Effects of Steam Treatment on Physical and Mechanical Properties of Bamboo Oriented Strand Board

Maulana, Sena; busyra, Imam; Fatrawana, Adesna; Hidayat, Wahyu; Sari, Rita Kartika; Sumardi, Ihak; Wistara, Nyoman J; Lee, Seung Hwan; Kim, Nam Hun; Febrianto, Fauzi

doi:10.5658/wood.2017.45.6.872

Cited by 28 publications

(12 citation statements)

References 6 publications

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“…Fiber density can determine bamboo's mechanical and physical qualities, according to Zakikhani et al [20], who evaluated the morphological, mechanical, and physical aspects of four species of bamboo. Maulana et al [21] reported that material density influenced the mechanical and physical parameters of Betung bamboo internodes specimens. The low fiber density affects the occurrence of cracks when tested on the surface of the Betung bamboo internode due to the weak fiber strength.…”

Section: Flexural Test Resultsmentioning

confidence: 99%

Effect of Alkaline 5% NaOH treatment with variations of immersion time on tensile strength and flexural strength of Betung bamboo internode

Zulhanif

Mahtata

Badaruddin

2022

JIAE

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Betung bamboo has a bigger stem diameter, thicker walls, and shorter internodes than other species of bamboo, making it ideal for building materials such as bridges and interior furnishings that may also be turned into works of art. Alkaline NaOH treatment was introduced to Betung bamboo to increase its mechanical properties. The alkaline treatment used a solution consisting of 5 %NaOH. Specimens with alkaline treatment were immersed into 5%NaOH solution for one hour, two hours, and three hours, followed by two hours of drying in a furnace at 60 °C. Tensile tests (ASTM D638) and flexural tests (ASTM D790) were carried out using servo hydraulics MTS Landmark 100 kN under static loading. The tensile strength, modulus of rupture (MOR) and modulus of elasticity (MOE) were analyzed from the results tests. The average maximum tensile strength of the Betung bamboo internode immersed for two hours into 5%NaOH solution is about 195.95 MPa, whereas the average values of MOR and MOE are about 207.35 MPa and 4.56 GPa, respectively. The faults and surface conditions in the Betung bamboo internode were observed using fractographic and morphological observations.

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Section: Flexural Test Resultsmentioning

confidence: 99%

Effect of Alkaline 5% NaOH treatment with variations of immersion time on tensile strength and flexural strength of Betung bamboo internode

Zulhanif

Mahtata

Badaruddin

2022

JIAE

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“…Experiments using cheaper adhesives such as phenol-formaldehyde (PF) resin have been carried out, but higher concentrations were required (Adrin et al 2013). This phenomenon was because bamboo has a high extractive content which reduces the quality of BOSB adhesion Maulana et al 2017;Murda et al 2018). Therefore, the adhesive penetration to BOSB was not optimized.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the adhesive penetration to BOSB was not optimized. Our previous studies showed that pre-thermal treatment, such as steam modification on bamboo strands, reduced extractive substances, thereby improving the dimensional stability and mechanical properties of BOSB (Maulana et al 2016(Maulana et al , 2017(Maulana et al , 2018. Prethermal treatment on woody materials converted free sugars into furan intermediates and furan resins (Maloney 1993).…”

Section: Introductionmentioning

confidence: 99%

Physical and Mechanical Properties of Bamboo Oriented Strand Board Under Various Post-Thermal Treatment Duration

