Elaboration by Wrapping Process and Multiscale Characterisation of Thermoplastic Bio-Composite Based on Hemp/PA11 Constituents

Abstract

The present work investigates the potential of developing bio-composites based on thermoplastic polymers reinforced with natural fibres by using hybrid yarns. The hybrid yarns were produced by the wrapping technique, in which a multifilament of polyamide 11 (PA11) was wrapped around an untreated low-twisted hemp roving to produce a yarn with sufficient tenacity and stiffness for the next step of weaving. The tensile behaviour of the wrapped yarns was identified both in the dry- and thermo-state. Then, two different fabrics were woven and tested to study the influence of yarn densities and weave diagrams on the tensile and flexural properties. At this fabric scale, properties of fabrics made from hybrid yarns were compared with those of fabrics from a previous study made from 100% hemp roving. Composites made from these fabrics, with stacking of two cross-plies, were produced by thermocompression and characterised regarding mechanical strength.

Accelerated Photo‐Oxidation of Polyamide 11 Nanocomposites under Various Clays Nanofillers

“…[ 4 ] In the family of polyamides, polyamide 11 (PA11) has attracted considerable interest as it is one of important commercial polymers, derived from a renewable resource (castor oil). [ 5 ] PA11 is an engineering thermoplastic, which offers excellent piezoelectricity, a low wear and abrasion, and a high chemical resistance. [ 6 ] However, PA11 has poor impact, tensile strength, and thermal properties.…”

Special Issue “Natural Fiber Based Composites”

“…A thermoplastic biocomposite based on hemp fibers and polyamide 11 (PA11) has also been developed through a three-step process, i.e., a wrapping operation to obtain 100% biosourced commingled yarns followed by their weaving to produce two different fabrics and then the molding through thermocompression, and the resulting composites, with stacking of two cross-plies, were characterized regarding mechanical strength [7].…”