In situ SAXS analysis of the water effects on the thickness evolution of nanocellulose within bamboo fiber

Ba, Ziyu; Chen, Guowei; Luo, Hongyun; Luo, Jian

doi:10.1007/s00226-020-01260-8

Cited by 6 publications

(1 citation statement)

References 23 publications

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“…However, the shoulder peak located at q = 0.1 Å −1 in Fig. 7b1 is associated with the aggregation structures of cellulose macromolecules, and a reduction in the corresponding SAXS intensities can be observed after 5 FTCs at -40℃, indicating the dispersion of cellulose macromolecules (Ba et al 2021). Further calculating the slopes of SAXS intensity-q curves (q less than 0.01 Å −1 ) yields the radius of gyration (R g ) and the grain size (L) of the nanocellulose crystal in the cell wall (SI) (Penttila et al 2013).…”

Section: Chemical and Crystal Structures Of Pf Adhesive And Cell Wall...mentioning

confidence: 93%

Disrupted cellulose aggregation leads to the reduced mechanical performance of wood–adhesive interphase during freeze–thaw cycles

Cao

et al. 2022

Cellulose

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The mechanical performance of wooden engineered composites facing the freeze-thaw cycles (FTCs) arises as an attention-worthy issue since the application of timber architectures in cold climates spreads. Here, we reported an investigation to reveal the losses of the mechanical performance of the wood-phenol formaldehyde (PF) adhesive interphase after the FTCs. Results revealed that PF adhesive was barely affected by the FTCs due to the low moisture content and rigid networks, whereas the mechanical properties of the cell wall in wood-PF interphase reduced signi cantly (more than 30%) after 5 FTCs at -40℃. Cracks were observed in the cell wall and compound middle lamella after FTCs. Further investigation into the crystal structure of the cell wall in the wood-PF interphase demonstrated that the FTCs disrupt the aggregations of cellulose macromolecules. The stresses caused by the phase transition of free water and the external hydrogen bonds formed between water and cellulose disrupted hydrogen bond networks in the cell wall. A plausible mechanism for the FTCs reducing the mechanical properties of the wood-PF bonds can be concluded as the cracks and weakened cell walls crippled the structural integrity of the wood-PF interphase, making it a fragile and stress-concentrated site when subjected to load.

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Section: Chemical and Crystal Structures Of Pf Adhesive And Cell Wall...mentioning

confidence: 93%

Disrupted cellulose aggregation leads to the reduced mechanical performance of wood–adhesive interphase during freeze–thaw cycles

Cao

et al. 2022

Cellulose

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Effect of moisture content on bamboo’s mode I interlaminar fracture toughness: The competition between promoting and impeding crack growth

Chen

Fei

et al. 2022

Construction and Building Materials

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Effects of moisture content and fibrous structure on the uniaxial compression behavior of natural bamboo

Chen,

Luo

2023

Construction and Building Materials

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In situ SAXS analysis of the water effects on the thickness evolution of nanocellulose within bamboo fiber

Cited by 6 publications

References 23 publications

Disrupted cellulose aggregation leads to the reduced mechanical performance of wood–adhesive interphase during freeze–thaw cycles

Disrupted cellulose aggregation leads to the reduced mechanical performance of wood–adhesive interphase during freeze–thaw cycles

Effect of moisture content on bamboo’s mode I interlaminar fracture toughness: The competition between promoting and impeding crack growth

Effects of moisture content and fibrous structure on the uniaxial compression behavior of natural bamboo

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