana,Rita Kartika Sari,Wahyu Hidayat,Deded Sarip Nawawi,Siti Nikmatin,Nam-Hun Kim,Fauzi Febrianto 강원대학교 산림과학연구소 2019 강원대학교 산림과학연구소 학술대회 Vol.2019 No.09
The objective of this study was to evaluate the physical and mechanical properties of mangium wood and betung bamboo hybrid oriented strand board (OSB) with steam treatment. Mangium (Acacia mangium Willd.) and betung bamboo (Dendrocalamus asper (Schult.F) Backer ex. Heyne) strands were steamed at 126ºC temperature and 0.14 MPa pressure for 1 hour. Hybrid OSB with 30 × 30 × 0.9 cm³ size and 0.7 g.cm-3 target density were prepared from mangium strands as face layers and bamboo strands as core layer. Phenol formaldehyde adhesive content of 8% and shelling ratio of 25/50/25 were used. The evaluation of hybrid OSB properties were refering to the JIS A 5908-2003 standard. The results showed that the steam treatment improves the physical and mechanical properties of the resulting OSB hybrids. Observed physical and mechanical properties of hybrid OSB meet the requirements of CSA 0437.0 (Grade O-1) standard. Steam treatments reduce the hemicellulose and extractives content of mangium and betung bamboo strands.
Fauzi Febrianto,Yudha Pradana,Marwanto Marwanto,Muhammad Iqbal Maulana,Deded Sarip Nawawi,Wahyu Hidayat,Denni Prasetia,Nam Hun Kim 강원대학교 산림과학연구소 2021 강원대학교 산림과학연구소 학술대회 Vol.2021 No.10
This research evaluated the effect of strand pretreatment and strand mixture ratio on the properties of Dual-Species Bamboo Oriented Strand Board (DS-BOSB) from andong and tali bamboo. Andong and tali bamboo strands were steamed at 126 °C for 1 hour under 0.14 MPa pressure and followed by rinsing by 1% NaOH solution. The two types of strands were then mixed by the ratio of 100:0, 75:25, 50:50, 25:75, and 0:100 for andong and tali strand respectively. Three layered DS-BOSB was made with 0.7 g/cm3 target density and 8% phenol formaldehyde adhesive content. The shelling ratio of boards was 25:50:25 with the size of (30x30x0.9) cm3. The measurement of physical and mechanical properties for DS-BOSB evaluation referred to the JIS A 5908 (2003) standard and the results were compared with the CSA 0437.0 (Grade O-1) standard. The results showed that the steam-treated followed by 1% NaOH rinse on the strand increased the dimensional stability and mechanical strength (internal bond) of DS-BOSB. The higher ratio of tali bamboo improved the dimensional stability and internal bonding of DS-BOSB. The optimal mixture ratio to produce OSB from andong and tali bamboo were 50:50. All OSBs meet CSA 0437.0 (Grade O-1) standard.
Anatomical characteristics and chemical components content of indonesian bamboos species
Muhammad Iqbal Maulana,Rio Ardiansyah Murda,Marwanto Marwanto,Byantara Darsan Purusatama,Denni Prasetia,Deded Sarip Nawawi,Siti Nikmatin,Wahyu Hidayat,Nam-Hun Kim,Fauzi Febrianto 강원대학교 산림과학연구소 2019 강원대학교 산림과학연구소 학술대회 Vol.2019 No.09
The aims of this study was to characterize the anatomical structure and the chemical properties of seven bamboo species that grow in Indonesia. Species of bamboo used in this study include betung bamboo (Dendrocalamus asper), sembilang bamboo (Dendrocalamus giganteus), andong bamboo (Gigantochloa pseudoarundinacea), tali bamboo (Gigantochloa apus), hitam bamboo (Gigantochloa artoviolacea), ampel bamboo (Bambusa vulgaris var. vulgaris), and kuning bamboo (Bambusa vulgaris var. striata). Anatomical characteristics observed include vascular bundle type and cell dimension in three microscopic sections. Chemical properties examination includes the determination of holocellulose content, alpha cellulose content, lignin content, extractives content, acidity, and buffering capacity. The observations showed that the type of vascular bundles III were found in sembilang bamboo, tali bamboo, andong bamboo, and ampel bamboo. Meanwhile, betung bamboo, hitam bamboo and kuning bamboo have a type of vascular bundle IV. The highest holocellulose and alpha-cellulose content were found in ampel and hitam bamboo, respectively. The pH value of the seven types of bamboo shows that all bamboo species tend to be acidic.
Fauzi Febrianto,Muhammad Iqbal Maulana,Marwanto Marwanto,Deded Sarip Nawawi,Siti Nikmatin,Rita Kartika Sari,Wahyu Hidayat,Denni Prasetia,Nam Hun Kim 강원대학교 산림과학연구소 2021 강원대학교 산림과학연구소 학술대회 Vol.2021 No.10
The objective of this study was to determine the effect of delignification on the properties of bamboo cellulose nanofibers and its nanocomposites. Milled bamboo powder (150-200 mesh) was delignified with sodium chlorite-acetic acid (SC-AA) treatment in reactions 1, 2, 3, and 4 cycles. The delignified bamboo fibers were then fibrillated using wet disk mill (Supermasscolloider MKCA6-2, Masuko Sangyo, Japan). The morphology, functional groups, and crystalline properties of the fibrillation products were characterized. Bamboo cellulose nanofibers and polyvinyl alcohol (PVA) matrix were used to prepare nanocomposites. The physical, optical, and mechanical properties of the nanocomposite were evaluated. The results showed that lignin content of ampel bamboo decreased 12% to 83% after SC-AA delignification. The diameter of ampel bamboo cellulose nanofibers decreased with increasing delignification. The Fourier Transform Infra-Red (FTIR) spectra confirmed that there was a decrease in lignin content although there were still residues left on the cellulose nanofibers. The crystallinity and atomic size of the crystals decreased with increasing delignification reaction. The water absorption and solubility of nanocomposites decreased with increasing delignification reaction on ampel bamboo. Ampel bamboo cellulose nanofibers with 4 times delignification had the highest nanocomposite transparency. Nanocomposite strength increased with increasing delignification.
( 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.
< 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.
Renny Purnawati,Muhammad Iqbal Maulana,Marwanto,I Nyoman J Wistara,SitiNikmatin,WahyuHidayat,FauziFebrianto,NamHunKim 강원대학교 산림과학연구소 2017 강원대학교 산림과학연구소 학술대회 Vol.2017 No.11
Recently, natural fiber derived from lignocellulosic materialsis considered to have better properties than the petroleum-based synthetic fiber. Several natural fibers that are potential to be developed are kapok and balsa seed pod fibers. Both of kapok and balsa fibers’characteristics must be known to determine its suitability for many applications. The purpose of this study is to analyze some important basic properties of kapok and balsa fibers including its dimension, morphology, chemical compound and wettability. The results of study showed that the average fiber length of kapok and balsa were 1.63 cm and 1.30 cm, respectively. Kapok and balsa fibers had thin cell wall and large lumen filled with air. The essential chemical components of kapok fiber observed were α-cellulose, lignin and wax content by 38.09%, 14.09%, and 2.34%, respectively. While, balsa fiber observed contains chemical components of 44.62% α-cellulose, 16.60% lignin and 2.29% wax content, respectively. There were similarities between kapok and balsa fibers’ characteristics due to the XRD, FTIR and DSC data obtained. The contact angle between aquadest and kapok as well as balsa fibers was more than 90°, so that both fibers had hydrophobic and low wettability properties due to the presence of wax content on the fiber surface.
( 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.