Recycled carbon fiber filled polyethylene composites

Abstract

Composites of recycled carbon fiber (CF) with up to 30 wt % loading with polyethylene (PE) were prepared via melt compounding. The morphology of the composites and the degree of dispersion of the CF in the PE matrix was examined using scanning electron microscopy, and revealed the CF to be highly dispersed at all loadings and strong interfacial adhesion to exist between the CF and PE. Raman and FTIR spectroscopy were used to characterize the surface chemistry and potential bonding sites of recycled CF. Both the Young's modulus and ultimate tensile stress increased with increasing CF loading, but the percentage stress at break was unchanged up to 5 wt % loading, then decreased with further successive addition of CF. The effect of CF on the elastic modulus of PE was examined using the Halpin-Tsai and modified Cox models, the former giving a better fit with the values determined experimentally. The electrical conductivity of the PE matrix was enhanced by about 11 orders of magnitude on addition of recycled CF with a percolation threshold of 7 and 15 wt % for 500-lm and 3-mm thick samples.

Recycling of carbon fibers from carbon fiber reinforced polymer using electrochemical method

“…[1][2][3][4] due to improved mechanical, fatigue and corrosion resistance properties, and high strength-to-weight ratio offered by these composites [2]. However, the increasing use of CFRP also generates an increasing amount of CFRP waste [5].…”

“…The tensile strength of recycled carbon fibers obtained through this process is approximately 70-80% of virgin carbon fiber [15,16]. However, this process possibly deposits char on fiber surface and produces multiple hazardous gases [3,4,15,17]. The third type of recycling is based on the chemical process, where reactive medium (catalytic solutions, benzyl alcohol, and supercritical fluids, etc.)…”

Influence of carbon nanotube–polymeric compatibilizer masterbatches on morphological, thermal, mechanical, and tribological properties of polyethylene

“…Both theories assume that the filler is firmly bonded to the matrix, and the effect of the filler-matrix interface is not considered. The principles and details of the theories can be found in the literature [5,[26][27][28][29][30][31].…”

Rheological Behavior of Composites Based on Carbon Fibers Recycled from Aircraft Waste

“…Recycled carbon fibers reinforced thermoplastics and thermosets have a benefit of lower cost at substantially same properties as obtained with virgin carbon fibers based composites [2]. Recently, Kouparitsas et al [3] used a grinding and sifting procedure to recover carbon fibers from an epoxy/CF composite, which were then melt mixed (20 wt%) with ionomer (Surlyn ® 8528).…”

“…Mechanical as well as electrical measurements followed by morphological study of dispersion of polyethylene (PE) matrix filled with recycled CF obtained via thermochemical process from epoxy/CF composites used in Formula 1 motor racing cars were presented by McNally et al [2]. The tensile mechanical properties such as Young's modulus of PE increased from 258 MPa (0 wt%) to 724 MPa (30 wt%), and accordingly the tensile stress increased from 17.5 MPa to 22.3 MPa upon CF reinforcement.…”