Improvement of interfacial adhesion for plasma‐treated aramid fiber‐reinforced poly(phthalazinone ether sulfone ketone) composite and fiber surface aging effects

Abstract

Interfacial adhesion between the fiber and the matrix in a composite is a primary factor for stress transfer from the matrix to the fiber. In this study, oxygen plasma treatment method was applied to modify the fiber surface for improving interfacial adhesion of aramid fiber-reinforced poly(phthalazinone ether sulfone ketone) (PPESK) composite. Composite interfacial adhesion properties were determined by interlaminar shear strength (ILSS) using a short-beam bending test. The composite interfacial adhesion mechanism was discussed by SEM. The changes of chemical composition and wettability for plasma-treated fiber surfaces stored in air as long as 10 days were investigated by XPS and dynamic contact angle analysis (DCAA), respectively. Results indicated that oxygen plasma treatment was an effective method for improving interfacial adhesion; plasma-treated fiber surface suffered aging effects during storage in air.

Effects of Twaron fiber surface treatment by air dielectric barrier discharge plasma on the interfacial adhesion in fiber reinforced composites

“…However, interfacial adhesion of thermoplastic composites reinforced by organic fiber is usually weak, weakening the transfer behavior of the loads from matrix to fiber. As for aramid fiber, to a great extent, the chemical inertness and smooth surface may account for the lack of chemical and mechanical bonding between fiber and matrix, which makes the fiber surface modification a necessary technology, like non-thermal plasma treatments [3][4][5].…”

Effects of oxygen plasma treatment on domestic Aramid fiber III surface properties

“…Surface free energy are calculated by equations in Ref. [7] It is found that the contact angles of water decreases from 70.30°to 37.23° and the contact angles of DIM increases from 30.96° to 57.64°after oxygen plasma treatment. Figure 4 illustrates …”

“…However, because of its smooth and chemical inert fiber surfaces, which limit its application in composite system [3] Thus, it is necessary to modify the fiber surface. Compared with some other modification methods, such as chemical and physical methods, low temperature plasma treatment offers several advantages such as the selection modification of only the outer atomic layers of the substrate, the selection of the desired functional groups and the minimization of thermal degradation and so on [4][5][6][7] . The aim of this work is to investigate the effects of oxygen plasma treatment on domestic aramid fiber III surface properties.…”

Synthesis and characterization of the novel meta‐modified aramid fibers with liquid crystalline properties

“…Therefore, it is necessary to study surface modification methods to improve the interfacial adhesion strength between aramid fibers and the matrices. At present, various approaches of the surface modification for aramid fibers have been adopted, including physical treatments [3–8], chemical treatments [9–16], and the combination of the two approaches [17, 18].…”