Influence of Roller Configuration on the Fiber–Matrix Distribution and Mechanical Properties of Continuously Produced, Mineral-Impregnated Carbon Fibers (MCFs)

Abstract

The article at hand is envisaged to enumerate significant technological parameters for the successful impregnation of carbon fiber rovings having 50,000 (50 K) filaments, each within a fine-grained, cementitious suspension. Parameters such as the number of rollers as well as the influence of roller deflection and rotation have been investigated and discussed with regard to the quality of the related impregnation and mechanical properties resulting therefrom. Morphological analysis disclosed distinct differences in the fiber matrix distribution, which are particularly reflected in the flexural performance of the mineral-impregnated carbon fibers (MCFs) produced. Moreover, with the best fiber matrix distribution, uniaxial tensile tests on MCFs demonstrated superior tensile strengths, moduli of elasticity, and elongations at rupture.

Analysis and Modeling of the System Boundaries of a High-Speed Direct-Yarn-Placement System for In Situ Impregnation of Carbon Fibre Heavy Tows as Textile Reinforcements for Concrete Parts

“…Research on yarn-laying head design showcases a diverse array of effector builds catering to specific impregnation needs. Traditional wet impregnation baths with multiple pins remain prevalent [21,[30][31][32][33]35,[38][39][40][41]43,44], offering versatility in impregnation.…”

Temperature-Dependent Pullout Behavior of Geopolymer Concrete Reinforced with Polymer- or Mineral-Impregnated Carbon Fiber Composites: An Experimental and Numerical Study

“…In fabrication, a continuous, automated processing line based on in situ pultrusion consisting of a five-roller-foulard system and additional equipment was applied, as detailed in previous investigations by the authors of refs and . In the first step, the unidirectional CF tow with a width of ∼19 mm was pulled by winding it onto a motor-driven wheel under constant tension, leveled, guided via a kiss-coater and suspension bath, and then shaped by a plastic, funnel-like nozzle with an opening diameter of 4.1 mm.…”

Durable Textile-reinforced Concrete Made of Fast-setting, Mineralimpregnated Carbon-fibers (MCF) Reinforcements and Alkaline-activated Matrix

“…Flexural strength of 8 MPa and compressive strength of 37 MPa were obtained from the test on specimens with dimensions of 10×10×60 mm³ for the impregnation matrix after curing by 50 ℃ for 16 hours and additional storage under 20 °C and 65% RH for 28 days. The fabrication of unidirectional MCF yarn was achieved via an automated, continuous pultrusion process, as described in (Liebscher et al, 2022). The carbon yarns were drawn at a 6 m/min velocity under constant tension and guided via a kiss-coater for pre-wetting and an impregnation bath including a five-roller-foulard and shaped by a conical nozzle with an inner opening diameter of 4.1 mm.…”