Effect of multi-walled carbon nanotube on the electrical, morphological and mechanical properties of polypropylene/nickel-coated carbon fiber composites

Abstract

The electrical, morphological and rheological properties of melt-and dry-mixed composites of polypropylene (PP)/nickel-coated carbon fiber (NCCF) with multi-walled carbon nanotubes (MWCNTs) was investigated. Melt mixed PP/NCCF/MWCNT composites were prepared by mixing the materials with a twin screw extruder. From the results of the electrical conductivity of the PP/NCCF/MWCNT composites, the MWCNTs increased the electric conductivity of the PP/NCCF composites appreciably. A higher aspect ratio of MWCNTs can increase the conductivity of PP/NCCF composites in a polymer matrix compared to the composites without the MWCNTs. The tensile and flexural strengths of the PP/NCCF/MWCNT composites were higher than the composites without MWCNTs. This is might be due to the reinforcing effect of the well dispersed MWCNT in the PP matrix. The results of electrical, morphological and mechanical studies indicate that the MWCNTs increased the electrical conductivity and mechanical strength of the PP/NCCF composites.

Super-Compression-Resistant Multiwalled Carbon Nanotube/Nickel-Coated Carbonized Loofah Fiber/Polyether Ether Ketone Composite with Excellent Electromagnetic Shielding Performance

“…We have modified the carbonized loofah fiber by electroless plating a layer of nickel particles on its surface to enhance its strength and electrical conductivity . In addition, in order to synergize the nickel-plated carbonized loofah fiber to build a strong interconnected network to ensure the effective shielding effect of the composite, we chose carbon nanotubes as the filler, owing to its good electrical conductivity, thermal stability, and prominent aspect ratio. , Moreover, the carbon nanotubes were well-dispersed in the matrix by means of an ultrasonic cell pulverizer. The preparation of conductive polymers by an environmentally friendly, simple, inexpensive, and efficient method has yielded excellent shielding performance and thermal stability.…”

Development and characterization of surface functionalized hierarchical carbon fiber reinforced hybrid polypropylene composites

“…For an apple-to-apple comparison, the MFI of the PP used should be identical. Nonetheless, comparing composites having PP with MFI of 11 g/min, 40 PP/8f-CF still exhibits a higher strength, as observed in Table 3.…”

Microinjection molding of microsystem components: new aspects in improving performance

“…However, with the addition of various fillers, the morphology and corresponding performance of the microparts became more complex and will need further investigation. In this specific aspect, further research will focus on improving the interfacial interaction between the fillers and matrix [199], characterizing the distinct morphology evolution of the composites, and tailoring the micropart morphology according to the desired properties for specific applications. For instance, microfluidic devices with particular functions such as permeability for selected fluids in medical applications may be fulfilled using the polymer blending technology in μIM, which is still an open issue.…”