The Experts below are selected from a list of 183 Experts worldwide ranked by ideXlab platform
Tae Jin Kang - One of the best experts on this subject based on the ideXlab platform.
-
a comparison of the interfacial thermal and ablative properties between spun and Filament Yarn type carbon fabric phenolic composites
Carbon, 2004Co-Authors: Jong Kyoo Park, Tae Jin KangAbstract:Abstract In the present paper, the interfacial, thermal, and ablative properties of phenolic composites reinforced with spun Yarn type carbon fabrics (spun C/P composite) and Filament Yarn type carbon fabrics (Filament C/P composite) heat-treated at 1100 °C have been extensively compared. The interlaminar shear strength, crack growth rate, and fracture surface were studied to evaluate the interfacial characteristics of the composites using short-beam shear test, double cantilever beam test, and scanning electron microscopy, respectively. The thermal conductivity and the coefficient of thermal expansion were also measured in the longitudinal and transverse directions, respectively. To explore the ablative characteristics of the composites in terms of insulation index, erosion rate, and microscopic pattern of ablation, an arc plasma torch was used. The interfacial properties of the spun C/P composite are significantly greater than those of the Filament C/P composite, with qualitative support of fracture surface observations. It has been investigated that the presence of protruded fibers in the phenolic matrix of the spun C/P composite may play an important role in enhancing the properties due to a fiber bridging effect. The longitudinal thermal conductivity of the spun C/P composite is about 7% lower than that of the Filament C/P counterpart. It has been found from the ablation test using arc plasma torch flame that the erosion rate is 14% higher than that of the Filament C/P counterpart. Consequently, all the experimental results suggest that use of spun Yarn type carbon fabrics heat-treated at low carbonization temperature as reinforcement in a phenolic composite may significantly contribute to improving the interfacial, thermal, and ablative properties of C/P composites.
Ch. Cherif - One of the best experts on this subject based on the ideXlab platform.
-
Carbon Filament Yarn-based hybrid Yarn for the heating of textile-reinforced concrete
Sage, 2019Co-Authors: M. M. B. Hasa, Offerma M., Haup M., Nocke A., Ch. CherifAbstract:In this study, the application of carbon Filament Yarn (CFY)-based conductive hybrid Yarn as the heating element in a textile-reinforced concrete structure is reported. For this purpose, a hybrid Yarn having a core-sheath structure (the core is made of carbon Filament Yarn and the sheath consists of a mixture of short glass and polypropylene fibres) is manufactured by DREF-2000 spinning technique and integrated into textile structure by tailored fibre placement method. Heat can be generated in the concrete structure by passing electric current through the conductive carbon Filament Yarn core of the hybrid Yarn using the principle of resistive heating, where the sheath acts as the protection and isolation layer. From the initial investigations made on a small concrete specimen, important information is gathered and a large concrete slab with integrated conductive hybrid Yarn is manufactured. The heat ability and the comfort level of the manufactured concrete slab are measured. The investigations have revealed the potential of using such hybrid Yarn for a pointwise heating of the concrete surface for possible appliance in outdoor furniture
-
carbon fibre reinforced thermoplastic composites developed from innovative hybrid Yarn structures consisting of staple carbon fibres and polyamide 6 fibres
Composites Science and Technology, 2018Co-Authors: M M Hasa, S Nitsche, Anwa Abdkade, Ch. CherifAbstract:Abstract With the increased demand and usage of carbon fibre reinforced composites (CFRP), effective methods to reuse waste carbon fibres (CF), which are recoverable either from manufacturing waste or from end-of-life components, are attracting growing attention. In this paper, the development of innovative core-sheath hybrid Yarn structures consisting of staple CF and polyamide 6 (PA 6) fibres of 60 mm lengths using a DREF-3000 friction spinning machine with varying machine parameters, such as core to sheath ratio and suction air pressure, is described. Furthermore, uni-directional (UD) CFRP were manufactured based on the developed hybrid Yarns, and the influence of the processing parameters on tensile properties and CF content of the composites was analysed. UD composites manufactured from the developed hybrid Yarns possess approximately at least 86% of the tensile strength and Young's modulus of composites produced from virgin CF Filament Yarn.
