The Experts below are selected from a list of 219 Experts worldwide ranked by ideXlab platform
T. Theyson - One of the best experts on this subject based on the ideXlab platform.
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Effect of relative rubbing speed on the tribo‐electrification of Continuous Filament yarn by stainless steel pins
Journal of The Textile Institute, 2011Co-Authors: William Oxenham, Abdel Fattah M Seyam, T. TheysonAbstract:The effect of relative rubbing speed on the tribo‐electrification between different Continuous Filament yarns and stainless steel “charging pins” was analysed. A modified linear tester, housed in an environmental room, was used to charge the yarn while transporting at desired speed and input tension. The yarn was rubbed against the charging pin, which was also rotated at different speeds. The yarn surface charge, yarn output tension and charging pin’s vibration were monitored in real time automatically. The results showed that for nylon yarn charge was minimized when the yarn/pin relative speed approached zero, regardless of the absolute rubbing speeds of yarn and pin. It was also found that, at the same relative speed, less charge was generated when a larger pin was used. For finish‐free nylon yarn, the charge was also minimized as the relative speed approaches zero; however, for finish‐free polyester yarn and finish‐free polypropylene yarn, the effect of relative rubbing speed on the electrification was...
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effect of relative rubbing speed on the tribo electrification of Continuous Filament yarn by stainless steel pins
Journal of The Textile Institute, 2011Co-Authors: William Oxenham, Abdel Fattah M Seyam, T. TheysonAbstract:The effect of relative rubbing speed on the tribo‐electrification between different Continuous Filament yarns and stainless steel “charging pins” was analysed. A modified linear tester, housed in an environmental room, was used to charge the yarn while transporting at desired speed and input tension. The yarn was rubbed against the charging pin, which was also rotated at different speeds. The yarn surface charge, yarn output tension and charging pin’s vibration were monitored in real time automatically. The results showed that for nylon yarn charge was minimized when the yarn/pin relative speed approached zero, regardless of the absolute rubbing speeds of yarn and pin. It was also found that, at the same relative speed, less charge was generated when a larger pin was used. For finish‐free nylon yarn, the charge was also minimized as the relative speed approaches zero; however, for finish‐free polyester yarn and finish‐free polypropylene yarn, the effect of relative rubbing speed on the electrification was...
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static generation and dissipation of polyester Continuous Filament yarn
Journal of The Textile Institute, 2010Co-Authors: Abdel Fattah M Seyam, William Oxenham, T. TheysonAbstract:The effect of environmental conditions (temperature and relative humidity) and contact conditions (yarn tension and speed) on static generation and dissipation of polyester flat Continuous Filament yarn, when rubbed against stainless steel was analyzed. A newly developed device, housed in an environmental room, was used to charge the yarn while moving under desired tension. The charge potentials were measured at two different positions in real time. These measurements and previously established exponential relationship permitted the calculation of the initial potential (at the generation point) and a ‘characteristic decay time’, which is a measure of static dissipation. Experimental data showed that temperature, humidity, yarn tension, and yarn speed have significant effects on static generation; while temperature, humidity, and yarn speed yielded statistically significant changes on static dissipation. Anomalous behavior of static charge when measured at a temperature of 35°C, provided a meaningful clue ...
William Oxenham - One of the best experts on this subject based on the ideXlab platform.
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Effect of relative rubbing speed on the tribo‐electrification of Continuous Filament yarn by stainless steel pins
Journal of The Textile Institute, 2011Co-Authors: William Oxenham, Abdel Fattah M Seyam, T. TheysonAbstract:The effect of relative rubbing speed on the tribo‐electrification between different Continuous Filament yarns and stainless steel “charging pins” was analysed. A modified linear tester, housed in an environmental room, was used to charge the yarn while transporting at desired speed and input tension. The yarn was rubbed against the charging pin, which was also rotated at different speeds. The yarn surface charge, yarn output tension and charging pin’s vibration were monitored in real time automatically. The results showed that for nylon yarn charge was minimized when the yarn/pin relative speed approached zero, regardless of the absolute rubbing speeds of yarn and pin. It was also found that, at the same relative speed, less charge was generated when a larger pin was used. For finish‐free nylon yarn, the charge was also minimized as the relative speed approaches zero; however, for finish‐free polyester yarn and finish‐free polypropylene yarn, the effect of relative rubbing speed on the electrification was...
