Effects of plasma treatment of carbon fibers on interfacial properties of BMI resin composites

Abstract

High performance continuous fiber surface modification by inductively coupled RF plasma (ICP) and dielectric barrier discharge (DBD) low temperature plasma were conducted. X-ray photoelectron spectroscopy (XPS) and other analytical testing methods systematically studied plasma treatment time, discharge power, discharge pressure, etc, on fiber surface state, surface composition, and surface shape changes in the appearance and wetting properties. The results show that after plasma treatment the surface of the fiber is grafted with a large number of polar functional groups such as carboxyl groups and hydroxyl groups. The surface roughness increases, the surface free energy increases, and the fiber wetting property is significantly improved, resulting in improvement in interlaminar shear strength (ILSS) between the fiber and the resin matrix. Finally, the surfaces of the fibers and its relationship with interfacial properties of fiber reinforced bismaleimide composites are also discussed. KEYWORDS carbon fiber, impact toughness, interface/interphase, polymer matrix composites (PMCs)

Enhanced properties of PAN‐derived carbon fibres and resulting composites by active screen plasma surface functionalisation

“…Extensive research has been conducted on the physico‐chemical interaction between CFs and the matrix, [ 4–6 ] and a range of surface‐engineering methods have been studied with the aim to enhance CF/substrate interfacial strength, such as chemical/electrochemical oxidation, plasma treatment, polymer grafting, sizing and nanoparticle coating. [ 3,7–12 ] All these techniques aim to modify the surface morphology of CFs, to introduce new chemical groups to the CF surface, and to change the surface free energy and hence improve the CF/matrix interfacial bonding.…”

Plasma-Enhanced Alginate Pre-Treatment of Short Flax Fibers for Improved Thermo-Mechanical Properties of PLA Composites

“…Conversely, the flax-alginate 100% DC sample experiences a more substantial increase in the C1s peak, which may be attributed to a degradation as suggested in the OES section. This degradation could be related to the conversion of carbon into CO 2 , leading to a significant decrease in the O/C ratio [47]. Additionally, a trend at 287.6 eV, associated with the C=O bond, suggests the presence or enhancement of carbonyl groups.…”

A review about the fluorination and oxyfluorination of carbon fibres

“…Treatment are therefore mainly devoted to cleaning the surface by removing the impurities, creating a surface roughness to improve the mechanical anchorage of the resin, or the chemical grafting on the fibre surface to create chemical interactions between the fibres and the matrix [42]. Thereby, as an example, some researchers have demonstrated that plasma treatment of carbon fibres allows the surface roughness of fibres to be increased and, consequently, enhances their adhesion with polymers [43][44][45]. Some others have carried out experimentations that aim at grafting chemical groups at the outmost surface of carbon fibres.…”