Request pdf a comparative study of the thermoplastic polyurethanecarbon nanotube and natural rubbercarbon nanotube composites according to their mechanical and electrical properties the. Achieving large dielectric property improvement in poly. The polyolcnt suspensions were used to prepare in situ polymerized thermoplastic polyurethane tpucnt nanocomposites with the cnt. In this research, a multiwalled carbon nanotube and thermoplastic polyurethane system is used to study the dynamic percolation behaviour of the cnt conductive polymer composite, in an attempt to understand the relationship between the processing and the dynamic percolation. Creep of thermoplastic polyurethane reinforced with ozone functionalized carbon nanotubes y. Mechanical behavior of 3d printed multiwalled carbon.
Conductive network formation in the melt of carbon nanotube thermoplastic polyurethane composite rui zhang1,2, alice dowden1, mark baxendale2 and ton peijs1,3, 1queen mary, university of london, centre for materials research, school of engineering and materials science. Hyperbranched polyurethanefe3o4 nanoparticles decorated. Regarding the tensile behaviour, the comparison between performances of pure tpu films respect to those containing carbon nanotubes, has generally. Thermoplastic polyurethanesinglewalled carbon nanotube composites. A highly stretchable carbon nanotubes thermoplastic polyurethane fibershaped strain sensor with porous structure for human motion monitoring download full article now 15 december 2018 xiaozheng wang, hongling sun, xiaoyan yue, yunfei yu, guoqiang zheng, kun dai, chuntai liu, changyu shen. A highly stretchable carbon nanotubesthermoplastic. Proceedings of the asme 2017 conference on smart materials, adaptive structures and intelligent systems. Creating orientated cellular structure in thermoplastic polyurethane through strong interfacial shear interaction and supercritical carbon dioxide foaming for largely improving the foam compression performance. The present study investigated thermoplastic polyurethane tpu, natural rubber nr and their composites in terms of their mechanical and electrical properties for developing wearable stretch sensors. Bidirectional and stretchable piezoresistive sensors enabled. Pdf carbon nanotubes cnts have long been recognized as the stiffest and.
Achieving large dielectric property improvement in polyethylene vinyl acetate thermoplastic polyurethanemultiwall carbon nanotube nanocomposites by tailoring phase morphology tingting zhang, jinghui yang, nan zhang, ting huang, and yong wang. Porosity and composition dependence on electrical and. Thermoplastic polyurethane, functionalized multiwalled carbon nanotube, spray coating, buckypaper. Christ, 1 nahal aliheidari, 1 petra potschke, 2 and amir ameli 1. Magnetic carbonnanotube thermoplastic polyurethane. Thermoplastic polyurethane elastomer nanocomposites. Highly stretchable multiwalled carbon nanotubethermoplastic. Conductive network formation in the melt of carbon. Piezoresistive behaviour of additively manufactured multi. Thermoplastic polyurethane elastomer tpu is used as an encapsulant in undersea sonar devices. Homogeneous dispersion of cnts was achieved through the skeleton of the foam, and an ultralow percolation threshold of 0. Remotely actuated polymer nanocompositesstressrecovery.
Upon irradiation, cnts were responsible for a local temperature increasing spot on the surface of tpu granules, promoting the molecular diffusion among tpu only in the interface region without damaging the segregated structure. Preparation and properties of 3d graphenemulti walled carbon. Polyurethane foam coated with a multiwalled carbon nanotube. Preparation and characterization of polyurethanemulti. Scanning electron microscope sem and transmission electron microscope tem showed that the unmodified mwnt were. Polyurethane foam coated with a multiwalled carbon nanotube polyaniline nanocomposite for a skinlike stretchable array of multifunctional sensors. The porous structure has significantly reduced the density to approximately 0. Mechanical behavior of 3d printed multiwalled carbon nanotubethermoplastic polyurethane nanocomposites. Mechanical behavior of 3d printed multiwalled carbon nanotube.
A comparative study of the thermoplastic polyurethanecarbon. Electrical conductivity and piezoresistive response of 3d. Conductive network formation in the melt of carbon nanotubethermoplastic polyurethane composite. Reinforced thermoplastic natural rubber tpnr composites. Firstly, the contribution of mwcnts to the melt shear viscosity and the pressurevolumetemperature pvt behavior was investigated. Creep of thermoplastic polyurethane reinforced with ozone.