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effect of relative rubbing speed on the tribo electrification of Continuous Filament yarn by stainless steel pins
Journal of The Textile Institute, 2011Co-Authors: William Oxenham, Abdel Fattah M Seyam, T. TheysonAbstract:The effect of relative rubbing speed on the tribo‐electrification between different Continuous Filament yarns and stainless steel “charging pins” was analysed. A modified linear tester, housed in an environmental room, was used to charge the yarn while transporting at desired speed and input tension. The yarn was rubbed against the charging pin, which was also rotated at different speeds. The yarn surface charge, yarn output tension and charging pin’s vibration were monitored in real time automatically. The results showed that for nylon yarn charge was minimized when the yarn/pin relative speed approached zero, regardless of the absolute rubbing speeds of yarn and pin. It was also found that, at the same relative speed, less charge was generated when a larger pin was used. For finish‐free nylon yarn, the charge was also minimized as the relative speed approaches zero; however, for finish‐free polyester yarn and finish‐free polypropylene yarn, the effect of relative rubbing speed on the electrification was...
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static generation and dissipation of polyester Continuous Filament yarn
Journal of The Textile Institute, 2010Co-Authors: Abdel Fattah M Seyam, William Oxenham, T. TheysonAbstract:The effect of environmental conditions (temperature and relative humidity) and contact conditions (yarn tension and speed) on static generation and dissipation of polyester flat Continuous Filament yarn, when rubbed against stainless steel was analyzed. A newly developed device, housed in an environmental room, was used to charge the yarn while moving under desired tension. The charge potentials were measured at two different positions in real time. These measurements and previously established exponential relationship permitted the calculation of the initial potential (at the generation point) and a ‘characteristic decay time’, which is a measure of static dissipation. Experimental data showed that temperature, humidity, yarn tension, and yarn speed have significant effects on static generation; while temperature, humidity, and yarn speed yielded statistically significant changes on static dissipation. Anomalous behavior of static charge when measured at a temperature of 35°C, provided a meaningful clue ...
Abdel Fattah M Seyam - One of the best experts on this subject based on the ideXlab platform.
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Effect of relative rubbing speed on the tribo‐electrification of Continuous Filament yarn by stainless steel pins
Journal of The Textile Institute, 2011Co-Authors: William Oxenham, Abdel Fattah M Seyam, T. TheysonAbstract:The effect of relative rubbing speed on the tribo‐electrification between different Continuous Filament yarns and stainless steel “charging pins” was analysed. A modified linear tester, housed in an environmental room, was used to charge the yarn while transporting at desired speed and input tension. The yarn was rubbed against the charging pin, which was also rotated at different speeds. The yarn surface charge, yarn output tension and charging pin’s vibration were monitored in real time automatically. The results showed that for nylon yarn charge was minimized when the yarn/pin relative speed approached zero, regardless of the absolute rubbing speeds of yarn and pin. It was also found that, at the same relative speed, less charge was generated when a larger pin was used. For finish‐free nylon yarn, the charge was also minimized as the relative speed approaches zero; however, for finish‐free polyester yarn and finish‐free polypropylene yarn, the effect of relative rubbing speed on the electrification was...
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effect of relative rubbing speed on the tribo electrification of Continuous Filament yarn by stainless steel pins
Journal of The Textile Institute, 2011Co-Authors: William Oxenham, Abdel Fattah M Seyam, T. TheysonAbstract:The effect of relative rubbing speed on the tribo‐electrification between different Continuous Filament yarns and stainless steel “charging pins” was analysed. A modified linear tester, housed in an environmental room, was used to charge the yarn while transporting at desired speed and input tension. The yarn was rubbed against the charging pin, which was also rotated at different speeds. The yarn surface charge, yarn output tension and charging pin’s vibration were monitored in real time automatically. The results showed that for nylon yarn charge was minimized when the yarn/pin relative speed approached zero, regardless of the absolute rubbing speeds of yarn and pin. It was also found that, at the same relative speed, less charge was generated when a larger pin was used. For finish‐free nylon yarn, the charge was also minimized as the relative speed approaches zero; however, for finish‐free polyester yarn and finish‐free polypropylene yarn, the effect of relative rubbing speed on the electrification was...
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static generation and dissipation of polyester Continuous Filament yarn
Journal of The Textile Institute, 2010Co-Authors: Abdel Fattah M Seyam, William Oxenham, T. TheysonAbstract:The effect of environmental conditions (temperature and relative humidity) and contact conditions (yarn tension and speed) on static generation and dissipation of polyester flat Continuous Filament yarn, when rubbed against stainless steel was analyzed. A newly developed device, housed in an environmental room, was used to charge the yarn while moving under desired tension. The charge potentials were measured at two different positions in real time. These measurements and previously established exponential relationship permitted the calculation of the initial potential (at the generation point) and a ‘characteristic decay time’, which is a measure of static dissipation. Experimental data showed that temperature, humidity, yarn tension, and yarn speed have significant effects on static generation; while temperature, humidity, and yarn speed yielded statistically significant changes on static dissipation. Anomalous behavior of static charge when measured at a temperature of 35°C, provided a meaningful clue ...
