Mechanical properties of hybrid composites reinforced by carbon fiber and high-strength and high-modulus polyimide fiber

He, Bin; Wang, Boyao; Wang, Zhanwen; Qi, Shengli; Tian, Guofeng; Wu, Dezhen

doi:10.1016/j.polymer.2020.122830

Cited by 34 publications

(18 citation statements)

References 35 publications

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“…After hot-press curing, a series of fabric-reinforced composite laminates were obtained. The curing procedure was 125 °C/2 h + 165 °C/3 h + 185 °C/3 h, which was in accordance with previous work [ 26 ], and the curing pressure was 3 MPa. In this work, the hybrid ratio was defined as the mass percentage of carbon fiber in the total fiber.…”

Section: Methodssupporting

confidence: 85%

Enhanced Impact Properties of Hybrid Composites Reinforced by Carbon Fiber and Polyimide Fiber

Wang

et al. 2021

Polymers

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A series of hybrid fiber-reinforced composites were prepared with polyimide fiber and carbon fiber as the reinforcement and epoxy resin as the matrix. The influence of stacking sequence on the Charpy impact and flexural properties of the composites as well as the failure modes were studied. The results showed that hybrid fiber-reinforced composites yielded nearly 50% increment in Charpy impact strength compared with the ones reinforced by carbon fiber. The flexural performance was significantly improved compared with those reinforced solely by polyimide fibers and was greatly affected by the stacking sequence. The specimens with compressive sides distributed with carbon fiber possessed higher flexural strength, while those holding a sandwich-like structure with carbon fiber filling between the outer layers displayed a higher flexural modulus.

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Section: Methodssupporting

confidence: 85%

Enhanced Impact Properties of Hybrid Composites Reinforced by Carbon Fiber and Polyimide Fiber

Wang

et al. 2021

Polymers

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“…Carbon fiber, acted as the core, has high strength and modulus, which can provide the maximum loadbearing ability with the unidirectional multifilament as the core of spring wire. [22][23][24] Aramid fiber and UHMWPE fiber have good deformation and toughness, which are suitable for knitting structure with less fiber damage in the loop formation process. [25][26][27] The "skin-core" helical composite spring was manufactured by an integrated formation process based on the VARI technology.…”

Section: Composite Spring Preparationmentioning

confidence: 99%

Composite helical spring with skin‐core structure: Structural design and compression property evaluation

et al. 2020

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The helical spring is an essential mechanical component of automobile and machinery and has been widely used in industrial application. The weight reduction is the requirement of current material design and also the research trend for material development. In this study, a novel composite helical spring with "skin-core" structure was designed and fabricated with an integrated formation process based on the vacuum-assisted resin infusion technology. Based on the different function of skin and core, the skin structure was weft knitting tube made of aramid and ultra-high molecular weight polyethylene fiber, and the core structure was unidirectional carbon fiber. By selecting material for knitting tube and adjusting the volume content of carbon fiber core, the static and fatigue compression properties of composite helical spring were investigated. It has been found that the spring torsion and bending performance can be improved by wrapping the core with the knitting tube as the spring wire. Moreover, the finite element method was applied to further analyze the stress evolution of the "skin-core" composite helical spring during compression and fatigue. The results of compression test and simulation show that the spring stiffness can be effectively improved by using knitting tube and increasing the content of carbon fiber. The stress of the spring cross section is concentrated in the internal radial region of 180 , and the distribution of the corresponding cross sections is relatively uniform. The "skin-core" structure with aramid knitting tube as the outer skin and carbon fiber as the spring core significantly improves the load-carrying capacity and stability of the composite spring. The proposed lightweight helical composite could provide a replacement strategy of existing metal or unidirectional filament reinforced springs used in the engineering applications.

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“…It can provide many channels for proton and electron transport and is often used in energy storage equipment. [5][6][7] Polyimide gel is a potential medium material with good mechanical properties and flexibility, low thermal conductivity, excellent bending and folding besides 8,9 its general structural characteristics. At the same time, the pyrolysis of aromatic polymer materials at high temperatures to obtain high-quality carbonized materials which can maintain the original shape has been widely concerned.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of PI gel carbonized material and its use in a supercapacitor

Ding

et al. 2022

High Performance Polymers

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In this study, a polyimide gel material with a high spatial network structure was synthesized. The pyrolysis process increased the material’s porous structure and specific surface area to improve the specific capacitance. The effects of pyrolysis temperature on morphology, structure, thermal, mechanical, and electrochemical properties were studied. The gel material is in the frozen state of the molecular chain from the frozen state to the moving state before 400°C. At the same time, pore structure formation with a weight loss rate of 11.9% in the decomposition state at 400°C–600°C, showing the breakage of the molecular chain and the decomposition of the polymer. With the increase of carbonized temperature, the pore structure becomes more compact while the pore size becomes smaller due to the reconstruction of the polymer structure. Meanwhile, due to the stable formation of carbon skeleton and the increase of carbon amount, the PI gel carbonized material’s thermal conductivity was improved to 1.458 [Formula: see text], which was 330% higher than that of pure PI gel (0.339 [Formula: see text]). Furthermore, the carbonized materials exhibit a specific capacitance of 66.17 [Formula: see text] and show good redox reversibility, apparent concentration polarization and good ion diffusion effect during charging and discharging, suggesting it is a promising electrode material for supercapacitors.

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Mechanical properties of hybrid composites reinforced by carbon fiber and high-strength and high-modulus polyimide fiber

Cited by 34 publications

References 35 publications

Enhanced Impact Properties of Hybrid Composites Reinforced by Carbon Fiber and Polyimide Fiber

Enhanced Impact Properties of Hybrid Composites Reinforced by Carbon Fiber and Polyimide Fiber

Composite helical spring with skin‐core structure: Structural design and compression property evaluation

Synthesis and characterization of PI gel carbonized material and its use in a supercapacitor

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