Study on surface- and mechanical fiber characteristics and their effect on epoxy composite properties tuned by continuous anodic carbon fiber oxidation

Abstract

Continuous anodic oxidation was employed to alter the surface chemical properties of carbon bers. As expected, the wetting behavior by water improved and that of non-polar liquid diiodomethane deteriorated. The calculated surface tensions mirror the changes in the physicochemical surface properties. The zeta ( )-potential measurements performed also re ect changes in the surface chemistry of the investigated carbon bers. A correlation between the measured -potentials and the wetting behavior of water on anodically oxidized carbon bers was found. The in uence of anodic carbon ber oxidation on the epoxy composite properties was studied by a modi ed axial tensile test, which allows additionally the measurement of the so-called 'notching force' as a measure of the interfacial composite properties. Common model-composite samples were used to check the reliability of this test. The determined 'notching force' as a measure of adhesion correlates with the increased polar component of the ber surface tension.

Mechanical and physical performance of carbon aerogel reinforced carbon fibre hierarchical composites

“…Tg when compared to that of the baseline, attributed to the weak fibre/matrix interface and loss of interfacial functionalization [43].…”

Metal Mimics: Lightweight, Strong, and Tough Nanocomposites and Nanomaterial Assemblies

“…The interface strength in particular dictates the predominant deformation mechanism with strong interfaces (brittle fracture) and weak interfaces (pull-out) lead to differing behaviours in tension. 60 As such, control over the FRP toughness is most commonly performed at the interface (modifying shape, chemistry, or increasing interfacial-matrix volume) or dissipation of energy around the fibres e.g.…”

“…The failure of high-performance continuous FRP’s are driven by the failure of the fibers and the interface between the fiber-matrix. The interface strength in particular dictates the predominant deformation mechanism with strong interfaces (brittle fracture) and weak interfaces (pull-out) causing differing behaviors in tension . As such, control over the FRP toughness is most commonly performed at the interface (modifying shape, chemistry, or increasing interfacial-matrix volume/interphase) or by the dissipation of energy around the fibers, e.g., through lay-up or hybridization to reduce critical stress concentrations .…”

“…The interface strength in particular dictates the predominant deformation mechanism with strong interfaces (brittle fracture) and weak interfaces (pull-out) causing differing behaviors in tension. 60 As such, control over the FRP toughness is most commonly performed at the interface (modifying shape, chemistry, or increasing interfacial-matrix volume/interphase) or by the dissipation of energy around the fibers, e.g., through lay-up or hybridization to reduce critical stress concentrations. 12 In tension, the matrix in a continuous FRP composites does not provide a significant contribution to the overall properties.…”

Darkening Agent for Polyester Fabric

“…When the fabric is treated with the finishing agent emulsified with amino silicone, the resin is uniformly distributed to form a monomolecular layer-aligned film on the surface of the fiber [26], the silicon methyl group extends toward the outside, and the silicon-oxygen dipole bond and the polar amino group are directed to the inside of fiber interface [27,28]. The ammonia value of the finishing agent has a great influence on the morphological structure of siloxane chain during film formation [29].…”