A compendious review on fatigue properties of the bio‐nanocomposites

Abstract

In this present work, a review of fatigue strength on bio‐nano composites was presented. Generally, the biocomposites possessed higher fatigue strength than the conventional materials. Because the propagation in biocomposites can be arrested due to their internal structure, whereas the damages occur in the matrix and/or at the fiber/matrix interface region. In the case of conventional materials, the cracks would rapidly grow until a catastrophic failure occurs. Thus, the S–N curves of composites show a flatter curve when compared to the conventional materials. In terms of fatigue properties, conventional fiber‐reinforced composites (e.g., glass and carbon‐reinforced composites) were more extensively studied than bio‐based reinforced composites. Examining the fatigue properties of materials is significant for all engineering‐based applications. Because the fatigue failures can occur below the ultimate tensile strength of materials. However, the fatigue performance of the composites can be enhanced by improving the fiber‐matrix interfacial bonding resulting from surface treatment of fibers and incorporating nanofillers within the matrix, and so forth. Since the nanocomposites have a larger surface area and aspect ratio, they are preferred to use in many applications: aerospace, automotive, biotechnology, construction, and building, electronics, marine, and packing industries. Thus, this chapter starts with the unique advantages of bio‐nano composites. Then, the fatigue properties of bio‐nano composites, the significance of the S–N diagram, and the pattern of fatigue testing were discussed. In order to understand the fatigue behavior, several factors such as structure, fillers, fabrication techniques, and so forth were included. Challenges of fatigue strength of biocomposites were also summarized.

Recent advancement in surface modification of aramid fiber assisted by supercritical carbon dioxide

“…Inadequate adhesion behavior between inherently hydrophobic fabrics and printing material restricts the application of printing of mineral building materials. Numerous researchers have examined chemical and physical amendment methods for the improved inter laminar strength between fabric materials and around matrices, accomplishing, for example, enhanced pull‐out performance, dimensional stability, thermoplasticity, and wettability, which improve their adhesion and bonding with hydrophobic matrix 23–27 . In addition, outer layers modification methods such as electrophoretic deposition, air & ozone oxidation, acid–base grafting treatments, corona, fibrillation, rare earth treatment, gamma irradiation, plasma, and supercritical fluid alteration have been functional to enhance fiber–matrix interactions 3,28 .…”

“…Numerous researchers have examined chemical and physical amendment methods for the improved inter laminar strength between fabric materials and around matrices, accomplishing, for example, enhanced pull-out performance, dimensional stability, thermoplasticity, and wettability, which improve their adhesion and bonding with hydrophobic matrix. [23][24][25][26][27] In addition, outer layers modification methods such as electrophoretic deposition, air & ozone oxidation, acid-base grafting treatments, corona, fibrillation, rare earth treatment, gamma irradiation, plasma, and supercritical fluid alteration have been functional to enhance fiber-matrix interactions. 3,28 Wang and group 29 experiment using the silane coupling method to graft poly(catechol-polyamine) on the AF skin layer, which enhances pulloff force from 33 to 60 N and interfacial shear strength from 2.1 to 3.9 MPa.…”