Effect of alkali treatment on microstructure and mechanical properties of individual bamboo fibers

Chen, Hong; Yu, Yan; Zhong, Tuhua; Wu, Yan; Li, Yanjun; Wu, Zhihui; Fei, Baowei

doi:10.1007/s10570-016-1116-6

Cited by 152 publications

(79 citation statements)

References 50 publications

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“…The individual bamboo fibers were observed in Burker Icon atomic force microscope (CA, USA). The specimens were characterized using the same method described in our previous research [24]. Untreated individual bamboo fibers were characterized as control.…”

Section: Atomic Force Microscopementioning

confidence: 99%

“…Chemical composition, a lattice transformation from cellulose I to cellulose II, and mechanical properties of bamboo fibers changed differently according to the concentration of alkali treatment. In our previous study, the microstructure and mechanical properties of alkali-treated individual bamboo fibers were investigated [24]. When treated by alkali with higher concentration, microfibril aggregates in bamboo fiber changed from a randomly interwoven structure to a granular structure and cellulose I was transformed to cellulose II.…”

Section: Introductionmentioning

confidence: 99%

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Effect of alkali treatment on wettability and thermal stability of individual bamboo fibers

et al. 2018

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The aim of this study is to examine the wettability and thermal properties of individual bamboo fibers after alkali treatment. The individual bamboo fibers were treated by sodium hydroxide (NaOH) solution with varying concentrations (6, 8, 10, 15 and 25%) followed by freeze-drying treatment. The surface analysis of alkali-treated individual bamboo fibers was characterized by atomic force microscope. Water droplet on the individual fiber surface was observed with drop shaper analyzer and the contact angles on fiber surface were also measured. Thermal properties were further studied by thermogravimetric analysis. The results indicated that alkali treatment resulted in the increase in surface roughness of individual bamboo fibers. Alkali treatment with low NaOH concentration could enhance the wettability of treated individual bamboo fibers, and while the wettability was reduced with alkali treatment at high concentration (25%). Thermal analysis revealed that the onset of decomposition and the maximum decomposition were moved to higher temperature after alkali treatment at low NaOH concentrations (6, 8, and 10%), suggesting the improvement in the thermal stability of treated individual bamboo fibers, while the thermal stability was compromised after alkali treatment at higher concentrations (15 and 25%).

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Section: Atomic Force Microscopementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of alkali treatment on wettability and thermal stability of individual bamboo fibers

et al. 2018

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“…Therefore, hemicelluloses and other carbohydrates also degrade during processing. The effects of alkali concentration, treatment time and temperature on the chemical structure of fibers and their mechanical properties have attracted much attention [9][10][11][12]. Cellulose crystallinity in an alkali treatment has been found to be higher than that in a control sample [13].…”

Section: Introductionmentioning

confidence: 99%

Chemical Structure and Mechanical Properties of Wood Cell Walls Treated with Acid and Alkali Solution

Wang

Lin

2020

Forests

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The mechanical properties of individual fibers are related to the production and performance of papers and fiberboards. This paper examines the behavior of the microstructure constituents of wood subjected to acid and alkali treatments. The chemical structure and mechanical properties of wood cell walls with different acid or alkali treatments was analyzed. The results show that, compared with acid treatment, the crystal size and crystallinity index of cellulose increased after alkali treatment, resulting in an increase in the cell wall elastic modulus. The mechanical properties of the wood cell wall S2 region were higher than those of the compound middle lamella (CML) region. There was a topochemical effect between the CML and the S2 region in acid and alkali-treated samples, which provided a major threshold that facilitates the production/separation of wood fibers for better strength fiber properties.

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“…In essence, it is a type of non-uniform fiber reinforced gradient composite material. Bamboo softened, its plasticity is greatly improved, and the modulus of the fibers is much larger than that of the matrix material [10], and the fibers are arranged in parallel along the longitudinal direction, which makes it possible for bamboo to open fibers continuously under directional loading. As shown in Fig.…”

Section: A Principle Of Directional Fiber Opening Of Bamboomentioning

confidence: 99%

Mechanical Model of Directional Continuous Bamboo Fiber Opening

Zhang

Yao

2020

Preprint

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Based on the principle of directional continuous fiber opening of bamboo, the calculation model of the continuous beams in opening bamboo fiber is proposed.The continuous beam method is used to derive the moment equation of bamboo continuous fiber opening process. The mechanical model of bamboo directional continuous fiber opening is established, with the quantitative relationship found between the fiber opening parameters, e.g. the external load, the roll distance, the strength of the bamboo. The fiber opening test further verifies that the bamboo fiber opening model is correct .The research in this paper provides a theoretical basis for the precise control of directional continuous fiber opening of bamboo.

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Effect of alkali treatment on microstructure and mechanical properties of individual bamboo fibers

Cited by 152 publications

References 50 publications

Effect of alkali treatment on wettability and thermal stability of individual bamboo fibers

Effect of alkali treatment on wettability and thermal stability of individual bamboo fibers

Chemical Structure and Mechanical Properties of Wood Cell Walls Treated with Acid and Alkali Solution

Mechanical Model of Directional Continuous Bamboo Fiber Opening

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