The Effects of Thermal Modification on the Properties of Two Vietnamese Bamboo Species, Part I: Effects on Physical Properties

Nguyễn, Công Trung; Wagenführ, André; Phuong, Le Xuan; Dai, Vu Huy; Bremer, Martina; Fischer, Steffen

doi:10.15376/biores.7.4.5355-5366

Cited by 43 publications

(22 citation statements)

References 21 publications

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“…Samples treated with ethanol solution and treated in water at 90 °C had more violent collisions among molecules than those treated in water at 20 °C. The decomposition of hemicelluloses and the chemical changes of extractives are also accountable for such changes in color (Martina et al 2012;Nguyen et al 2012). In Fig.…”

Section: Resultsmentioning

confidence: 99%

Effects of Acid Dye on the Performance of Bamboo-based Fiber Composites

Hu¹,

Yu²

2014

BioResources

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The objective of this study was to investigate the influence of acid dye on color change, modulus of rupture, modulus of elasticity, shear strength (parallel loading), thickness swelling rate, and water absorption rate of bamboo-based fiber composites from Phyllostachys pubescens. Bamboo fiber veneers were treated with acid black via three procedures: dyed in water at 20 °C, dyed in water at 90 °C, and dyed in ethanol at 75 °C. The samples dyed in ethanol at 75 °C and those dyed in water at 90 °C had a higher exhaustion rate than those dyed in water at 20 °C. The color change of bamboo fiber veneers exhibited similar variation trends by the three methods. The dyeing procedure slightly reduced the modulus of rupture and modulus of elasticity of bamboo-based fiber composites. Compared with the samples dyed in water, the samples dyed in ethanol had reduced shear strength (parallel loading) and modulus of elasticity. The thickness swelling rate and water absorption rate of bamboo-based fiber composite samples were reduced by the dye treatment.

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Section: Resultsmentioning

confidence: 99%

Effects of Acid Dye on the Performance of Bamboo-based Fiber Composites

Hu¹,

Yu²

2014

BioResources

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“…The general mass loss of the samples up to 180 °C was 4%, which is relatively low. It depends on the temperature and on the culm zone (Part I, Nguyen et al 2012).…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore the correlations between these properties were of interest. The changes of physical and mechanical properties are described in part I of this publication (part I: Nguyen et al 2012). In the present paper the changes in chemical composition are described.…”

Section: Introductionmentioning

confidence: 93%

Effects of Thermal Modification on the Properties of Two Vietnamese Bamboo Species. Part II: Effects on Chemical Composition

Bremer¹,

Fischer²,

Nguyen³

et al. 2013

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Bamboo is a very interesting bio resource for building materials because of its combination of strength properties and low density. However, its susceptibility to fungi and insects is problematic. Thermal modification is used in Vietnam to improve the durability and dimensional stability of bamboo. Changes in the chemical composition during this modification are the reason for such physical changes as color, equilibrium moisture content, and strength. This paper will describe the changes in the chemical composition depending on the modification conditions. Furthermore correlations between chemical composition and physical properties, which are presented in Part I, are shown.

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“…Sustainability 2017, 9, 1444 3 of 11 [15][16][17] which is an undesirable effect. The present paper also investigates the oil-heated treatment, but with other kinds of oils, such as flax oil and sunflower oil.…”

Section: Mechanical Testsmentioning

confidence: 99%

“…When the treatment duration increases, the mechanical strengths could decrease from 15 to 58% of the initial strength, depending on each treatment Sustainability 2017, 9, 1444 3 of 11 procedure and each mechanical property. On the other hand, the treatments usually lead to the color changes [8], [15][16][17] which is an undesirable effect. The present paper also investigates the oil-heated treatment, but with other kinds of oils, such as flax oil and sunflower oil.…”

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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The Effects of Thermal Modification on the Properties of Two Vietnamese Bamboo Species, Part I: Effects on Physical Properties

Cited by 43 publications

References 21 publications

Effects of Acid Dye on the Performance of Bamboo-based Fiber Composites

Effects of Acid Dye on the Performance of Bamboo-based Fiber Composites

Effects of Thermal Modification on the Properties of Two Vietnamese Bamboo Species. Part II: Effects on Chemical Composition

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

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