Wettability of oil heat-treated bamboo and bonding strength of laminated bamboo board

Li, Tao; Cheng, D. C.-H.; Wålinder, Magnus; Zhou, Dongshan

doi:10.1016/j.indcrop.2015.02.008

Cited by 74 publications

(34 citation statements)

References 24 publications

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“…Therefore, an adequate preservative treatment of bamboo is necessary so that it can be safely used as a structural element. There are several treating methods to improve the durability and preserve bamboo materials, but some methods which use thermal and natural products like vegetable oils (palm, sunflower, or soybean) have been proved to decrease the mechanical properties of bamboo [31][32][33]. Wahab et al [34] studied tropical bamboo treated in palm oil at 140, 180, and 220 °C during 30, 60, and 90 min.…”

Section: Introductionmentioning

confidence: 99%

Effect of disodium octaborate tetrahydrate on the mechanical properties of Dendrocalamus asper bamboo treated by vacuum/pressure method

2019

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The chemical treatments applied to some lignocellulosic resources commonly used as building materials can influence their mechanical performance during service, and hence, this effect should be studied for structural safety reasons. In this piece of work, prismatic samples of Dendrocalamus asper bamboo were treated in a vacuum/pressure process with disodium octaborate tetrahydrate (DOT) solutions and the corresponding mechanical performance was compared with non-treated and water-treated samples. Full penetration of boron was achieved, with DOT retentions of 14.79 kg m −3 and 21.79 kg m −3 for 5% and 8% (wt/wt%) solutions, respectively. Dynamic modulus of elasticity (MOE), static MOE, and compressive modulus of elasticity of the material, with values between 23.3-24.0, 15.9-16.2, and 26.2-27.2 GPa, respectively, were statistically equivalent for all the analyzed treatment conditions. However, a significant influence of the treatment could be observed on the specific compressive strength of bamboo, showing an increase of 35.3% for the 5% solution and 30.6% for the 8% solution. Although without statistical difference among the treatments, similar behavior was observed on the specific modulus of rupture (MOR) under flexural loading, with an increase of up to 10.1% in relation to the reference for the treated samples. The results achieved in the present study from nondestructive excitation pulse, three-point bending, and axial compression tests demonstrated that mechanical behavior of bamboo was preserved or even enhanced by the proposed treatments based on disodium octaborate tetrahydrate.

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Section: Introductionmentioning

confidence: 99%

Effect of disodium octaborate tetrahydrate on the mechanical properties of Dendrocalamus asper bamboo treated by vacuum/pressure method

2019

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“…There are also some eco-friendly methods to improve the durability, which use thermal and natural products like vegetable oils (palm, sunflower, or soy bean) [6, 13,14]. Some of the studies in the literature investigated influences of the oil-treatment on the bamboo mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

A Bamboo Treatment Procedure: Effects on the Durability and Mechanical Performance

2017

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Bamboo is a natural material having a fast reproduction and high mechanical strengths. However, when a bio-based material in general, and bamboo in particular are expected to be a construction material, their sensitivity to moisture and their durability are usually questionable. Indeed, it is well known that these materials do not possess the same performance in the long-term, when compared to industrial materials. Sustainable solutions for the bamboo treatment still need to be investigated. The present study explores the oil-heated treatment with different types of oils, like flax or sunflower oils. The present investigation concentrates on mechanical properties and durability of treated bamboos to assess the effectiveness of these kinds of treatment. First, bamboo specimens were treated to decrease their sensitivity to moisture and improve their durability. Different conditions of treatment were tested: treatment at 100 • C or 180 • C; with flax oil, sunflower oil, or without oil; treatment durations of 1 h, 2 h, or 3 h; and, different cooling methods and cooling durations. Then, mechanical and durability tests were carried out on untreated and treated bamboos: uniaxial compression tests, 3 points bending tests, water immersion tests, and humidity tests. The results showed that some tested treatment methods could increase both the durability and the compressive strength of treated specimens, compared to untreated bamboo. The best results were observed on specimens treated at 180 • C during 1 h or 2 h without oil, and then cooled in 20 • C sunflower oil.

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“…Therefore, it has been widely used in its natural form for light‐framed constructions and furniture or as fiber feedstock for pulp and paper . Besides, it can be also used to produce bamboo fiber reinforced composites (BFC), which have been finding extensive applications spanning from decorating materials to constructions for their excellent physico‐mechanical performances and low threaten to environment .…”

Section: Introductionmentioning

confidence: 99%

Improvement of the water repellency, dimensional stability, and biological resistance of bamboo‐based fiber reinforced composites

et al. 2017

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In this study, a novel composite was fabricated based on phenol‐formaldehyde (PF) resin and bamboo fiber bundles. Various characterization techniques including fluorescence microscope, scanning electron microscopy coupled with energy‐dispersive X‐ray, and transmission electron microscope were used to investigate the distribution of fibers and infiltration of PF resin. The water repellency, dimensional stability, and decay resistance against both white‐rot (Trametes versicolor) and brown‐rot (Gloeophyllum trabeum) of the composites were also tested. The results showed that the resin not only deposited on the fibers surface, but also entered into the cellular wall and cell lumina through the pits. A great amount of resin was found in cracks and middle lamella of cell wall in resin impregnated bamboo fiber bundles owing to the mechanical defibering process. After thermal compressing, the bamboo cells were densified. The resin was redistributed in cell lumen and glue‐joints were formed. Some chemical reactions occurred between PF and bamboo by formation of aromatic esters and ether bonds, and the ether bonds were dominant. Thus, significant improvements in water repellency, dimensional stability, and biological resistance were achieved. These results suggested the composites can be used in exterior applications where high levels of water repellency and fungi resistance were required. POLYM. COMPOS., 40:506–513, 2019. © 2017 Society of Plastics Engineers

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Wettability of oil heat-treated bamboo and bonding strength of laminated bamboo board

Cited by 74 publications

References 24 publications

Effect of disodium octaborate tetrahydrate on the mechanical properties of Dendrocalamus asper bamboo treated by vacuum/pressure method

Effect of disodium octaborate tetrahydrate on the mechanical properties of Dendrocalamus asper bamboo treated by vacuum/pressure method

A Bamboo Treatment Procedure: Effects on the Durability and Mechanical Performance

Improvement of the water repellency, dimensional stability, and biological resistance of bamboo‐based fiber reinforced composites

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