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Study of water absorption in Raffia vinifera fibres from Bandjoun, Cameroon.

Tagne NR, Njeugna E, Fogue M, Drean JY, Nzeukou A, Fokwa D - ScientificWorldJournal (2014)

Bottom Line: From the proposed model, the effective diffusion coefficient was deduced.The proposed model fitted better to the experimental data.In any cross section located along the stem of Raffia vinifera, it was found that the effective diffusion coefficient increases from the periphery to the centre during the initial and final phases.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Industrial and Systems Engineering Environment (LISIE), IUT/FV Bandjoun, University of Dschang, Cameroon ; Laboratory of Mechanics and Modeling of Physical System (L2MSP), University of Dschang, Cameroon ; Laboratory of Mechanics and Adapted Materials (LAMMA), ENSET, University of Douala, Cameroon.

ABSTRACT
The study is focused on the water diffusion phenomenon through the Raffia vinifera fibre from the stem. The knowledge on the behavior of those fibres in presence of liquid during the realization of biocomposite, is necessary. The parameters like percentage of water gain at the point of saturation, modelling of the kinetic of water absorption, and the effective diffusion coefficient were the main objectives. Along a stem of raffia, twelve zones of sampling were defined. From Fick's 2nd law of diffusion, a new model was proposed and evaluated compared to four other models at a constant temperature of 23°C. From the proposed model, the effective diffusion coefficient was deduced. The percentage of water gain was in the range of 303-662%. The proposed model fitted better to the experimental data. The estimated diffusion coefficient was evaluated during the initial phase and at the final phase. In any cross section located along the stem of Raffia vinifera, it was found that the effective diffusion coefficient increases from the periphery to the centre during the initial and final phases.

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Related in: MedlinePlus

Curve of the kinetics of water absorption of Raffia vinifera fibres located at the half radius after the base of the stem (PL-2/4-R2).
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Related In: Results  -  Collection


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fig3: Curve of the kinetics of water absorption of Raffia vinifera fibres located at the half radius after the base of the stem (PL-2/4-R2).

Mentions: Figure 3 presents the curves of the water gain ratio during absorption g(t), according to the time of Raffia vinifera fibres taken at the half radius of a cross section located at the base (PL-1/4-R2) and after it (PL-2/4-R2) along the stem.


Study of water absorption in Raffia vinifera fibres from Bandjoun, Cameroon.

Tagne NR, Njeugna E, Fogue M, Drean JY, Nzeukou A, Fokwa D - ScientificWorldJournal (2014)

Curve of the kinetics of water absorption of Raffia vinifera fibres located at the half radius after the base of the stem (PL-2/4-R2).
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3921971&req=5

fig3: Curve of the kinetics of water absorption of Raffia vinifera fibres located at the half radius after the base of the stem (PL-2/4-R2).
Mentions: Figure 3 presents the curves of the water gain ratio during absorption g(t), according to the time of Raffia vinifera fibres taken at the half radius of a cross section located at the base (PL-1/4-R2) and after it (PL-2/4-R2) along the stem.

Bottom Line: From the proposed model, the effective diffusion coefficient was deduced.The proposed model fitted better to the experimental data.In any cross section located along the stem of Raffia vinifera, it was found that the effective diffusion coefficient increases from the periphery to the centre during the initial and final phases.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Industrial and Systems Engineering Environment (LISIE), IUT/FV Bandjoun, University of Dschang, Cameroon ; Laboratory of Mechanics and Modeling of Physical System (L2MSP), University of Dschang, Cameroon ; Laboratory of Mechanics and Adapted Materials (LAMMA), ENSET, University of Douala, Cameroon.

ABSTRACT
The study is focused on the water diffusion phenomenon through the Raffia vinifera fibre from the stem. The knowledge on the behavior of those fibres in presence of liquid during the realization of biocomposite, is necessary. The parameters like percentage of water gain at the point of saturation, modelling of the kinetic of water absorption, and the effective diffusion coefficient were the main objectives. Along a stem of raffia, twelve zones of sampling were defined. From Fick's 2nd law of diffusion, a new model was proposed and evaluated compared to four other models at a constant temperature of 23°C. From the proposed model, the effective diffusion coefficient was deduced. The percentage of water gain was in the range of 303-662%. The proposed model fitted better to the experimental data. The estimated diffusion coefficient was evaluated during the initial phase and at the final phase. In any cross section located along the stem of Raffia vinifera, it was found that the effective diffusion coefficient increases from the periphery to the centre during the initial and final phases.

Show MeSH
Related in: MedlinePlus