Applying the Langmuir- Type Mass Transport Model on the Water Absorption in Vegetable Fiber Reinforced Polymer Composites: A Finite-Volume Approach

Melo, R.Q. da Costa; Santos, Wanessa Raphaella Gomes dos; Lima, Antônio Gilson Barbosa de

doi:10.20906/cps/cilamce2017-0713

Cited by 3 publications

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“…So, the use of vegetable fibers presents high potential in technological application due to its use as a substitute of synthetic fiber. The production of those fibers presents a great socioeconomic character, especially in Brazil, where they are produced by communities of the north and northeast regions 3 .…”

Section: Introductionmentioning

confidence: 99%

Study of the Moisture Absorption in Polymer Composites Reinforced with Vegetal Fiber Using Langmuir’s Model

2019

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This work aims to numerically study the moisture absorption in polymer composites reinforced with vegetal fiber, using the diffusive model of Langmuir, which considers the existence of water molecules inside the material free to diffuse and adsorb at the capillaries walls, in the solid. A threedimensional and transient mathematical modelling to describe the water absorption process by the composite and its numerical solution via finite volume method are presented and discussed. Results of the free solute concentration, entrapped solute concentration, local moisture content and average moisture content obtained at different instants of the process are presented and analyzed. It was verified that the concentration gradients of the molecules (free and entrapped) are higher at the material surface. In addition, as the concentration of free water increases, there is also an increase in entrapped water concentration within the material at any time of the process.

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Section: Introductionmentioning

confidence: 99%