Highly Tunable Interfacial Adhesion of Glass Fiber by Hybrid Multilayers of Graphene Oxide and Aramid Nanofiber

Abstract

The performance of fiber-reinforced composites is governed not only by the nature of each individual component comprising the composite but also by the interfacial properties between the fiber and the matrix. We present a novel layer-bylayer (LbL) assembly for the surface modification of a glass fiber to enhance the interfacial properties between the glass fiber and the epoxy matrix. Solution-processable graphene oxide (GO) and an aramid nanofiber (ANF) were employed as active components for the LbL assembly onto the glass fiber, owing to their abundant functional groups and mechanical properties. We found that the interfacial properties of the glass fibers uniformly coated with GO and ANF multilayers, such as surface free energy and interfacial shear strength, were improved by 23.6% and 39.2%, respectively, compared with those of the bare glass fiber. In addition, the interfacial adhesion interactions between the glass fiber and the epoxy matrix were highly tunable simply by changing the composition and the architecture of layers, taking advantage of the versatility of the LbL assembly.

Effect of Carbon Nanostructures and Fatty Acid Treatment on the Mechanical and Thermal Performances of Flax/Polypropylene Composites

“…A more recent approach deals with the grafting of nanostructures onto fiber surfaces to increase the adhesion with the polymer matrix. This strategy has been widely exploited for synthetic fibers, such as glass [21][22][23] and carbon fibers [24][25][26], but has attracted less attention in the field of natural fibers. Wang et al [27] modified the surfaces of flax fibers by grafting TiO 2 nanoparticles using a silane coupling agent.…”

Synergistic Strengthening and Toughening the Interphase of Composites by Constructing Alternating “Rigid‐and‐Soft” Structure on Carbon Fiber Surface

“…Observation of these nacre-like films indicates that the introduction of adequate reinforcing components and appropriate interfacial interactions over several distinct scales are keys affecting the mechanical properties. In addition, the LbL method has been employed to deposit graphene oxide (GO)/aramid nanofiber multilayers, [18] GO/SiO 2 multilayers, [19] and CNT coatings [20] on glass fiber or carbon fiber surface to improve interfacial adhesion of composites.Polydopamine (PDA) and other catechol compounds, due to their outstanding adhesive property and the role of providing platform for secondary reactions, are highly sought after being used to modify the inert surface of carbon fibers. [1,6,17] To manifest the critical characteristics of natural nacre, a LDH/poly(sodium-4-styrenesulfonate) nanostructured coating over the surface of glass fiber by LbL was reported by Luca et al, [8] which increased the interfacial shear strength (IFSS) and debonding toughness by 30% and 162%.…”

Bioinspired Design of LDH‐Based Mobile Building Materials with Enhanced Mechanical and Ultraviolet‐Shielding Performance

“…The whole process of making PTFE/MLDH/GF composites is divided into three steps. In step one, the glass fiber is pretreated to remove surfactant, which is calcined via the muffle furnace at 450 °C and immersed in the 5% NaOH solution for 5 min, and then the GF is dried for 30 min in an oven at 60 °C after being washed with deionized water. It is a remarkable fact that the tensile strength of glass fiber after being pretreated is significantly decreased to 123.02 MPa as reported in Figure S1, Supporting Information, which is due to the condition of high temperature .…”