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Carbon Fiber - Europe PMC

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Last Updated: 10 September 2022

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Tunable force sensor based on carbon nanotube fiber for fine mechanical and acoustic technologies.

The design of new smart prosthetics or robotic grippers gives a major boost to low-cost manufacturing and rapid prototyping force sensing systems. We review piezoresistive force sensors based on carbon nanotube fibers fabricated by a new wet pulling method in this paper. We have demonstrated the applicability of the designed unit in tactile sensing, displacement estimation, and nanophone vibration monitoring system, as well as the force sensing characteristics, i. e. g. , the developed sensor suits various applications in the field of soft and transparent sensors, nanophones, actuators, and other robotics systems for both indoor and outdoor environments.

Source link: https://europepmc.org/article/MED/35985239


Effect of Multi-Walled Carbon Nanotubes and Carbon Fiber Reinforcements on the Mechanical and Tribological Behavior of Hybrid Mg-AZ91D Nanocomposites.

Research has been carried out to improve the magnesium AZ91D hybrid composite's structure by reinforcing carbon fibers and multi-walled carbon nanotubes with different weight percentages in this paper. Compared to the base Mg composite, the test findings revealed that the addition of CF and MWCNT reinforcements enhanced the hybrid Mg composite's hardness, tensile strength, and impact strength, as well as its impact strength. Compare to the base Mg AZ91D's + 0. 7 percent MWCNT hybrid composite, which displayed 19%, 35%, and 66% greater hardness, tensile strength, and impact strength. The Mg composite's increased wear resistance of the Mg composite in comparison to the base matrix's was also shown in the wear test findings. The magnesium composite's improved mechanical and tribological stability is also due to the homogeneous delivery of the hard reinforcement particles along the grain boundaries, which is also due to the grain boundaries' homogeneous distribution of the hard reinforcement particles.

Source link: https://europepmc.org/article/MED/36079562


Progress in Chemical Recycling of Carbon Fiber Reinforced Epoxy Composites.

Because of their high specific strength, carbon fiber reinforced polymer composite composites are used in a variety of industries. CFRPs are generally made of carbon fibers as reinforcements and crosslinked polymers as binders. To extend the service life and minimize the garbage and costs, it is important to develop efficient recycling techniques to hold the residue value of carbon fiber and polymer matrix. Chemical recycling by cleaving the covalent bonds in a solvent has been deemed as the most effective method for recycling CFRP wastes in the last decade, and it deserves more research and attention in the upcoming year because it can recover both valuable CFs and polymer matrix. The focus of this article is on the latest developments in CFRP chemical recycling. epoxy resin, the most commonly used polymer matrix in industry, is the primary matrix resin of CFRP discussed in this study.

Source link: https://europepmc.org/article/MED/36056702


Constructing a Double Alternant "Rigid-Flexible" Structure for Simultaneously Strengthening and Toughening the Interface of Carbon Fiber/Epoxy Composites.

An optimized "rigid-flexible" polyethyleneimine and a "flexible" epoxy were applied to produce a double alternant / rigid-flexible" structure for simultaneously strengthening and hardening CF/EP composites while simultaneously strengthening and toughening CF/EP composites. PDA and PEI polymers can significantly improve the roughness and wettability of CF surfaces, dramatically raising the mechanical interlocking and chemical interactions between CFs and epoxy. When compared to those of the unmodified CF composite, respectively, the interfacial shear force, interlaminar shear strength, impact ability, and impact grew by 80. 2%, 23. 5%, and 167. 2%, and 167. 2%.

Source link: https://europepmc.org/article/MED/36080092


Activated Porous Carbon Fiber: New Adsorbent for Sampling and Analysis by Thermal Desorption of Siloxanes in Biogas and Biomethane.

Alternative energy sources' increasing global demand for increased global energy demand necessitates continuous growth and optimization of alternative energy sources. Waste conversion into biogas and biomethane is an interesting energy source, according to the circular economy approach. Quality control and the use of cleaning up equipment are among biomethane's distribution network and energy conversion devices that must be monitored and controlled. Siloxanes are one of the contaminating substances that are mainly present in biogas and biomethane, and if not removed sufficiently, they can damage the quality and use of the gas. In addition, siloxanes directly inhibit biomethane's combustion's kinetics due to their innovative scavenging abilities. In this research, the effectiveness of APCF tube was evaluated by comparing it to a common multilayer tube for sampling and analyzing siloxanes in laboratory scale and in real scale.

