Elevated temperature mechanical behavior of waste short carbon fiber incorporated glass fiber/epoxy composites

Abstract

The fabrication of carbon fiber-reinforced polymer composites generates vast amounts of waste carbon fiber. In the present work, these waste carbon fibers were added in varying contents (0.1, 0.3, and 0.5 wt%) to glass fiber/epoxy (GE) composite as short carbon fibers (SCFs) to improve its ambient and elevated temperature mechanical performance. The flexural and tensile behavior of the SCF modified GE composites were assessed at 30, 50, 70, and 110 C.The most significant improvement in mechanical performance was achieved by adding only 0.1 wt% of SCF into GE composite across most of the temperatures. At elevated temperatures, all the SCF-modified GE composites showed superior mechanical performance over the control GE composite. An important correlation between SCF content in GE composite and elevated temperature mechanical performance enhancement has been discussed. Differential scanning calorimetry was performed to understand the effect of SCF addition on GE composite's glass transition behavior. Fractography was conducted to study the various failure mechanisms at ambient and elevated temperatures.

Response of extreme environmental aging on the novel Moringa stenopetala husk fiber/epoxy composites: Understanding the characteristics and thermokinetic behavior

“…The nitrogen flow rate was kept constant at 200 mL/min. The optimum loaded samples (8-10 mg) were heated from ambient temperature to 800 C at different heating rates (5,10,20, and 40 C/min). The specimens were measured precisely (0.005 g) before being aged and subjected to characterization.…”

“…[ 4 ] In contrast, enormously efficient composites, such as synthetic fibers like nylon, glass, polyesters, metallic and carbon fibers, have a broad array of applications in industries such as household goods and aerospace. [ 5 ] Although, the issue with recycling and its need for significant amounts of energy sources like fossil fuels for operations cause environmental degradation on earth. The distinct properties of bio‐composites using natural fibers are superior to synthetic fibers in some determined situations, making them potentially more sustainably beneficial than glass or carbon fiber reinforced composites in significant applications.…”

Mode I and II interlaminar fracture toughness of glass/carbon inter‐ply hybrid FRP composites: Effects of stacking sequence and testing temperature

“…[30,[42][43][44] However, GF benefits from significantly lesser price, an important economic factor for mass production in industries. [36,45,46] Additionally, CF is developed from fossil fuels that are presently deliberated limited nonrenewable materials. Adopting a fiber hybridization technique might be feasible for minimizing the environmental impact and cost.…”

Enhanced interfacial and mechanical properties of glass fabric/epoxy composites via grafting silanized carbon nanotubes onto the fibers

“…14,15 The introduction of nanomaterials (e.g., clay, graphene) into GFRP to improve both interfacial adhesion and matrix properties has become a hot topic. [16][17][18][19][20][21] Li et al fabricated the graphene/carbon fiber (CF) hierarchical reinforcements by sizing deposition to improve the interfacial bonding. Compared to the untreated CF composites, the interlaminar shear strength (ILSS) and flexural strength of graphene-modified composites increased by 23.2% and 34.4%, respectively.…”

“…Such interfacial layer is conducive to stress transfer and dispersion, thus effectively restraining crack propagation 14,15 . The introduction of nanomaterials (e.g., clay, graphene) into GFRP to improve both interfacial adhesion and matrix properties has become a hot topic 16–21 . Li et al fabricated the graphene/carbon fiber (CF) hierarchical reinforcements by sizing deposition to improve the interfacial bonding.…”