Introduction to polyurethanes although the reaction between isocyanate and hydroxyl compounds was originally identified in the 19th century, the foundations of the polyurethanes industry were laid in the late 1930s with the discovery, by otto bayer, of the. Preparation and properties of 3d graphenemulti walled. Polyurethane foam coated with a multiwalled carbon nanotube polyaniline nanocomposite for a skin. Hohimer, cameron, aliheidari, nahal, mo, changki, and ameli, amir. Fabrication of high content carbon nanotubepolyurethane sheets. Plasticyl is a family of multiwall carbon nanotubes mwcnts thermoplastic concentrates for applications requiring superior electrical conductivity and electrostatic discharge esd properties. Zhang2,3 1cas key laboratory of mechanical behavior and design of materials, department of modern mechanics, university of science and technology of china, 230027 hefei, china. Considering the obtained results, the dynamic stiffness of thermoplastic polyurethane and its capacity to isolate vibration can be adjusted by controlling the proportion of multiwalled carbon. Formulations with the addition of nanoclays and carbon nanofibers in a neat thermoplastic polyurethane elastomer tpu were meltcompounded using twinscrew extrusion. Pdf magnetic carbonnanotube thermoplastic polyurethane. Thermoplastic polyurethane tpusinglewalled carbon nanotube swcnt nanocomposite films were prepared using 1,6hexane diisocyanate and hydroxylterminated polybutadiene htpb in.
This is a surprising behavior in comparison with the results for the 1 mass% nanotube composites. Morphology and electrical conductivity of compatibilized. Pdf deformationmorphology correlations in electrically. Shanks school of applied sciences, rmit university, po box 2476v, melbourne, vic 3001, australia, robert. Preparation and properties of functional modification reduced graphene oxide carbon nanotubes thermoplastic polyurethane composite films ou zhongxing, zheng yuying, xiao dongsheng, cao ningning materials science and engineering college. In order to enhance their chemical affinity to polymer matrices, chemically modifying the graphitic sidewalls and tips is necessary. Thermoplastic polyurethane tpu composites containing carbon nanotube cnt with the loading ratios from 0. Flexible and lightweight carbon nanotube cntthermoplastic polyurethane tpu conductive foam with a novel aligned porous structure was fabricated.
To do so, carbon nanotubes cnts were used as microwave absorbers in the thermoplastic polyurethane tpu media. In this study, the structureproperty relationships in thermoplastic polyurethane tpu filled with multiwalled carbon nanotubes mwcnts were investigated. The new method enables the formation of fibers with 40% ww of nanotubes in a polymer. The low density and high aspect ratio, together with their exceptional mechanical, electrical and thermal properties, render carbon nanotubes as a good reinforcing. Bidirectional and stretchable piezoresistive sensors enabled by multimaterial 3d printing of carbon nanotubethermoplastic polyurethane nanocomposites josef f. Investigating mechanical, thermal, and flammability. Here, we report a novel highly sensitive wearable strain sensor based on a highly stretchable multiwalled carbon nanotube mwcnt thermoplastic polyurethane tpu fiber obtained via a wet spinning process. Thermoplastic polyurethane tpu based conductive polymer composites cpcs with a reduced percolation threshold and tunable resistancestrain sensing behavior were obtained through the addition of synergistic carbon nanotubes cnt and graphene bifillers.
The mwcnttpu fiber showed the highest tensile strength and ultrahigh sensitivity with a gauge factor gf of approximately 2800 in the strain range of 5100%. Flexible and lightweight carbon nanotube cnt thermoplastic polyurethane tpu conductive foam with a novel aligned porous structure was fabricated. Multiwalled carbon nanotubes mwcnts dispersed in thermoplastic polyurethane tpu, which is flexible and pliable, were used to form. Highly stretchable electromagnetic interference emi. Oct 02, 2012 thermoplastic polyurethane tpusinglewalled carbon nanotube swcnt nanocomposite films were prepared using 1,6hexane diisocyanate and hydroxylterminated polybutadiene htpb in. Multiwalled carbon nanotubes mwcnts functionalized with amine and carboxyl groups were used to prepare polyurethane mwcnt nanocomposites in two distinct concentrations. Article information, pdf download for investigating mechanical. Preparation and properties of functional modification. Obviously, the mechanical and thermal properties of the nanocomposites are improved with increasing the cnt content.
Investigation of structureproperty relationships in. Chemorheology of thermoplastic polyurethane and thermoplastic. View the article pdf and any associated supplements and figures for a period of 48 hours. Magnetic carbonnanotube thermoplastic polyurethane composites. Advances in thermoplastic polyurethane composites reinforced.
