Organic–inorganic interface enhancement for boosting mechanical and tribological performances of carbon fiber reinforced composites

Abstract

The limitation in the poor interface would severely affect the further development and application of carbon fiber reinforced composites (CFRP). Unique organic–inorganic hybrid architectures of MOF‐5‐NH2 and carboxymethyl cellulose (CMC) were established on the fiber/matrix interphase for promoting mechanical and tribological performances of the composites. The existence of above interfacial reinforced structure was in favor of generating abundant micromechanical interaction sites for enhancing mechanical interlocking. Meanwhile, high‐density chemical crosslinking networks played a positive role in elevating interfacial adhesion, further relieving stress concentration and hindering crack propagation. The tensile strength of CFRP‐2, CFRP‐3, CFRP‐4, and CFRP‐5 exhibited a significant rising of 27.18%, 30.64%, 27.75%, and 36.88%, respectively. The friction coefficient of MOF‐5‐NH2/CMC modified sample increased from 0.0953 to 0.1219, while the drop in the wear rate of the composites achieved 68.51%. This work provides an effective method for achieving the structure–function integrated design of composite materials according to the organic–inorganic interface enhancement of MOF‐5‐NH2/CMC.

Tribological Properties of Polyimide Composites Modified with Diamondoid Metal–Organic Frameworks

“…When the MOFs were added to the polyimide matrix, the running-in time was shortened and the fluctuation in the friction curve was abated, except for with 1 wt.% MOFs/PI composite. This variation in friction behavior was related to the fact that the organic-inorganic interface structure of the MOFs/PI was conducive to alleviating asperity deformation and enhancing the friction stability of the composites [ 30 ]. It is worthy of noting that it took only 700 s for the composites with 3 wt.% MOFs to reach the steady state, which can be attributed to the accelerated formation of stable transfer films induced by the MOFs [ 23 ].…”

The enhanced tribological performance of fabric‐reinforced resin composites by biomimetic surface modification of fillers

“…With the rapid development of technology and growing complexity of practical application conditions, the performance requirements for friction pairs have gradually increased, urging the modification of fabric‐reinforced polymeric matrix to further improve their tribological properties. The tribological properties of fabric‐reinforced polymer composites are restricted by weak interfacial adhesion due to their surface inertness and lack of reactive groups 12–15 . Therefore, toward improving the performance of fabric‐reinforced polymer composites, it is essential to strengthen the interfacial bonding between the fabric and the resin matrix.…”