A novel approach to preparing carbon nanotube reinforced thermoplastic polymer composites

Li, Zhong‐Ming; Li, Sha-Ni; Yang, Ming‐Bo; Huang, Rui

doi:10.1016/j.carbon.2005.04.037

Cited by 30 publications

(17 citation statements)

References 10 publications

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“…Composites containing conductive fibers have lower percolation thresholds than the ones having spherical conductive particles [13,14]. Microfiber reinforced conductive polymer composites are generally prepared by extrusion of an incompatible thermoplastic polymer pair with conductive filler in which the conductive particles selectively locate in the dispersed polymer phase, and the dispersed polymer/conductive filler phase forms microfibers in situ by hot stretching [1,15,16]. In this method, polymer matrices should have a distinct dif- ference between their melting temperatures and melt viscosities.…”

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confidence: 99%

“…Polymer with higher melting point and lower melt viscosity is the dispersed phase in which the conductive filler particles distribute, and forms the microfibers in the matrix polymer with lower melting point. The electrical and mechanical properties of the composites are mainly affected by the amount, size, and distribution of the dispersed polymer/conductive filler microfibers in the matrix, processing conditions, hot-stretching speed, and molding temperature [17,18].Microfiber reinforcement has been proved to be a desirable method to improve the mechanical and electrical properties of polymer composites in contrast to the conventional melt mixing [1,15,16]. The composites, which are prepared by in situ microfiber reinforcement, have high electrical conductivity, lower percolation threshold and better mechanical properties, due to the selective localization of the conductive filler in microfiber phase, double percolation phenomena in a co-continuous polymer blend and reinforcement of microfibers.…”

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Effect of microfiber reinforcement on the morphology, electrical, and mechanical properties of the polyethylene/poly(ethylene terephthalate)/carbon nanotube composites

Yeşil

Köysüren

Bayram

2010

Polymer Engineering & Sci

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In situ microfiber reinforced conductive polymer composites consisting of high-density polyethylene (HDPE), poly(ethylene terephthalate) (PET), and multiwalled carbon nanotube (CNT) were prepared in a twin screw extruder followed by hot stretching of PET/CNT phase in HDPE matrix. For comparison purposes, the HDPE/PET blends and HDPE/PET/CNT composites were also produced without hot stretching. Extrusion process parameters, hot-stretching speed, and CNT amount in the composites were kept constant during the experiments. Effects of PET content and molding temperature on the morphology, electrical, and mechanical properties of the composites were investigated. Morphological observations showed that PET/CNT microfibers were successfully formed in HDPE phase. Electrical conductivities of the microfibrillar composites were in semi-conductor range at 0.5 wt% CNT content. Microfiber reinforcement improved the tensile strength of the microfibrillar HDPE/PET/CNT composites in comparison to that of HDPE/PET blends and HDPE/ PET/CNT composites prepared without hot stretching POLYM. ENG. SCI., 50:2093-2105, 2010. ª 2010 Society of Plastics Engineers INTRODUCTIONRecently, there is a great interest in industry on electrically semiconductor materials with superior mechanical properties and thermal stability [1]. Especially, conductive polymer composites have received significant attention for use in various engineering applications such as sensors, antistatic coatings, electromagnetic interference shielding, and electrolytes in the fuel cells [2,3]. They are generally a synergetic combination of conductive filler and insulating polymer matrix. They exhibit a series of unique features, such as a percolation phenomenon, sensitivity to pressure, temperature and gas, improved mechanical and thermal properties.Conductive polymer composites are usually prepared by incorporating conductive fillers into polymer matrix through melt mixing either by using an extruder or an internal mixer. However, to obtain high electrical conductivity with this method, high loadings of the conductive fillers are usually required, which may result in poor mechanical properties and high cost [4][5][6][7][8]. In the literature, several processing techniques have been used to lower the percolation threshold, in which electrical conductivity of composite increases by several orders of magnitude with the formation of current conductive structures [2]. These techniques are in situ polymerization of the polymer in the presence of conductive particles [9] and selective localization of conductive filler in one of the phases or at the interface of a polymer blend composed of two polymer constituents, in which filler forms the conductive network in the dispersed phase. This phase also constitutes continuous conductive structure in the major phase, which is called as double percolation [10][11][12]. However, in situ polymerization technique is hard to apply in the industrial scale, and in the second technique the incompatible nature of the polymer constituents of th...

