Materiales compuestos de fibras naturales y polímero reciclados: mezclas, pretratamientos, agentes de acople y propiedades mecánicas - Una revisión

Abstract

This study provides a bibliographic review about composite materials made from recycled polymers and natural fibers, in order to identify some of the existing mixtures and the influence of variables such as fiber loading, pretreatment, use of coupling agents and fiber size in the resulting mechanical properties of the composites. It was identified that the most suitable fiber proportion so that the mechanical properties improve varies from 15% to 40% by weight; furthermore, that pre-treatments such as NaOH and coupling agents derived from maleic anhydride improve the interfacial bond between the matrix and the fiber, resulting in better mechanical properties. Likewise, it was evidenced that properties such as tensile strength, tensile modulus, flexural strength, flexural modulus and impact resilience improved with the addition of fiber up to 40% by weight, while impact resistance, tension due to deformation at break and elongation followed the trend of not improving with the addition of fibers. In addition, a correlation between fiber sizes and mechanical properties was performed in search of a trend, but since the tests were carried out under different conditions, it was not possible to make an ideal comparison for these combinations.