Novel Insight into the Intricate Shape of Flax Fibre Lumen
نویسندگان
چکیده
Plant fibres and especially flax can be distinguished from most synthetic by their intricate shape intrinsic porosity called lumen, which is usually assumed to tubular. However, the real appears more complex thus might induce stress concentrations influencing fibre performance. This study proposes a novel representation of lumen its variations along fibre, an interpretation origin effect on tensile properties. investigation was conducted at crossroads complementary characterization techniques: optical scanning electron microscopy (SEM), high-resolution X-ray microtomography (µCT) mechanical tests cell-wall scale atomic force (AFM) in Peak-Force Quantitative Nano-Mechanical property mapping (PF-QNM) mode micromechanical testing. Converging results highlight difficulty drawing single geometric reference for lumen. AFM depict central cavities different sizes shapes. Porosity contents, varying 0.4 7.2%, are estimated µCT. Furthermore, size reported fibres. originate cell wall thickening death but particular attention should also paid effects post mortem processes such as drying, retting extraction well sample preparation. Finally, SEM observation following testing demonstrates combined geometrical inhomogeneities defects drive failure fibre.
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ژورنال
عنوان ژورنال: Fibers
سال: 2021
ISSN: ['2079-6439']
DOI: https://doi.org/10.3390/fib9040024