Augmenting the wear performance of epoxy composites by different fillers: Synthesis of highly crystalline g-C3N4 by simple pyrolysis and recycling of carbon fibres from old aircraft composites

Deshmukh, Kavita A.; Chopra, Swamini; Khajanji, Pranjali; Gaidhani, Vishakha; Gopichand, Undeti; Gawande, Anjali; Turkar, Sakshi; Khodaskar, Falguni; Deshmukh, Abhay D.; Peshwe, D. R.

doi:10.1016/j.apsadv.2021.100125

Cited by 8 publications

(3 citation statements)

References 48 publications

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“…Carbon fibers (CF) are lightweight reinforcing fibers with high specific strength and stiffness but also with high energy demand during the production stage. Due to their excellent properties, they are widely used in demanding applications, such as in the aeronautic sector [ 1 , 2 ], the automotive industry [ 3 , 4 ], and construction [ 5 , 6 ], with both thermoset and thermoplastic matrices. Widespread production and use of CF inevitably leads to high amounts of CF composite waste.…”

Section: Introductionmentioning

confidence: 99%

Towards Sustainable Composite Manufacturing with Recycled Carbon Fiber Reinforced Thermoplastic Composites

et al. 2022

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Currently, the vast majority of composite waste is either landfilled or incinerated, causing a massive burden on the environment and resulting in the loss of potentially valuable raw material. Here, conventional pyrolysis and reactive pyrolysis were used to reclaim carbon fibers from aeronautical scrap material, and to evaluate the feasibility of using reclaimed carbon fibers in structural components for the automotive sector. The need for fiber sizing was investigated as well as the behavior of the fiber material in macroscopic impact testing. The fibers were characterized with the single fiber tensile test, scanning electron microscopy, and the microbond test. Critical fiber length was estimated in both polypropylene and polyamide matrices. Tensile strength of the fiber material was better preserved with the reactive pyrolysis compared to the conventional pyrolysis, but in both cases the interfacial shear strength was retained or even improved. The impact testing revealed that the components made of these fibers fulfilled all required deformation limits set for the components with virgin fibers. These results indicate that recycled carbon fibers can be a viable option even in structural components, resulting in lower production costs and greener composites.

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Section: Introductionmentioning

confidence: 99%

Towards Sustainable Composite Manufacturing with Recycled Carbon Fiber Reinforced Thermoplastic Composites

et al. 2022

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“…Epoxy resin (EP), as an important resin matrix, has been widely used in coatings, 1,2 electrical insulation, 3,4 adhesives [5][6][7] and composites [8][9][10] industries for its good mechanical properties, corrosion resistance and chemical resistance, excellent electrical properties, low shrinkage and excellent bonding properties. [11][12][13] Vacuum assisted resin transfer molding (VARTM) is widely used to manufacture large and EP-based composite materials with low cost and high efficiency. [14][15][16][17] In the meantime, curing agent is a critical component for shortening the curing speed of EP in a few minutes, which could improve the productivity.…”

Section: Introductionmentioning

confidence: 99%

Imidazole substituted benzothiadiazole derivatives as latent curing agent for epoxy thermosetting resin

Zhang

Guo

et al. 2022

J of Applied Polymer Sci

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As an important thermosetting resin, epoxy resin (EP) is widely used in the field of composite materials. Long storage time, rapid curing and low viscosity of one-component EP is ideal for preparing composite materials by vacuum assisted resin transfer molding (VARTM). For this sake, we developed and synthesized a new imidazole thermal latent curing agent, 4,7-diimidazol-2,1,3-benzothiadiazole (BTD-MZ 2 ) with a yield of about 75%. The curing behavior, thermal stability and storage time of the prepared EP system was studied by differential scanning calorimeter (DSC), thermal gravimetric analyzer (TGA), modular compact rheometer (MCR), respectively. DSC results showed that EP/17.5 wt% BTD-MZ 2 had a good latent period at low temperature, and can rapidly cure EP when heated to 150 C. TGA results show that BTD-MZ 2 promoted the formation of carbon residue and the residual carbon rate of EP/17.5 wt% BTD-MZ 2 is as high as 37.9%. MCR results show that the storage time of EP/17.5 wt% BTD-MZ 2 at 60 C can reach 850 min. In addition, it could play a role of catalyst used as co-curing agents with aromatic amines for EP. DSC test showed that the addition of 5 wt% BTD-MZ 2 reduced the activation energy of EP/4,4 0 -diaminodiphenylmethane (DDM) and promoted the curing reaction.

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“…7,8 As a result, several attempts have been undertaken to increase the epoxy resin's strength. 9 The major drawback of epoxy resins is that in the cured state they are brittle materials having fracture energies some of two magnitude lower than that of engineering thermoplastics and three magnitude lower than that of metal. 10 This inherent brittleness cause the poor damage tolerance to impact of the composites made from epoxy resin and poor peeling and shear strength of epoxy based matrices.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of augmented thermal, thermo-mechanical, mechanical properties of nano alumina reinforced TGDDM epoxy nanocomposites

Duraibabu

Rajarathinam²,

Muthukaruppan

2022

High Performance Polymers

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N,N′-Tetraglycidyldiaminodiphenyl methane (TGDDM) was reinforced with various weight fractions (0.5, 1, and 1.5 wt%) of amine functionalized nano alumina (F-Al) were cured with diaminodiphenyl-methane (DDM). FT-IR analysis revealed that formation of functionalized nano alumina (F-Al) structure, was brought about via coupling agent APTES. Furthermore, the morphology of TGDDM epoxy nanocomposites was studied using X-ray Diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), microscopic analysis and an atomic force microscope (AFM). We found a bonding relationship between TGDDM epoxy and F-Al in TGDDM/F-Al nanocomposites It was interesting to note that the values of tensile, flexural and impact strength of 1 wt% F-Al reinforced TGDDM epoxy nanocomposites were found to be 141.5, 192.5 MPa, and 92.4 J/m2, respectively., which resulted in a substantial improvement in the dynamic mechanical analysis (DMA) to 4.3 and 5.5 for 0.5 and 1 wt% F-Al reinforced TGDDM epoxy nanocomposites and the glass transition temperature (Tg) increased from 210°C to 225°C as the F-Al content increased. The initial degradation temperature (IDT) of 0.5, 1, and 1.5 wt% F-Al reinforced TGDDM epoxy nanocomposites were significantly enriched to 328°C, 345°C, and 335°C respectively from 290°C of neat (TGDDM) epoxy matrix. Likewise, the char yield for the neat (TGDDM) epoxy matrix was 13% and that for 0.5, 1, and 1.5 wt% F-Al reinforced TGDDM epoxy nanocomposites were 17%, 25%, and 20% respectively. It is feasible to state unequivocally that considerable F-Al diffusion within the TGDDM epoxy can only occur at low weight percentages. The results clearly showed that F-Al reinforced TGDDM epoxy nanocomposites may be investigated for advanced high performance industrial engineering applications.

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Augmenting the wear performance of epoxy composites by different fillers: Synthesis of highly crystalline g-C3N4 by simple pyrolysis and recycling of carbon fibres from old aircraft composites

Cited by 8 publications

References 48 publications

Towards Sustainable Composite Manufacturing with Recycled Carbon Fiber Reinforced Thermoplastic Composites

Towards Sustainable Composite Manufacturing with Recycled Carbon Fiber Reinforced Thermoplastic Composites

Imidazole substituted benzothiadiazole derivatives as latent curing agent for epoxy thermosetting resin

Evaluation of augmented thermal, thermo-mechanical, mechanical properties of nano alumina reinforced TGDDM epoxy nanocomposites

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