Influence of different surface treatments on the interfacial adhesion of graphene oxide/carbon fiber/epoxy composites

In Situ Fabrication of Branched TiO2/C Nanofibers as Binder‐Free and Free‐Standing Anodes for High‐Performance Sodium‐Ion Batteries

“…It could be observed that the peaks of CO and CO shifted to higher values. This was mainly due to that the acid treatment process may introduce an increase in fiber surface energy, and the exposure of TiO 2 leading to the decrease of carbon on the surface for BT/C NFs, which was in accordance with O 1s spectrum.…”

“…As shown in Figure S5 (Supporting Information), all of the characteristic peaks in the FT‐IR spectrum were the same except for the peak located at 1715 cm −1 which was assigned to COOH. This illustrated that acid treatment enhanced the hydrophilicity of the T/C NFs . The hydrophilicity was further confirmed by contact angle testing.…”

“…However, after acid treatment, the contact angle reduced to nearly 0°, indicating that the fiber after acid treatment can be soaked by water completely. Moreover, acid treatment could partially etched the microstructure of the fiber surface, resulting in the exposure of TiO 2 by spalling of some amorphous carbon particles, which was beneficial for the alkali hydrothermal treatment. Figure S7 (Supporting Information) shows the morphologies obtained at different hydrothermal treatment times at 120 °C.…”

Surface Modification of Bamboo Fibers to Enhance the Interfacial Adhesion of Epoxy Resin-Based Composites Prepared by Resin Transfer Molding

“…It is worth noting that NaOH treatment effectively modified the microstructure of BFs due to hydrolysis and peeling reactions. The increased surface roughness facilitated the mechanical interlocking between BFs and EP matrix [15,41]. The mechanical strength of the 2 wt.% NaOHmodified BFs/EP composite is better than that of the untreated, which shows that the hydrogen bonding interaction is the main factor to improve its interface properties.…”

“…One should note that KH550 treatment resulted in strong chemical bonding between BFs and EP matrix (mechanism as shown in Figure 3). In addition, the layered agglomerates on BFs surface improve the surrounding contact region and enhance the molecular interaction between BFs and EP matrix [41]. Consequently, compared with the hydrogen bonding, the strong chemical bonding of two-phase polymer effectively enhances the mechanical properties of the composite.…”