Surface modification of Aramid fibers with new chemical method for improving interfacial bonding strength with epoxy resin

Abstract

Friedel-Crafts reaction was elected as the specific chemical approach to modify Aramid fiber surface in this article. After the surface treatment, the interfacial shear strength value of Aramid fiber/Epoxy composites was enhanced by about 50%. The surface elements of Aramid fibers were determined by X-ray photoelectron spectroscopy, whose results showed that the ratio of Oxygen/ Carbon was increased. The crystalline state of Aramid fibers was determined by X-ray diffraction instrument, and the surface morphological of Aramid fibers was analyzed by Scanning electron microscope. The results indicated that this novel surface treatment approach, which is a suitable way of the batch-process for Industrialization, not only can improve the interfacial bonding strength of Aramid fibers reinforced Epoxy resin matrix composites remarkably, but also hardly has any negative influence on the intrinsic tensile strength of Aramid fibers. The wettability degree of the fiber surface was enhanced by this new approach too.

Effect and origin of the structure of hyperbranched polysiloxane on the surface and integrated performances of grafted Kevlar fibers

“…About 70% of the total amount of PPTA fibers have been used to fabricate advanced polymer composites [7,8], however, the surfaces of PPTA fibers are very inert, they are not only difficult to be wetted by organic resins [9][10][11], but also have poor interfacial adhesion with the resin matrix [12,13], and consequently, the resultant composites could not have expected performance.…”

Effect of treatment pressure on structures and properties of PMIA fiber in supercritical carbon dioxide fluid

“…At present, various approaches of the modification for PMIA fiber have been adopted to change relatively inert polymer surfaces, including chemical treatment, plasma discharge, and even ultrasonic treatment . Nevertheless, some of these methods have constrained the practical use, and frequently lead to the decrease of the mechanical strength, elevated production cost, and complicated work procedures . Thus, there is an increasing demand for a novel modification method which can be applied easily and efficiently to PMIA fiber.…”

Effect of Surface Modification Process Conditions on Properties of Aramid Paper

“…Surface modification is an important way to improve the interfacial bonding strength of aramid fiber-reinforced composite materials. [10][11][12] It works by introducing hydroxyl groups, †…”