首页|Different characteristics in the hygroscopicity of the graded hierarchical bamboo structure
Different characteristics in the hygroscopicity of the graded hierarchical bamboo structure
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NSTL
Elsevier
Bamboo is mainly composed of fiber and parenchyma cells, and the gradient fiber distribution structure endows bamboo with excellent mechanical properties and improves its heterogeneity. Little is known about the real-time distribution and distribution mechanism of water on the gradient structure. In this study, the real-time moisture content of primeval bamboo with different density and proportions of fiber cells was tested. The mathematical models were used to calculate the content and distribution of adsorbed water in monolayered and multilayered bamboo and the differences in hygroscopicity of gradient structures were analyzed at cell level, sub-cellular level and molecular scale The results showed that microfibrillar aggregates of parenchyma cells differ at the subcellular scale, and parenchyma cells were more sensitive to changes in ambient humidity than fibers. When the humidity was higher than 40%, the moisture content of the different parts of bamboo differed considerably. When the humidity was 90%, the moisture content of the Inner, Middle, and Outer were 28.81%, 25.57%, and 18.55% respectively. And the adsorption isotherm were analyzed using the Hailwood-Horrobin (H-H) models. The monolayer moisture content in Inner was between 3.00% -3.50%. Under a high humidity, the multilayer adsorbed water content of Inner, Middle, and Outer reached 20.40-23.30%, 17.50-20.40%, and 14.60-17.00%.
NSTL
Elsevier
