Effects of different thermal modification media on physical and mechanical properties of moso bamboo

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

doi:10.1016/j.conbuildmat.2016.04.156

Cited by 107 publications

(59 citation statements)

References 14 publications

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“…Taken together, our results revealed that EPT and SHT contribute to increase extractives contents of bamboos. Our findings are consistent with reported previously that thermal treatment affects the fundamental chemical properties of plantation woods and moso bamboo [20,21]; heating treatment wood and bamboo could increase the amounts of extractives. Candelier and his coworkers attributed changes in chemical composition of wood to thermal degradation of polysaccharides under high-temperature heat treatment [22].…”

Section: Extractives Contentsupporting

confidence: 93%

Effects of peeling and steam-heating treatment on basic properties of two types of bamboo culms (Phyllostachys makinoi and Phyllostachys pubescens)

Chung

Wang

2017

J Wood Sci

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Epidermal peeling (EPT) and steam-heating (SHT) treatments are two widely processing methods in bamboo industry. Moso bamboo (Phyllostachys pubescens Mazel) and makino bamboo (Phyllostachys makinoi Hayata) are important economical bamboo species in Taiwan and China. The subject of this study was to access the changes of chemical and mechanical properties in moso and makino bamboo culms, which were collected from Taiwan and China after EPT and SHT. As regard to chemical properties, the amounts of extractives and ash were increased both in moso and makino bamboos after EPT and SHT. In contrast, the contains of holocellulose and a-cellulose were decreased after EPT and SHT for two bamboos. Moso bamboo collected from China contained the lowest cellulose content but the highest amount of hemicellulose by SHT. The lignin contents of all samples were no significant different after SHT, and it might due to the structure of lignin did not destroy at 120°C. For the mechanical properties, the density of all makino and moso bamboo samples was reduced after SHT; moreover, the decreasing trend of density was similar to the reducing of holocellulose, a-cellulose, hemicellulose, and equilibrium moisture content (EMC). All bamboo samples without EPT presented the highest modulus of elasticity (MOE) and modulus of rupture (MOR) whether SHT or not. Both MOE and MOR of all bamboo samples were decreased after SHT. The integrity of the bamboo skin is important for the dimensional stability of the bamboo, and the water absorption ability would be increased after EPT; however, SHT decreased the water absorption of bamboo.

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Section: Extractives Contentsupporting

confidence: 93%

Effects of peeling and steam-heating treatment on basic properties of two types of bamboo culms (Phyllostachys makinoi and Phyllostachys pubescens)

Chung

Wang

2017

J Wood Sci

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“…2,8 Bamboo is impregnated with some chemical preservatives that are also used for wood and have harmful effects on human health and environment. 9 However, the impregnation of bamboo with these preservatives is not always efficient, because bamboo is not impregnated easily and its impregnability is quite low. 6,7 Heat treatment is an effective method that increases the durability of wood, reduces hygroscopicity, improves its dimensional stability, changes its chemical structure and physical properties, and has been known for a long time.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, after heat treatment, some research on the changes in the chemical, physical, mechanical structures of bamboo, and the resistance of bamboo against fungi and termites have also been reported by many researchers. 7,9,10,[12][13][14][15][16][17][18][19][20][21][22] But, there is a limited information about the effects of heat treatment on the surface properties of bamboo in the literature. Changes in the properties of bamboo after heat treatment process are very important for the use of bamboo.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the colorimetric parameters and mass loss of heat‐treated bamboo: Comparison of multiple linear regression and artificial neural network method

Gürgen

Topaloğlu

Ustaömer

et al. 2019

Color Research & Application

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In this study, the colorimetric parameters (L*, a*, b*) and mass loss of heat-treated bamboo were investigated, and the obtained results were modeled by using two methods: multiple linear regression (MLR) and artificial neural network (ANN). First, bamboo samples were exposed to heat treatment at different temperatures (110 C, 140 C, 170 C, and 200 C) and durations (15,30, 45, 60, 75, 90, and 115 minutes) in a laboratory oven. Then, the colorimetric parameters (L*, a*, b*) and mass loss of each sample were measured after each period of heat treatment.All data were modeled by using two methods separately for each parameter and the performances of these proposed methods were compared. It was found that color change and mass loss increased with increasing temperature and duration of heat treatment. Mean absolute percentage error (MAPE) values of all obtained MLR ranged from 0.64% to 10.63%, while the all MAPE values of ANN were found to be lower than 1.5%. Based on these results, it can be said that MLR and ANN could be used to evaluate the changes on the selected properties of heattreated bamboo samples. On the other hand, it should be emphasized that the ANN gave more accurate results than the MLR method because of its learning capability. K E Y W O R D Sartificial neural network, bamboo, colorimetric parameter, mass loss, multiple linear regressions

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“…Many efforts have been made to keep bamboo from splitting, cracking, and deforming. Heat treatment has been extensively researched and widely used to improve the dimensional stability of bamboo (Meng et al 2016;Yang et al 2016;Nishida et al 2017). The pretreatment of bamboo with polyethylene glycol can lower the risk of cracks both under room temperature and higher drying temperatures (Kang et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Improvement of Bamboo Properties via In Situ Construction of Polyhydroxyethyl Methylacrylate and Polymethyl Methylacrylate Networks

Wu¹,

Yang²,

Rao³

et al. 2017

BioResources

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The chemical modification of bamboo culm was explored based on in situ construction of polyhydroxyethyl methylacrylate (PHEMA) and polymethyl methylacrylate (PMMA) networks into the cell walls. Scanning electron microscopy revealed that the synthesized polymers distributed in both the cell walls and the lumen with the pits blocked. The dimensional stability was tested under three water soaking-drying and moistening-drying cycles. The swelling efficiency of the treated bamboo was under 8% in three cycles of water soaking and drying cycles and was 4% in moisteningdrying cycles. The anti-swelling efficiency was 60.5%, 52.7%, and 46.3%, respectively, in the moistening-drying cycles. Laboratory tests on mold resistance showed that no mycelium formed on the treated bamboo, while the untreated control was 100% covered by mold fungi.

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Effects of different thermal modification media on physical and mechanical properties of moso bamboo

Cited by 107 publications

References 14 publications

Effects of peeling and steam-heating treatment on basic properties of two types of bamboo culms (Phyllostachys makinoi and Phyllostachys pubescens)

Effects of peeling and steam-heating treatment on basic properties of two types of bamboo culms (Phyllostachys makinoi and Phyllostachys pubescens)

Prediction of the colorimetric parameters and mass loss of heat‐treated bamboo: Comparison of multiple linear regression and artificial neural network method

Improvement of Bamboo Properties via In Situ Construction of Polyhydroxyethyl Methylacrylate and Polymethyl Methylacrylate Networks

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