Mangurai

Maulana²,

Murda³

et al. 2022

J. Sylva Lestari

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Post-treatment of bamboo-oriented strand board (BOSB) through thermal modification can be an alternative to improve BOSB quality. This study aimed to analyze the effect of post-thermal treatment duration on the physical and mechanical properties of BOSB. Three-layers BOSB with a target density of 0.7 g/cm3 was made with the core layer perpendicular to the surface and bonded with 8% phenol-formaldehyde resin. The BOSB produced was then thermally-modified at 160°C for 1, 2, and 3 h. The physical and mechanical properties of BOSB were determined based on JIS A 5908-2003 standard. The results showed that the physical properties of the thermally-modified BOSB increased while the mechanical properties decreased compared to the untreated BOSB. The moisture content (MC), water absorption (WA), and thickness swelling (TS) of BOSB decreased with the increase in post-thermal treatment duration. The decrease in MC, WA, and TS of the thermally-modified BOSB reached 38.60%, 11.92%, and 33.26%, respectively. In addition, the decrease in modulus of elasticity (MOE), modulus of rupture (MOR), and internal bonding of the thermally-modified BOSB reached 19.18%, 23.15%, and 53.51%, respectively. The results showed that TS, MOE, and MOR of the thermally-modified BOSB still could meet the 0437.0 standards for commercial OSB (Grade O-1). Keywords: bamboo-oriented strand board, Dendrocalamus asper, physical and mechanical properties, post-thermal treatment, treatment duration

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“…The issues are the high content of extractive substances in bamboo, which prevents adhesive penetration (Pizzi and Kumar 2019), and low dimensional stability due to amorphous components such as hemicellulose (Fatrawana et al 2019). Therefore, several studies have found a solution by steam modification treatment at 126°C under 0.14 MPa pressure (Adrin et al 2013;Febrianto et al 2015;Maulana et al 2017). Steam modification treatment on the bamboo strand can remove low molecular weight components such as hemicellulose and extractives so that BOSB has better properties such as a better gluing process, better dimensional stability, and better resistance to deterioration factors (Fatrawana et al 2019;Maulana et al 2017Maulana et al , 2021aMaulana 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, several studies have found a solution by steam modification treatment at 126°C under 0.14 MPa pressure (Adrin et al 2013;Febrianto et al 2015;Maulana et al 2017). Steam modification treatment on the bamboo strand can remove low molecular weight components such as hemicellulose and extractives so that BOSB has better properties such as a better gluing process, better dimensional stability, and better resistance to deterioration factors (Fatrawana et al 2019;Maulana et al 2017Maulana et al , 2021aMaulana 2018). However, the steam modification treatment requires a lot of energy, tools, and time.…”

Section: Introductionmentioning

confidence: 99%

Changes in Chemical Composition of Betung Bamboo (Dendrocalamus asper) after Alkali Immersion Treatment under Various Immersion Times

et al. 2022

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This research aimed to analyze the change in chemical composition of the betung bamboo (Dendrocalamus asper) strands after alkali immersion treatment under various immersion times. The bamboo culms were converted into strands with the target length, width, and thickness of 70, 25, and 0.5 mm, respectively. Strands were alkali immersion-treated with 1% NaOH solution for 1, 2, and 3 h. Preparation of powder for chemical component analysis refers to the Technical Association of the Pulp and Paper Industry (TAPPI) standard T 264 cm-07 regarding the preparation of wood test samples for chemical analysis. Structural and non-structural bamboo strand chemical components such as holocellulose, alpha-cellulose, hemicellulose, klason lignin, and extractives were analyzed. The results showed that alkali immersion treatment decreased the hemicellulose content from 21.55% before treatment to 20.30% after 3 h immersion. Thus, it changed the holocellulose and alpha-cellulose composition. Alkali immersion treatment also changed the extractive substances dissolved in cold water, hot water, 1% NaOH, and ethanol-benzene solution. The decrease in hemicellulose, molecular weight lignin, and extractive substances would be beneficial for bamboo-oriented strand board manufacture to improve strand adhesion, dimensional stability, mechanical properties, and durability against biological agents attack. Keywords: alkali immersion times, alkali immersion treatment, bamboo, chemical components, pre-treatment

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Effects of Steam Treatment on Physical and Mechanical Properties of Bamboo Oriented Strand Board

Cited by 28 publications

References 6 publications

Effect of Alkaline 5% NaOH treatment with variations of immersion time on tensile strength and flexural strength of Betung bamboo internode

Effect of Alkaline 5% NaOH treatment with variations of immersion time on tensile strength and flexural strength of Betung bamboo internode

Physical and Mechanical Properties of Bamboo Oriented Strand Board Under Various Post-Thermal Treatment Duration

Changes in Chemical Composition of Betung Bamboo (Dendrocalamus asper) after Alkali Immersion Treatment under Various Immersion Times

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