Interlaminar fracture toughness and conductivity of carbon fiber/epoxy resin composite laminate modified by carbon black-loaded polypropylene non-woven fabric interleaves

Improved Interlaminar Fracture Toughness and Electrical Conductivity of CFRPs with Non-Woven Carbon Tissue Interleaves Composed of Fibers with Different Lengths

“…Compared with the baseline CFRPs laminates, after the incorporation of NWCTs with density of 7.8 mg/cm 2 , the in-plane electrical conductivity was increased by over 96% (Figure 7a), while the through-the-thickness electrical conductivity was increased by over 82% (Figure 7b). which are higher than that of CRRP interleaved by other carbon interleave materials such as black@PPNWF [18] and CNTs-doped polyamide [9] in the literature, as shown in Table 3, indicating excellent electrical conductivity of the NWCT with commercial short carbon fiber as for the conductive interleave in CFRPs laminate. Obviously, the increase in electrical conductivity is due to the connected conductive network of SCFs with high density (7.8 mg/cm 2 ) in the matrix between fabrics plies, evidenced by Figure 4a.…”

“…However, the data for the laminates with short Kevlar fibers shows a wider scatter due to the uneven distribution of the Kevlar fibers, which probably comes from the manually spread method. Recently various commercial polymer films have been utilized as interleaving materials in CFRPs, such as chopped aramid fibers [16], polyimide and polypropylene fibers [17], polypropylene nonwoven fabric [18], silk fibers interleave [19] and resulted in varied success in the toughness improvement of the composites. However, the incorporation of commercial interleaf with insulating or soft fibers will lead to the reduction of the electrical conductivity of the laminates and possible decrease in-plane strength and modulus of the laminates [16] due to the high electrical insulation and weak mechanical properties of the polymer material in nature.…”

Enhanced interlaminar shear and impact performance of woven carbon/epoxy composites interleaved with needle punched high performance polyethylene fiber nonwoven

“…40 Polypropylene nonwoven interleaves have been reported to increase the Mode-I initiation and propagation fracture toughness by 91.3% and 136%, respectively. 41 Similarly, nylon 6,6 nonwoven fabric has been reported to increase the Mode-I initiation and propagation fracture toughness of carbon fiber epoxy composites by 34% and 156%, respectively. 28 Interleaves made of high toughness materials can contribute to enhance interlaminar toughness of the composite laminates, 37 therefore, selection of the interleaves made of appropriate material is important.…”

“…28 Interleaves made of high toughness materials can contribute to enhance interlaminar toughness of the composite laminates, 37 therefore, selection of the interleaves made of appropriate material is important. 41 Ultra-High Molecular Weight Polyethylene (UHMWPE) or high-performance polyethylene (HPPE) fibers possess attractive properties, such as, high specific strength and modulus, low density, high elongation and energy absorption characteristics. Hu et al 42 developed composites using hybrid woven fabrics composed of continuous carbon fibers and UHMWPE fibers.…”

Toughening Behavior of Carbon/Epoxy Laminates Interleaved by PSF/PVDF Composite Nanofibers

“…On the other side, its highly crosslinked structure leads to brittleness and thus to poor resistance to crack propagation [1,2]. Among the several methods that have been presented during the years to increase the fracture toughness of carbon/epoxy laminates [3][4][5][6], interleaving polymers [7][8][9], in the form of particles, films, or nanofibrous mats [10][11][12][13][14][15][16], has proved to be one of the most effective. In particular, nanofibrous mats have been found to be a suitable choice because of their high porosity (which lead to rapid penetration of epoxy) and the strengthening effects they are able to provide.…”