Nanoparticle-Infused UHMWPE Layer as Multifunctional Coating for High-Performance PPTA Single Fibers

Zhang, Zhuolei; Zhao, Yao; Li, Haoqi; Percec, Simona; Yin, Jie; Ren, Fei

doi:10.1038/s41598-019-43629-1

Cited by 9 publications

(8 citation statements)

References 41 publications

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“…The mechanical properties and friction and adhesion characteristics of fibrous tows were considered in establishing the fibrous tow mechanical model, in which Tðe; e 0 ; nÞ represents the external load applied to the fiber T e; e 0 ; n ð Þ¼ r e; e 0 ; n ð ÞA (38) where A is the fiber's cross-sectional area. The interaction between the fiber and the spool includes friction and adhesion, but with changing directions at different loading stages.…”

Section: Combining the Superposition And Friction And Adhesion Modelsmentioning

confidence: 99%

“…The friction between fibrous tows and other material surfaces was proposed, which is closely related to the effective contact area. [36][37][38] By determining the contact mechanism between fibrous tows and spools, the effective contact areas can be determined. Assuming that the contacting objects are rigid bodies and that there is no adhesion between the contact surfaces, the classical Hertz contact theory can be applied to accurately explain the contact mechanism between rigid bodies.…”

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confidence: 99%

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Modeling of fibrous tow transmission considering residual strain and friction

Che

Zhang

Hou

et al. 2021

Textile Research Journal

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This study established a mechanical model based on the mechanical properties of fibrous tows and their force of interaction with spools. The proposed model not only describes the hysteresis, nonlinear elastic, and viscoelastic stress components, but also analyzes the effect of residual strain on aramid fiber mechanical properties. Moreover, the effect of the interaction force between the fiber and spool on the transmission accuracy should be considered. Contrary to the conventional view, hysteresis is caused not only by internal sliding among molecules and molecular chains but also by friction between the fibers and spools. To assess this effect, several monotonous and cyclic tensile tests were conducted, with the results showing that the maximum relative error of the mechanical model did not exceed 5%. The proposed mechanical model can help designers determine effective carrying ranges and predict the fiber mechanical behavior, thereby laying a foundation for achieving nonlinear control of the fibrous tow transferring load.

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Section: Combining the Superposition And Friction And Adhesion Modelsmentioning

confidence: 99%

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confidence: 99%

Modeling of fibrous tow transmission considering residual strain and friction

Che

Zhang

Hou

et al. 2021

Textile Research Journal

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“…It far exceeds common commercial polymers in aspects such as tensile strength, modulus, toughness, and wear resistance. − It plays an irreplaceable role as an important engineering and biological material , in artificial joints, battery diaphragms, etc. Because of their high strength and modulus qualities, UHMWPE fibers are employed in military, nautical, aerospace, and other significant applications. − It is difficult to be processed by traditional flow processing methods due to the exceptionally high molecular weight and high viscosity after melting. Sintering processing is a method borrowed from powder metallurgy of refractory metals which avoids the problem of hard to flow of the melt. − …”

Section: Introductionmentioning

confidence: 99%

Research on Chain Diffusion and Entanglement via Controlling the Sintering Process of Nascent UHMWPE

Wang,

Chen

2024

Macromolecules

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The diffusion and entanglement of molecular chains have a significant impact on ultrahigh-molecular-weight polyethylene (UHMWPE) processing and product qualities. During sintering, the relationship between the melting behavior and chain diffusion in nascent UHMWPE remains unclear. In this work, nascent UHMWPE with different degrees of entanglement was used for sintering under different temperature conditions. Tensile drawing experiments performed above the melting point were used to study the degree of chain diffusion. The results reveal that the chain diffusion degree is proportional to the heating rate (S) at the same sintering temperature when S is above 1 °C/min. The chain diffusion is more sensitive to the sintering temperature at higher heating rates. The melting process suggests that rapid heating is necessary for melting explosion, which leads to a rapid chain diffusion. When heated slowly, crystals are melted more gently, and the chains may melt successively from the surface to the center, resulting in a lesser degree of chain diffusion or entanglement. Finally, the high melting point of nascent crystals and the variation of the melting point with heating rate may be related to the increasing entropy during melting.

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“…Para aramid fibers, that is, poly( p -phenylene terephthamide) fibers, are well known for their high strength, high modulus, and high crystallinity. − They have not only excellent mechanical properties but also outstanding thermal stability, chemical stability, heat resistance, and flame retardant ability. Para aramid fibers (commonly referred to as PPTA fibers) were first produced in 1972 and have since then been widely used in diverse areas such as military applications, aerospace industry, electrical engineering, and so on. ,, Because PPTA fibers are excellent materials for electrical insulation, they can easily generate and accumulate substantial static electricity that can damage electronic equipment and textiles during their use .…”

Section: Introductionmentioning

confidence: 99%

Conductive Aramid Fibers from Electroless Silver Plating of Crosslinked HPAMAM-Modified PPTA: Preparation and Properties

et al. 2022

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Conductive aramid (PPTA) fibers are highly needed for making flexible conductive materials, antistatic materials, and electromagnetic shielding materials. In this work, silver-plated conductive PPTA fibers with high conductivity and excellent mechanical properties were prepared by the electroless plating of PPTA fibers modified with crosslinked hyperbranched polyamide-amine (HPAMAM). The crosslinked HPAMAM creates a stable interface between the PPTA fibers and the silver plating. The morphology and physicochemical properties of the modified and the silver-plated fibers were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, atomic force microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and thermogravimetric analysis. Three epoxy crosslinking agents with different chain lengths were used to crosslink HPAMAM, and the effects of HPAMAM concentration, crosslinking agent dosage, and crosslinking time on the resistance of the fibers were studied. The long chain crosslinking agent appears to be beneficial to silver plating. The lowest resistance (0.067 Ω/cm) was attained when HPAMAM was modified by diethylene glycol diglycidyl ether (1:1 molar ratio), and 20 g/L HPAMAM was used to modify the PPTA fibers. The tensile strength of the original PPTA fibers decreased by only 3% or less after silver plating.

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Nanoparticle-Infused UHMWPE Layer as Multifunctional Coating for High-Performance PPTA Single Fibers

Cited by 9 publications

References 41 publications

Modeling of fibrous tow transmission considering residual strain and friction

Modeling of fibrous tow transmission considering residual strain and friction

Research on Chain Diffusion and Entanglement via Controlling the Sintering Process of Nascent UHMWPE

Conductive Aramid Fibers from Electroless Silver Plating of Crosslinked HPAMAM-Modified PPTA: Preparation and Properties

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