Source link: https://europepmc.org/article/MED/36078606


Activated carbon fiber derived from wasted coal liquefaction residual for CO 2 capture.

The activation conditions, including the reaction temperature and soaking time, were adjusted by a wasteful coal liquefaction residual used to synthesize activated carbon fibers for CO 2 capture, and the characteristics of the finished ACFs were optimized by adjusting the reaction temperature and soaking time. Since the diameter of CO 2 is 0. 33 nm, it is easy to CO2 absorption by micropores. Adsorption isotherm of ACFs for CO 2 in the Langmuir model, indicating that the adsorption process of CO 2 by ACFs can be attributed to monolayer adsorption. ACFs-920-3 had the most adsorption capacity for CO 2 in flue gas, according to the dynamic adsorption experiment, and adsorption equilibrium was established after 7 min of adsorption. The adsorption process of CO 2 in flue gas by the as-synthesized ACFs corresponds well to the pseudosecond kinetic model.

Source link: https://europepmc.org/article/MED/36058269


Improve the Interfacial Properties between Poly(arylene sulfide sulfone) and Carbon Fiber by Double Polymeric Grafted Layers Designed on a Carbon Fiber Surface.

As the interphase in carbon fiber reinforced poly composite to focus on improving the interfacial strength, two polymeric grafted layers are produced by two steps of chemical reaction, respectively polydopamine film and modified PASS resin containing amine group. Moreover, the study has shown that laying down a double polymeric grafted layer on a carbon fiber surface is a promising way to convert carbon fiber for processing high-performance advanced thermoplastic composites while also being cost-effective.

Source link: https://europepmc.org/article/MED/36047935


Valuable aramid/cellulose nanofibers derived from recycled resources for reinforcing carbon fiber/phenolic composites

Extreme production costs and lengthy preparation cycle stand in the scale-up production of aramid nanofiber and cellulose nanofiber. The ANF/CNF's nanoscale building blocks and their reinforcement effects on carbon fiber/phenolic composites' mechanical properties were investigated. According to 118. 1%, 142. 2%, 354. 4%, 38. 4%, and 94 percent, respectively, the tensile, bending, shear, and nanoindentation tests's relative strength and modulus of ANF/CNF-enhanced composites increased by 118. 1%, 354. 4 percent, 354. 4 percent, and 94. 4%, respectively.

Source link: https://europepmc.org/article/MED/IND607797603


Effect of Interlaminar Toughness on the Residual Compressive Capacity of Carbon Fiber Laminates with Different Types of Delamination.

When the mode I toughness increased by 81. 8 percent, the compressive strength of the specimens containing the deeply buried delamination decreased by 14. 01 MPa, but the specimen containing the surface delamination caused only decreased by 30. 86 MPa when the mode II fracture toughness increased by 87. 2 percent. Moreover, a qualitative damage relationship, which articulated the connection between delamination growth and compression damage vividly, was also suggested. The reason why the increase of the toughness may have hampered the subsequent deposition of the laminates with delamination was that the higher fracture hardness hindered the secondary expansion of the delamination during the compression process, so that the delamination area could almost remain unchanged.

Source link: https://europepmc.org/article/MED/36080639


Stitching Repair for Delaminated Carbon Fiber/Bismaleimide Composite Laminates.

Bismaleimide matrix composite materials have been widely used in aircraft due to their outstanding mechanical stability and heat resistance. Then, the thread bundles threading through the laminate become the pins after the curing process, thus resulting in the bridging effect between delaminated layers. The modulus had been completely recovered on a carbon fiber/bismaleimide composite plate with a circular delamination of about 30 mm in diameter, and the results revealed that the in-plane compressive strength could be restored from 56. 5 percent to 84. 2 percent of the pristine plate.

Source link: https://europepmc.org/article/MED/36080630

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions