High strength and light weight polyamide 6/carbon fiber composite foams for electromagnetic interference shielding

Abstract

In this study, high strength and light weight polyamide 6/carbon fiber (PA6/CF) composite foams were prepared by chemical injection foaming method. The foaming performance, electromagnetic interference (EMI) shielding efficiency total(SE T ), and mechanical properties of PA6/CF composite foams with different CF contents were investigated. The results show that the shear viscosity and strain hardening behavior obvious increased with the augment of CF content, which helped to PA6/CF composite foams to take the cell structure with smaller size, greater density, and more regular morphology.PA6/CF composite foam with cell size of 56.8 μm, and cell density of 1.81 Â 10 6 cells/cm 3 was achieved at 22 wt% CF. Meanwhile, PA6/CF composite foam had good EMI SE T , at 22 wt% CF addition. The specific EMI SE T of PA6/CF composite foam is 36.6 dB, 27.6% higher than that of solid 26.5 dB, the excellent cell structure helps to improve the EMI SE T . In addition, PA6/CF composite foams also had excellent mechanical properties. Therefore, PA6/CF composite foams had broad application prospect in EMI shielding materials field, combining the advantages of simple preparation process, light weight and EMI shielding.

Enhancing the foaming properties of polypropylene/basalt fiber composites by altering their rheological and crystallization behavior via polyethylene–octene blending modification

“…POE (8842, MFR: 1 g/10 min [190°C/2.16 kg]) was obtained from Dow Chemical Company. The foaming agent is consistent with the one used in previous literature 30 …”

“…Then, the frequency sweep test was carried out at 175°C, and the dynamic performance of each sample was measured in the frequency range of 0.1–100 rad/s under the condition of a given strain amplitude of 0.1%. At least two parallel experiments were performed for each sample group 30 …”

Investigation of structure–flexural response relations in thermoplastic carbon/glass fiber‐metal laminates

“…22,23 Therefore, the continuous glass fiber-reinforced PP (PP/GF) and carbon fiber-reinforced PA6 (PA6/CF) are excellent candidates for the development of thermoplastic fiber-metal hybrid laminates. [24][25][26] In general, metal sheets possess better ductility while the fiber-reinforced composite layers show a higher strength. As a consequence, different material characteristics influence the mechanical performance of the thermoplastic-metal reinforced laminates.…”

“…Thermoplastic resins including polypropylene (PP) and polyamide 6 (PA6) have been extensively used as automobile materials with low material cost, recyclability, and high molding efficiency 22,23 . Therefore, the continuous glass fiber‐reinforced PP (PP/GF) and carbon fiber‐reinforced PA6 (PA6/CF) are excellent candidates for the development of thermoplastic fiber‐metal hybrid laminates 24–26 . In general, metal sheets possess better ductility while the fiber‐reinforced composite layers show a higher strength.…”

Polyaniline-Based Ink for Inkjet Printing for Supercapacitors, Sensors, and Electrochromic Devices

“…Similarly, epoxy-graphene hybrid nanocomposites show an increase in EMI shielding as the amount of PANI increases [38], while polyaniline and vanadium pentoxide nanocomposites not only exhibit good electromagnetic interference shielding but are also great corrosion inhibitors [39]. Various nanomaterials in the PVA-PEDOT matrix have microwave-absorbing properties [40], and the polyamide 6/carbon fiber (PA6/CF) composite also exhibits good EMI shielding properties [41]. An interesting application of conductive polymers is their use in the preparation of Janus fibers, which are multifunctional.…”