Effects of thermal modification on the surface and chemical properties of moso bamboo

Lee, Chih-Hsuan; Yang, Tsung Han; Cheng, Yongchun; Lee, Chia‐Ju

doi:10.1016/j.conbuildmat.2018.05.099

Cited by 110 publications

(57 citation statements)

References 40 publications

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“…The results of the chemical composition analysis indicated that the content of holocellulose and hemicellulose declined after heat treatment and kept on decreasing as rising the temperature ( Table 1). The relative content of -cellulose decreased slightly while that of lignin and extractives increased, which was consistent with the results reported by Lee et al [15]. Figure 1 shows the equilibrium moisture contents (EMC) of the samples at various humidities.…”

Section: Resultssupporting

confidence: 90%

“…Recently, thermal modification technology has also been used to improve the bamboo properties by using heat treatment of wood as reference. Some relevant research has been carried out in the past in terms of heat treatment process [15], color change and dimensional stability [16], mechanical property change [1,9,16], and durability of heat treatment [17]. Their results showed that the heat treatment is a green and environmentally friendly modification method.…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Heat Treatment on the Static and Dynamic Sorptive Behavior of Moso Bamboo (Phyllostachys pubescens)

Huang

Liu

Meng

et al. 2019

Advances in Polymer Technology

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The influence of heat treatment on moisture sorption behavior of moso bamboo (Phyllostachys pubescens), especially under dynamic sorption conditions, was investigated. Moso bamboo was heated to 180 and 200°C for 8 h to investigate the chemical components and sorptive behavior at sinusoidal relative humidity (RH) and constant humidity. The results of chemical components revealed that the content of holocellulose,α-cellulose, and hemicellulose decreased while that of lignin increased slightly with increasing treatment temperatures. The results of static adsorption at constant RH showed that 200°C treated bamboo exhibited the lowest moisture content and moisture sorption coefficient. The results of dynamic sorptive behavior indicated that the moisture content changed sinusoidally but lagged behind the triggering sinusoidal RH changes. Heat-treated bamboo presented greater phase lag and smaller amplitudes of moisture content and sorption hysteresis due to the hemicellulose removal.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

The Influence of Heat Treatment on the Static and Dynamic Sorptive Behavior of Moso Bamboo (Phyllostachys pubescens)

Huang

Liu

Meng

et al. 2019

Advances in Polymer Technology

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“…As the bamboo bundles are glued, they have different amounts of water-soluble phenolic resin applied, which leads to variations in the physical and mechanical properties of the bamboo bundle units/bamboo bundle veneers [6,11,14,15]. In order to reduce mold and increase the dimensional stability of bamboo scrimber, bamboo bundles are often subjected to high-temperature treatment, which can destroy the chemical structure of bamboo and affect its lignin and hemicellulose [16][17][18][19]. The physical and mechanical properties of the bamboo bundle units/bamboo bundle veneers changed due to the accuracy of the processing [20][21][22][23], as well as the surface density of the bamboo bundle veneers.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Uniformity of Bamboo Bundle Veneer and Bamboo Bundle Laminated Veneer Lumber (BLVL)

Zhou¹,

Wei²,

Smith

et al. 2019

Forests

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The lack of an effective and practical quality control method for industrialized bamboo bundle veneers is the key restriction in the application of bamboo bundle composite materials in the field of construction. In this work, the density uniformity and mechanical properties of bamboo bundle veneers were systematically evaluated by the combination of light transmittance and mechanical stiffness. It was found that the number of broomings, dippings, and high-temperature heat treatments had different effects on the bamboo bundle veneers. On this basis, the uniformity of the density and mechanical properties of the bamboo scrimber (BS) that underwent hybrid paving, and the bamboo bundle laminated veneer lumber (BLVL), were analyzed. The results showed that the performance stability of bamboo bundle composites could be greatly improved by bamboo bundle veneer laminated paving. A large-scale quality evaluation system for bamboo bundle veneers was established in this work, and it provides conditions for the manufacture of bamboo bundle composites with stable and controllable performance.

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“…When the treatment duration increases, the mechanical strengths could decrease by 15-58% from the initial strength, depending on each treatment procedure and each mechanical property [35]. On the other hand, some treatments lead to color changes [36,37], which is an undesirable effect [35].…”

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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Effects of thermal modification on the surface and chemical properties of moso bamboo

Cited by 110 publications

References 40 publications

The Influence of Heat Treatment on the Static and Dynamic Sorptive Behavior of Moso Bamboo (Phyllostachys pubescens)

The Influence of Heat Treatment on the Static and Dynamic Sorptive Behavior of Moso Bamboo (Phyllostachys pubescens)

Evaluation of Uniformity of Bamboo Bundle Veneer and Bamboo Bundle Laminated Veneer Lumber (BLVL)

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

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