Study of water sorption in modified flax fibers

• Published in: Journal of applied polymer science Vol. 101; no. 6; pp. 4281 - 4289
• Main Authors: Gouanvé, F., Marais, S., Bessadok, A., Langevin, D., Morvan, C., Métayer, M.
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 15-09-2006; Wiley
• Subjects: Applied sciences; autoclave; clustering; Exact sciences and technology; Fibers and threads; flax fibers; Forms of application and semi-finished materials; isotherm sorption; Park model; plasma; Polymer industry, paints, wood; Technology of polymers; water sorption kinetics; Heat treatment; Park model; Plasma assisted processing; Plant fiber; Mechanical properties; flax fibers; Experimental study; Property processing relationship; Modeling; Molecule scattering; water sorption kinetics; Flax fiber; Cold plasma; isotherm sorption; Autoclave; Natural fiber; Water absorption; clustering; Kinetics; plasma
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.23661

Because of their good mechanical properties and low density, natural fibers are more and more considered as reinforcement in composite materials. To improve the adhesion between the polymer matrix and natural fibers and to reduce the water sorption, helium cold plasma and autoclave treatments have been performed on flax fibers. The effect of these treatments on water sorption has been investigated by means of a gravimetric static equilibrium method (IGA). Water sorption isotherms have been deduced from kinetic data. Specific mathematical models have been tested to predict the water sorption isotherms of the treated flax fibers. The Park model based on the three sorption modes: Langmuir, Henry's law, and clustering, was successfully used to simulate the experimental sorption data. The results show no significant effect after plasma treatment while an increase of moisture resistance has been observed after autoclave treatment. This effect of autoclave treatment is interpreted in terms of modifications of cell‐wall structure. In a kinetic point of view, for the untreated and treated flax fibers, the variation of the diffusion coefficient with water concentration is in agreement with the three sorption modes of the Park model. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 4281–4289, 2006