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Effect of microfiber reinforcement on the morphology, electrical, and mechanical properties of the polyethylene/poly(ethylene terephthalate)/carbon nanotube composites

Yeşil

Köysüren

Bayram

2010

Polymer Engineering & Sci

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“…After cooling to room temperature, the mixture was vacuum-filtered through a 0.22 µm membrane and was thoroughly washed several times with DMF. The filtered solid was then dried in a vacuum oven at 90 °C for 24 hours, 27,28 . …”

Section: Preparation Of Poly-composites Of Mwcnt-cooh With Opdamentioning

confidence: 99%

New strategy for chemically attachment of Amide group on Multi-walled Carbon Nanotubes surfaces: synthesis, characterization and study of DC electrical conductivity

Obeid¹,

Al‐Shuja'a²,

El-Shekeil³

et al. 2018

10.5267/j.ccl

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A new method of amidation of Carboxy Multi Walled Carbon Nanotubes (MWCNT-COOH) with diamine monomer such as ethylene diamine (EDA) and O-Phenylenediamine (OPDA) was applied by using a solution blending technique. The structure and properties of these composites have been investigated by FTIR, SEM, TEM, XRD, UV, DSC and TGA. The formation of Poly [MWCNT/ Amide] composites was confirmed and the DC electrical conductivity of poly-composites was in the range 4.5×10 -6 -5.3×10-6 S/cm due to the interaction between the nanotubes.

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“…After cooling to room temperature, the mixture was vacuum-filtered through a 0.22 µm membrane and was thoroughly washed several times with THF. The filtered solid was then dried overnight in a vacuum oven at 90˚C [20] [21].…”

Section: Preparation Of Poly (Imine)/mwcnt Compositesmentioning

confidence: 99%

New Strategy for Chemically Attachment of Imine Group on Multi-Walled Carbon Nanotubes Surfaces: Synthesis, Characterization and Study of DC Electrical Conductivity

Al‐Shuja'a¹,

Obeid²,

El-Shekeil³

et al. 2017

MSCE

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This paper used a new approach of preparing poly-composites by covalent linkage between the MWCNT's by imine group. The Poly (Imine)/MWCNT Composite was synthesized by the solution blending method from reacted amino multi-walled carbon nanotubes (MWCNT-NH 2 ) with Terephthalaldehyde (TPAL). The obtained poly-composite was characterized by FT-IR, UV-Vis, XRD, TEM, SEM, TGA, DSC and DC electrical conductivity. The formation of Poly (Imine)/MWCNT composite was confirmed. The DC electrical conductivity of poly-composites was within the range 2.3 × 10 −4 -5.3 × 10 −4 S/cm due to the interaction between the nanotubes.

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A novel approach to preparing carbon nanotube reinforced thermoplastic polymer composites

Cited by 30 publications

References 10 publications

Effect of microfiber reinforcement on the morphology, electrical, and mechanical properties of the polyethylene/poly(ethylene terephthalate)/carbon nanotube composites

Effect of microfiber reinforcement on the morphology, electrical, and mechanical properties of the polyethylene/poly(ethylene terephthalate)/carbon nanotube composites

New strategy for chemically attachment of Amide group on Multi-walled Carbon Nanotubes surfaces: synthesis, characterization and study of DC electrical conductivity

New Strategy for Chemically Attachment of Imine Group on Multi-Walled Carbon Nanotubes Surfaces: Synthesis, Characterization and Study of DC Electrical Conductivity

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