ESR study of atmospheric pressure plasma jet irradiated aramid fibers

Sun, Jie; Yao, Lan; Sun, Shiyuan; Qiu, Yiping

doi:10.1016/j.surfcoat.2011.05.045

Cited by 29 publications

(19 citation statements)

References 37 publications

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“…Methods to increase adhesion of aramid fibers have been studied widely and they continue to be a topic of great interest in the industrial and academic world. Currently used methods often aim to change the chemical structure of the fiber surface [5], [6], [7] or to add a substantial coating to the fiber surface [8], [9] that enables bonding with the matrix material. However, the problem with these methods is that they are specific to certain matrix material only [8], the effect of the treatment wears off with time [5] or they lower the tensile strength of the fiber [10].…”

Section: Introductionmentioning

confidence: 99%

Microwave induced hierarchical nanostructures on aramid fibers and their influence on adhesion properties in a rubber matrix

Palola

Sarlin

Azari

et al. 2017

Applied Surface Science

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At the moment several commercial surface treatments are used to increase adhesion between aramid fiber and matrix material in composite structures but each of these have some limitations. The aim of this study is to address some of these limitations by developing a surface treatment method for aramid fibers that would not affect mechanical properties of the fibers negatively, could be used with any matrix material and that could withstand handling of the fibers and ageing. The method used is microwave assisted surface treatment that uses microwave radiation together with dry reactive chemicals to create hierarchical structures to the fiber surface and so makes it possible to control the adhesion properties of the fibers. SEM imaging, fiber tensile tests and modified bundle pull-out test were used to investigate the outcome of the surface treatment and measure adhesion between aramid fiber bundles and rubber. SEM imaging revealed that nanoscale deposits are formed on to the fiber surface which enable mechanical interlocking between the fiber and the matrix material. Fiber tensile tests showed that the surface treatment does not influence tensile properties of the fiber negatively. Results from the bundle pull-out tests confirmed that this kind of method can lead up to 259% improvement in adhesion when compared to untreated aramid fibers in rubber matrix.

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Section: Introductionmentioning

confidence: 99%

Microwave induced hierarchical nanostructures on aramid fibers and their influence on adhesion properties in a rubber matrix

Palola

Sarlin

Azari

et al. 2017

Applied Surface Science

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“…The problem of surface inert has been studied by other investigators, and extensive studies have been devoted to the aramid fibers surface modification, a variety of techniques have been utilized to improve their interfacial adhesion. Those studies and techniques mainly involve chemical etching and grafting, plasma treatment, γ‐ray irradiation, coating methods and ultrasonic processing . These studies are mainly based upon classical approaches.…”

Section: Introductionmentioning

confidence: 99%

Surface ammonification of the mutual‐irradiated aramid fibers in 1,4‐dichlorobutane for improving interfacial properties with epoxy resin

Xie

Xing

Liu

et al. 2017

J of Applied Polymer Sci

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The mutual irradiated aramid fibers in 1,4-dichlorobutane was ammoniated by ammonia/alcohol solution, in an attempt to improve the interfacial properties between aramid fibers and epoxy matrix. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), dynamic contact angle analysis (DCA), interfacial shear strength (IFSS), and single fiber tensile testing were carried out to investigate the functionalization process of aramid fibers and the interfacial properties of the composites. Experimental results showed that the fiber surface elements content changed obviously as well as the roughness through the radiation and chemical reaction. The surface energy and IFSS of aramid fibers increased distinctly after the ammonification, respectively. The amino groups generated by ammonification enhanced the interfacial adhesion of composites effectively by participating in the epoxy resin curing. Moreover, benefited by the appropriate radiation, the tensile strength of aramid fibers was not affected at all.

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“…There are many effective methods to characterize the evolution of structure and properties, such as X‐ray diffraction (XRD),8–12 viscosity,2, 6, 13 FTIR,6, 13–15 laser scanning confocal microscopy,2 electron spin resonance spectroscopy,16 energy dispersive X‐ray spectroscopy,1 small angle X‐ray scattering (SAXS),17, 18 and scanning electron microscopy (SEM) 13, 19. As to PPTA fiber, viscosity, XRD, and FTIR are proved to be effective methods to study the hydrothermal aging.…”

Section: Introductionmentioning

confidence: 99%

The evolution of structure and properties of poly(p‐phenylene terephthalamide) during the hydrothermal aging

Zhan

Huang

et al. 2012

J of Applied Polymer Sci

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The evolution of structure and properties of poly(p-phenylene terephthalamide) (PPTA) with different hydrothermal aging temperatures were systematically investigated. The cooperative change in tensile strength and reduced viscosity upon aging time indicated a direct chemical structure-property correlation. The linear relationship between tensile strength and reduced viscosity was explored. Wide angle X-ray diffraction measurements disclosed the crystal structure of aramid fibers was stable with aging time and temperature. Fiber exhibited skin and core structure in different ways. Cracks and microfilbrils were observed in the core after hydrothermal aging, while the structure was unchanged in the skin. Fourier transform infrared spectroscopy also proved that the chemical structure of the skin was not affected by degradation. The results elucidated the hydrolysis of amide function happened in amorphous or bundles between microfibrils in the core rather than in skin of the fiber. V C 2012 Wiley Periodicals, Inc. J Appl Polym Sci 126: 552-558, 2012

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ESR study of atmospheric pressure plasma jet irradiated aramid fibers

Cited by 29 publications

References 37 publications

Microwave induced hierarchical nanostructures on aramid fibers and their influence on adhesion properties in a rubber matrix

Microwave induced hierarchical nanostructures on aramid fibers and their influence on adhesion properties in a rubber matrix

Surface ammonification of the mutual‐irradiated aramid fibers in 1,4‐dichlorobutane for improving interfacial properties with epoxy resin

The evolution of structure and properties of poly(p‐phenylene terephthalamide) during the hydrothermal aging

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