On the tensile tests of polyurethane and its composites. Jan 29, 2016 the polyolcnt suspensions were used to prepare in situ polymerized thermoplastic polyurethane tpucnt nanocomposites with the cnt concentration of. The effect of nanofillers on reaction is an important factor during insitu nanocomposite preparation. Keywords thermoplastic polyurethane, carbon nanotubes, extrusion, flame. The low density and high aspect ratio, together with their exceptional mechanical, electrical and thermal properties, render carbon. Thermoplastic polyurethane s mechanical properties and vibration isolation properties were improved with the addition of multiwalled carbon nanotubes. Electrical conductivity and thermal properties of functionalized carbon nanotubes polyurethane composites for 4 hours. Enhanced performance of 3d printed highly elastic strain. Ultrahigh compressibility has been observed in the lightweight porous carbon nanotube cnt thermoplastic polyurethane tpu nanocomposites prepared by the thermally induced phase separation tips technique. Both tpu and nr were added 2 %wt multiwall carbon nanotube mwcnt, then in order to test their influences on tpucnt and nrcnt composites. Pdf conductive network formation in the melt of carbon. Carbon nanotubes thermoplastic polyurethane nanocomposites fabricated using a joint co.
The research will be useful in making cntstpu nanocomposites applicable in the fields where high solid particle erosion resistances are required. Figure 12 shows how decreasing the level of carbon nanotubes, from mix a to mix f, with mix a having the richest in cnts and mix f being the poorest carbon nanotube loadings, affects the volume resistivity of the molded isolators. Zhao liangcheng, li bin, wu sirui, li zhongming, li qin. Faculty of chemical engineering, kunming university of science and technology, kunming 650500, china. The content of mwnt filled in tpu was increased till 40phr parts per hundreds of rubber. Since the already published data about the effect of carbon nanotubes addition to polymer matrix are somewhat contradictory, great care was taken to understand the. However, only very small amounts of cnts are required to improve the properti es of the polymer. Reinforced thermoplastic natural rubber tpnr composites with different types of carbon nanotubes mwnts 445 the processability of the composites. Thermoplastic carbon nanotube composites prevent high voltage. Thanks to the 8 times higher content of nanotubes than previously reported for such composites, over an order of magnitude higher electrical.
The presence of fe 3 o 4 nanoparticles on the surface of the mwcnts was confirmed by xray diffraction and transmission electron microscopic studies. The sensors were then subjected to a series of cyclic strain loads. Thermoplastic polyurethanesinglewalled carbon nanotube. Effect of carbon nanotube dispersion and network formation on.
The buckypaper composite behavior can be a consequence of the high thermal conductivity. Magnetic carbon nanotube thermoplastic polyurethane composites i. Request pdf a comparative study of the thermoplastic polyurethanecarbon nanotube and natural rubber carbon nanotube composites according to their mechanical and electrical properties the. Pdf electrically conductive strain sensing polyurethane.
Carbon nanotube cnt thermoplastic elastomer morthane nanocomposites demonstrate all three opportunities with regard to imparting enhanced stress recovery, i and ii above, with novel. The invention relates to thermoplastic polyurethane containing carbon nanotubes. Carbon nanotubes a cocoagulation method combined with hot pressing technique is successfully applied to fabricate thermoplastic polyurethane tpu nanocomposites with different contents of carbon nanotubes cnts. Pure thermoplastic polyurethane tpu and tpumultiwall carbon nanotubes mwcnt nanocomposites were 3d printed in tandem using a lowcost multimaterial fdm printer to fabricate uniaxial and biaxial strain sensors with conductive paths embedded within the insulative tpu platform. Thermoplastic polyurethane tpu composites containing carbon nanotube. A melt blending process was employed to prepare nanocomposites based on thermoplastic polyurethane tpu and multiwalled carbon nanotubes mwnt. In order to fabricate desirable composites for underwater a tpu grafted mwcnt tpugmwcnt were prepared to fabricate a composite that has better mechanical strength and interfacial adhesion between the tpu matrix and the mwcnts. Processproperties relationships of thermoplastic polyurethane based materials filled with carbon nanotubes dynamic and steadystate shear viscosity see, for example, fig. Magnetic carbonnanotube thermoplastic polyurethane composites january 2011 conference. Pdf thermoplastic polyurethanesinglewalled carbon nanotube. Sep 02, 2016 insitu polymerization of thermoplastic polyurethane tpu and carbon nanotubes cnts is one of the best methods to obtain nanocomposites with well dispersed nanofillers and superior properties. Hyperbranched polyurethane fe 3 o 4 nanoparticles decorated multiwalled carbon nanotube fe 3 o 4mwcnt nanocomposites were prepared by the in situ polymerization technique. Pdf thermoplastic polyurethane tpusinglewalled carbon nanotube swcnt nanocomposite films were prepared using 1,6hexane. Electrical, rheological and electromagnetic interference shielding properties of thermoplastic polyurethane carbon nanotube composites.