Hong Liu - One of the best experts on this subject based on the ideXlab platform.
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High-performance wearable supercapacitors fabricated with surface activated Continuous Filament graphite fibers
Journal of Power Sources, 2017Co-Authors: Dedong Jia, Tinghan Chen, Shu Wang, Hua Tan, Hong Liu, Zhong Lin WangAbstract:Abstract Generally, carbon or graphite fibers (GFs) are used as the supporting materials for the preparation of flexible supercapacitors (SCs) by assembling various electrochemically active nanomaterials on them. A facile and rapid electrochemical oxidation method with a voltage of 3 V in a mixed H 2 SO 4 -HNO 3 solution for 2–15 min is proposed to active Continuous Filament GFs. Detailed structural characterization, SEM, TEM, XRD, Raman and XPS demonstrate that the GFs-8 (oxidized for 8 min) possessing high specific surface area which provided numerous electrochemical sites and a large number of oxygen-containing functional groups producing pseudocapacitance. Cyclic voltammetric (CV), galvanostatic charge-discharge measurements and electrochemical impedance spectroscopy (EIS) are conducted to test the capacitive of GFs and activated GFs. The capacitance of GFs-8 reaches as high as 570 mF cm −1 at the current density of 1 mA cm −1 in LiCl electrolyte, a 1965-fold enhancement with respect to the pristine GFs (0.29 mF cm −1 ). The fabricated fiber solid-state supercapacitors (SSCs) provide high energy density of 0.68 mWh cm −3 at the power density 3.3 W cm −3 and have excellent durability with 90% capacitance retention after 10000 cycles. In addition, such fiber SSCs features flexibility and mechanical stability, which may have wide applications in wearable electronic devices.
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hierarchical porous carbon with ordered straight micro channels templated by Continuous Filament glass fiber arrays for high performance supercapacitors
Journal of Materials Chemistry, 2017Co-Authors: Dedong Jia, Hong LiuAbstract:Hierarchical porous carbon with highly ordered straight micro-channels was prepared though a facile melt vacuum infiltration method using Continuous Filament glass fiber arrays as the template and glucose as the precursor. The as-prepared carbon material shows high specific surface areas up to 1880 m2 g−1 profited from the unique structure of straight micro-channels. A fine pore structure is formed in the channel wall through KOH activation after the removal of the glass fiber array. Electrochemical evaluation of the carbon material indicates that the hierarchical porous carbon exhibits a high specific capacitance of 283 F g−1 at a current density of 0.25 A g−1 with an alkaline electrolyte (6 M KOH) in a three-electrode system. It also demonstrates excellent cycling stability with a capacity retention of 88.5% over 10 000 cycles at a high current density of 6 A g−1. These exciting results demonstrate a very simple and low-cost method for large-scale preparation of electrode materials for supercapacitors.
A. Pakhira - One of the best experts on this subject based on the ideXlab platform.
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EVALUATION OF THE WEAVABILITY OF POLYESTER-FIBRE MULTIFilament SIZED YARN
Journal of The Textile Institute, 1998Co-Authors: Bijoya Kumar Behera, A. PakhiraAbstract:The mechanism of warp breakage during the weaving of polyester-fibre Continuous-Filament yarns is described. Techniques for the laboratory evaluation of the weavability of sized Continuous-Filament yarn are suggested. Correlations between various weavability indices and sized-yarn and size-material properties are estimated to determine which of the methods gives a better representation of the relative weaving properties of Continuous-Filament sized yarn. The performance of various size materials when applied to polyester-fibre yarn is studied. The performance of sized microfibre yarn is also highlighted.
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studies on structural changes in and damage to polyester fibre Continuous Filament yarn during sizing
Journal of The Textile Institute, 1998Co-Authors: B. K. Behera, A. PakhiraAbstract:This paper presents an account of mechanical, thermal, and thermomechanical damage taking place during the sizing of polyester-fibre Continuous-Filament yarns. Structural changes due to axial, transverse, and tangential forces on the yarn during sizing are studied by using X-ray-diffraction and birefringence techniques. Surface damage to the yarn is examined by the scanning electron microscope. The effect of a squeeze load on fibre damage is also investigated. The study is extended to textured and microdenier multiFilament yarns.