-
development of new hybrid Yarn construction from recycled carbon fibers for high performance composites part i basic processing of hybrid carbon fiber polyamide 6 Yarn spinning from virgin carbon fiber staple fibers
Textile Research Journal, 2016Co-Authors: Marti Hengsterma, Anwa Abdkade, M M Hasa, N Raithel, Ch. CherifAbstract:The availability of a considerable amount of waste carbon fiber (CF) and the increased pressure to recycle/reuse materials at the end of their life cycle have put the utilization of recycled CF (rCF) under the spotlight. This article reports the successful manufacturing of hybrid Yarns consisting of staple CF cut from virgin CF Filament Yarn and polyamide 6 fibers of defined lengths (40 and 60 mm). Carding and drawing are performed to prepare slivers with improved fiber orientation and mixing for the manufacturing of hybrid Yarns. The slivers are then spun into hybrid Yarns on a flyer machine. The investigations reveal the influence of fiber length and mixing ratio on the quality of the card web, slivers and on the strength of the hybrid Yarns. The findings based on the results of this research work will help realize value-added products from rCF on an industrial scale in the near future.
Sheilla Atieno Odhiambo - One of the best experts on this subject based on the ideXlab platform.
-
discharge characteristics of poly 3 4 ethylene dioxythiophene poly styrenesulfonate pedot pss textile batteries comparison of silver coated Yarn electrode devices and pure stainless steel Filament Yarn electrode devices
Textile Research Journal, 2014Co-Authors: Sheilla Atieno Odhiambo, Anne Schwarz, Carla Hertleer, Lieva Van LangenhoveAbstract:This paper investigates textile-based energy storage devices fabricated with poly(3,4-ethylene dioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as an electro-active polymer and conductive Yarns as the electrodes. The conductive Yarns are sewn into a textile substrate and then coated with PEDOT:PSS systematically. Two different sets of devices were made. A comparison of the devices made with silver coated polybenzoxazol Filament Yarns and the devices made with pure stainless steel Filament Yarns is performed. The devices were charged and their self-discharge was measured by voltage decay. A study of the influence of charging time on the decay and the effect brought by various load resistors on the voltage decay is also performed. In this research, the devices with electrodes of pure stainless steel Filaments Yarns performed better than the devices with silver coated Yarns; this outcome has been reported as standard by various researchers.
Jong Kyoo Park - One of the best experts on this subject based on the ideXlab platform.
-
a comparison of the interfacial thermal and ablative properties between spun and Filament Yarn type carbon fabric phenolic composites
Carbon, 2004Co-Authors: Jong Kyoo Park, Tae Jin KangAbstract:Abstract In the present paper, the interfacial, thermal, and ablative properties of phenolic composites reinforced with spun Yarn type carbon fabrics (spun C/P composite) and Filament Yarn type carbon fabrics (Filament C/P composite) heat-treated at 1100 °C have been extensively compared. The interlaminar shear strength, crack growth rate, and fracture surface were studied to evaluate the interfacial characteristics of the composites using short-beam shear test, double cantilever beam test, and scanning electron microscopy, respectively. The thermal conductivity and the coefficient of thermal expansion were also measured in the longitudinal and transverse directions, respectively. To explore the ablative characteristics of the composites in terms of insulation index, erosion rate, and microscopic pattern of ablation, an arc plasma torch was used. The interfacial properties of the spun C/P composite are significantly greater than those of the Filament C/P composite, with qualitative support of fracture surface observations. It has been investigated that the presence of protruded fibers in the phenolic matrix of the spun C/P composite may play an important role in enhancing the properties due to a fiber bridging effect. The longitudinal thermal conductivity of the spun C/P composite is about 7% lower than that of the Filament C/P counterpart. It has been found from the ablation test using arc plasma torch flame that the erosion rate is 14% higher than that of the Filament C/P counterpart. Consequently, all the experimental results suggest that use of spun Yarn type carbon fabrics heat-treated at low carbonization temperature as reinforcement in a phenolic composite may significantly contribute to improving the interfacial, thermal, and ablative properties of C/P composites.
Lieva Van Langenhove - One of the best experts on this subject based on the ideXlab platform.
-
discharge characteristics of poly 3 4 ethylene dioxythiophene poly styrenesulfonate pedot pss textile batteries comparison of silver coated Yarn electrode devices and pure stainless steel Filament Yarn electrode devices
Textile Research Journal, 2014Co-Authors: Sheilla Atieno Odhiambo, Anne Schwarz, Carla Hertleer, Lieva Van LangenhoveAbstract:This paper investigates textile-based energy storage devices fabricated with poly(3,4-ethylene dioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as an electro-active polymer and conductive Yarns as the electrodes. The conductive Yarns are sewn into a textile substrate and then coated with PEDOT:PSS systematically. Two different sets of devices were made. A comparison of the devices made with silver coated polybenzoxazol Filament Yarns and the devices made with pure stainless steel Filament Yarns is performed. The devices were charged and their self-discharge was measured by voltage decay. A study of the influence of charging time on the decay and the effect brought by various load resistors on the voltage decay is also performed. In this research, the devices with electrodes of pure stainless steel Filaments Yarns performed better than the devices with silver coated Yarns; this outcome has been reported as standard by various researchers.