Results of rotational rheological measurements and ultravioletvisible uv. The nanocomposites prepared with a sonication time of 16 min and. Neat polyurethane pu specimens and composites of polyurethane with variable amounts of multiwalled carbon nanotubes mwcnts were subjected to tensile tests, stress relaxation tests, and strain rate jumps. The tpu nanocomposites tpuns are proposed to replace kevlarfilled ethylenepropylenedienemonomer rubber, the current stateoftheart solid rocket motor internal insulation. Polyurethane foam coated with a multiwalled carbon. Thanks to the 8 times higher content of nanotubes than previously reported for such composites, over an order of magnitude higher electrical conductivity is also observed. The mwcnttpu fiber showed the highest tensile strength and ultrahigh sensitivity with a gauge factor gf of approximately 2800 in the. Ultrahigh compressibility has been observed in the lightweight porous carbon nanotube cntthermoplastic polyurethane tpu nanocomposites prepared by the thermally induced phase separation tips technique. Characteristics of thermoplastic polyurethane composites. Achieving large dielectric property improvement in polyethylene vinyl acetatethermoplastic polyurethanemultiwall carbon nanotube nanocomposites by tailoring phase morphology tingting zhang, jinghui yang, nan zhang, ting huang, and yong wang.
Jan 25, 2004 carbon nanotube cntthermoplastic elastomer morthane nanocomposites demonstrate all three opportunities with regard to imparting enhanced stress recovery, i and ii above, with novel. Insitu polymerization of thermoplastic polyurethane tpu and carbon nanotubes cnts is one of the best methods to obtain nanocomposites with well dispersed nanofillers and superior properties. Investigating mechanical, thermal, and flammability properties of. Enhanced solid particle erosion properties of thermoplastic. Flexible and lightweight pressure sensor based on carbon. Rheological properties of thermoplastic polyurethanemulti. The density of the aligned porous material was as low as 0.
Pdf advances in thermoplastic polyurethane composites. Wo2005082988a1 thermoplastic polyurethane containing. From nanoscale to macroscale addresses the advances in nanotechnology that have led to the development of a new class of composite materials known as cntreinforced polymers. The following paper presents a simple, inexpensive and scalable method of production of carbon nanotube polyurethane elastomer composite. Remotely actuated polymer nanocompositesstressrecovery of.
Dynamic mechanical characterization of polyurethane. Nanotech, clean technology, microtech, bio nanotech. Preparation and properties of 3d graphenemulti walled carbon nanotube thermoplastic polyurethane composites. Plasticyl tpu1001 is a conductive masterbatch based on thermoplastic polyurethane resin loaded with 10% of nanocyls mwcnts nc7000. Conductive network formation in the melt of carbon nanotube. Piezoresistive behavior of porous carbon nanotubethermoplastic polyurethane conductive nanocomposites with ultrahigh compressibility hu liu,1,2 wenju huang,1 jiachen gao,1 kun dai,1,a guoqiang zheng,1 chuntai liu,1,a changyu shen,1 xingru yan,2 jiang guo,2 and zhanhu guo 2,a. In this work, a highperformance strain sensor of carbon nanotube thermoplastic polyurethane cnttpu nanocomposites was printed by fused deposition modeling fdm, and 1pyrenecarboxylic acid pca was introduced to noncovalently modify the cnts and improve the polymernanofiller interactions. Surfaces of the cnt particles were treated with sulfuric acidnitric acid to purify cnt and to achieve compatible surface characteristics between tpu matrix and cnt. Magnetic carbonnanotube thermoplastic polyurethane composites i. Electrical, rheological and electromagnetic interference. In the present work, rheological behavior of thermoplastic polyurethane filled with various amounts 1, 3 and 5 wt. Highly conductive carbon nanotubethermoplastic polyurethane.
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