Flax Fibre Yarn Coated with Lignin from Renewable Sources for Composites

Abstract

The present experimental work analyses the potential of lignin as a matrix for materials made from renewable resources for composite components and the production of hybrid semi-finished products by coating a flax fibre yarn. Natural fibres, due to their low density, in combination with lignin can be a new renewable source for lightweight products. For this purpose, the extrusion process was adapted to lignin as a matrix material for bio-based composites and coating of natural fibre yarns. A commercial flax yarn is the basis for the lignin coating by extrusion. Subsequently, the coated flax yarn was characterised with regard to selected yarn properties. In order to produce composite plates, the lignin-coated flax yarn was used as warp yarn in a bidirectional fabric due to its insufficient flexibility transversely to the yarn axis. The commercial flax yarn was used as weft yarn to increase the fibre volume content. The tensile and flexural properties of the bio-based composite material were determined. There was a significant difference in the mechanical properties between the warp and weft directions. The results show that lignin can be used as matrix material for bio-based natural fibre composites and the coating of natural fibre yarns is an alternative to spun hybrid yarns.

Bio-Based Polyurethane Foams for the Removal of Petroleum-Derived Pollutants: Sorption in Batch and in Continuous-Flow

“…Polyurethanes are a class of versatile materials that are widely used for environmental purposes [ 35 ]. They are generally made from fossil resources, but the introduction of new renewable chemicals in the production process represents the new era of this topic [ 36 , 37 ]. However, synthetic polyurethanes possess extraordinary stability and a low tendency to be degraded by natural and atmospheric agents [ 38 ].…”

Enhancing Dental Applications: A Novel Approach for Incorporating Bioactive Substances into Textile Threads

“…Post immersion, excess solution removal can be accomplished through mechanical squeezing [10] or drying procedures [11]. Alternatively, more sophisticated methods are available, including non-contact deposition techniques like drop coating [12], spray coating [13][14][15], ink-jet coating or printing [16,17], coaxial nozzle coating [18], plasma and ionized gas deposition [19], or electrostatic spinning [20][21][22]. Furthermore, active agents can be introduced into the textile yarns through contact deposition, employing coating principles [23].…”

Advances in Sustainable Polymeric Materials

“…Möhl et al [18] provided a comparative study of using lignin-based thermoplastic on commercial flex yarn to improve the tensile properties compared to the flex yarn itself.…”