Improved the interfacial characteristics of carbon fiber/polyamide 6 composites by synthesizing polydopamine rapidly on the carbon fiber surface with ultrasound-assisted

Tribological properties of differently shaped zinc‐based metal‐organic framework particles reinforced epoxy resin composites

“…35 A peak at 1625 cm À1 could be generated by C O stretching vibrations and primary amine N H bending vibrations; secondary amine' s N H deformation vibration peak emerges at 1510 cm À1 . 42 These indicate that the PDA on PTFE fibers was successfully loaded. The peak at about 1500 cm À1 is attributed to the C C stretching vibration of the aromatic ring in H 2 BDC; the peak at 835 cm À1 is an aromatic C H out-of-plane deformation vibration.…”

“…Due to the presence of PDA, more organic functional groups were introduced on PTFE/PDA fiber fabric, phenolic hydroxyl stretching vibration peak at 3440 cm −1 ; the small peak at 3140 cm −1 corresponds to NH stretching vibration of secondary amines, which means that a large number of primary amine groups (NH 2 ) in dopamine hydrochloride have converted to secondary amine groups (NH) 35 . A peak at 1625 cm −1 could be generated by CO stretching vibrations and primary amine NH bending vibrations; secondary amine’ s NH deformation vibration peak emerges at 1510 cm −1 42 . These indicate that the PDA on PTFE fibers was successfully loaded.…”

Development of a “Rigid-Flexible” Structure at the Interface Through Aramid Nanofibers@MXene to Enhance Mechanical Properties of Carbon Fiber/Polyamide Composites

“…1−3 As a high-performance thermoplastic resin matrix, polyamide (PA) exhibits unique thermal stability, elevated polarity, and moderate melt viscosity. 4 However, the interfacial bonding of CF/PA composites is weak due to the chemical inertness, hydrophobicity, and smooth graphite surface of CF. 5−7 Furthermore, the modulus difference between CF and PA seems enormous, making it difficult to construct an interface layer with gentle modulus transition, which will lead to stress concentration, resin peeling, and final interface failure.…”

“…Carbon fiber-reinforced thermoplastic composites (CFRTP) possess plenty of excellent properties, such as recyclability, thermal stability, high specific strength, low density, and so forth. They are widely favored in aerospace, transportation, and automotive. − As a high-performance thermoplastic resin matrix, polyamide (PA) exhibits unique thermal stability, elevated polarity, and moderate melt viscosity . However, the interfacial bonding of CF/PA composites is weak due to the chemical inertness, hydrophobicity, and smooth graphite surface of CF. − Furthermore, the modulus difference between CF and PA seems enormous, making it difficult to construct an interface layer with gentle modulus transition, which will lead to stress concentration, resin peeling, and final interface failure. , …”

Interfacial Strengthening of Carbon Fiber/Polypropylene Composites via a Modified Acrylate Nanoemulsion

“…Recent decades have seen a significant increase in composites being used in lightweight aircraft and helicopters, with Airbus A350 and Boeing 787 using more than 50% of composites overall in their construction. Despite the excellent availability of CF/PP composites, the poor interfacial bonding between CFs and PP is attributed to the chemically inert and nonpolar surface of CFs during carbonization and graphitization, leading to poor compatibility and weak adhesion between the CFs and the PP resin matrix. − Moreover, the PP resin matrix has the following disadvantages: low melt flow and poor polarity, resulting in poor wettability of the resin matrix, − which is a common problem with all thermoplastic matrixes. − Therefore, weak interfacial bonding may result in poor mechanical properties of the CF/PP composite.…”