Study on mechanical, morphological and electrical properties of carbon nanofiber/polyetherimide composites

Kumar, Sandeep; Rath, Tanmoy; Mahaling, Ram Naresh; Reddy, Chaganti Srinivasa; Das, C. K.; Pandey, Kailash N.; Srivastava, Ravi B.; Yadaw, S. B.

doi:10.1016/j.mseb.2007.06.002

Cited by 122 publications

(58 citation statements)

References 50 publications

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“…This fall in the modulus is attributed to an energy dissipation phenomenon involving cooperative motions of the polymer chains [44]. It is evident that the incorporation of CNTs induces a remarkable increase in the storage modulus of the matrix at temperatures below the glass transition, which becomes worthless at higher temperatures.…”

Section: Dynamic Mechanical Propertiesmentioning

confidence: 98%

The influence of a compatibilizer on the thermal and dynamic mechanical properties of PEEK/carbon nanotube composites

Díez‐Pascual¹,

Naffakh²,

Gómez³

et al. 2009

Nanotechnology

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The influence of a compatibilizer on the thermal and dynamic mechanical properties of PEEK/carbon nanotube composites Díez-Pascual, A. M.; Naffakh, M.; Gómez, M. A.; Marco, C.; Ellis, G.; González-Domínguez, J. M.; Ansón, A; Martínez, M. T.; Martínez-Rubi, Y.; Simard, B.; Ashrafi, B. AbstractThe effect of polyetherimide (PEI) as a compatibilizing agent on the morphology, thermal, electrical and dynamic mechanical properties of poly(ether ether ketone) (PEEK)/single-walled carbon nanotube (SWCNT) nanocomposites, has been investigated for different CNT loadings. After a pre-processing step based on ball milling and pre-mixing under mechanical treatment in ethanol, the samples were prepared by melt extrusion. A more homogeneous distribution of the CNTs throughout the matrix is found for composites containing PEI, as revealed by scanning electron microscopy. Thermogravimetric analysis demonstrates an increase in the matrix degradation temperatures under dry air and nitrogen atmospheres with the addition of SWCNTs; the level of thermal stability of these nanocomposites is maintained when PEI is incorporated. Both differential scanning calorimetry and synchrotron x-ray scattering studies indicate a slight decrease in the crystallization temperatures of the compatibilized samples, and suggest the existence of reorganization phenomena during the heating, which are favoured in the composites incorporating the compatibilizer, due to their smaller crystal size. Dynamic mechanical studies show an increase in the glass transition temperature of the nanocomposites upon the addition of PEI. Furthermore, the presence of PEI causes an enhancement in the storage modulus, and hence in the rigidity of these systems, attributed to an improved interfacial adhesion between the reinforcement and the matrix. The electrical and thermal conductivities of these composites decrease with the incorporation of PEI. Overall, the compatibilized samples exhibit improved properties and are promising for their use in industrial applications.

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Section: Dynamic Mechanical Propertiesmentioning

confidence: 98%

The influence of a compatibilizer on the thermal and dynamic mechanical properties of PEEK/carbon nanotube composites

Díez‐Pascual¹,

Naffakh²,

Gómez³

et al. 2009

Nanotechnology

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“…To tackle this problem, various methods have been investigated, such as modification of the external surface of zeolite particles, preparation of the composite material at the temperature of the polymer's glassy transition, and thermal treatment. Kumar et al 17 studied the mechanical, morphological, and electrical properties of poly(ether imide)-carbon nanofiber composite. They purified the carbon nanofibers, ball-milled and functionalized them, and treated their surfaces with plasma to decrease particle agglomeration and the generation of interfacial defects.…”

Section: Introductionmentioning

confidence: 99%

“…17,20 The influence of AC content on the structural changes in the polymeric phase was studied in relation to both the mechanical and permselective properties of this composite material. 14 reported the structural characteristics of the AC, namely, the surface area (3272 m 2 /g), pore size distribution (between 7 and 30 Å ), mean pore width size (21.7 Å ), high porosity (e ¼ 0.87), and particle size distribution (between 0.2 and 20 lm).…”

Section: Introductionmentioning

confidence: 99%

Effect of the particle size and particle agglomeration on composite membrane performance

Garcı́a

Marchese

Ochoa

2010

J of Applied Polymer Sci

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One of the most used methods for studying the rigidification of polymer matrices in composite membranes is differential scanning calorimetry. Glass-transition temperatures give information about filler-polymer interaction and the rigidity of the polymer matrix. In this study, optical microscopy, mechanical property testing, and X-ray diffraction, instead of differential scanning calorimetry, were used to study both poly(ether imide) (PEI) matrix rigidification and activated carbon-PEI interfacial adhesion. Then, the permselective properties of the mixed matrix membranes were interpreted. The change in rigidity in these composite membranes was in agreement with the decrease in the flexibility of the composite materials as the filler content increased. This fact was confirmed by the tension and elongation data and X-ray diffraction (DRX) measurements. However, the Young's modulus value decreased as the carbon content increased. There was an increase in all of the gas permeability coefficients measured in the composites compared with that of PEI. As the particle size grew, a low particle surface area and a poor interfacial adhesion were observed. The carbon agglomerates acted as sites of stress concentration within the polymeric matrix. This decreased the intercatenary distances and limited the movement of polymer chains, which resulted in a more rigid matrix. The higher selectivity of the H 2 /CH 4 , H 2 /CO 2 and O 2 /N 2 systems observed in the composite membranes revealed that there were both a preferential sorption of certain gases in the carbon surface or carbon-polymer interface and a molecular size exclusion, which were responsible for that increment, despite the poor interfacial adhesion.

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“…Some drawbacks include extremely low conductivity, atmospheric moisture absorption, and poor fluidity at high temperature, which greatly limits its application. Many efforts to improve its properties by adding carbon nanotubes (CNT) [1][2][3] or graphitic nanoplatelets (GNP) [4] into the matrix, or compositing with other special structure materials such as liquid crystalline polymer (LCP) [5,6] or carbon nanofibers (CNF) have been reported [7,8]. Carbon nanotubes have drawn large attention as "materials of the 21st century" due to their impressive physical and chemical properties since their serendipitous discovery in 1991 [9].…”

Section: Introductionmentioning

confidence: 99%

Superior Performance Nanocomposites from Uniformly Dispersed Octadecylamine Functionalized Multi-Walled Carbon Nanotubes

Chen

Jing

Ezzeddine

et al. 2015

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Polyetherimide (PEI) is a widely applied as engineering plastic in the electronics, aerospace, and automotive industries but the disadvantages of extremely low conductivity, atmospheric moisture absorption, and poor fluidity at high temperature limits its application. Herein, commercial multi-walled carbon nanotubes (MWCNTs) were modified with a long alkyl chain molecule, octadecylamine (ODA), to produce a uniform dispersion in commercial PEI matrices. Both covalent and noncovalent modification of MWCNTs with ODA, were prepared and compared. Modified MWCNTs were incorporated in PEI matrices to fabricate nanocomposite membranes by a simple casting method. Investigating mechanical properties, thermal stability, and conductivity of the polyetherimide (PEI)/MWCNT composites showed a unique combination of properties, such as high electrical conductivity, high mechanical properties, and high thermal stability at a low content of 1.0 wt % loading of ODA modified MWCNTs. Moreover, electrical resistivity decreased around 10 orders of magnitude with only 0.5 wt % of modified MWCNTs.

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Study on mechanical, morphological and electrical properties of carbon nanofiber/polyetherimide composites

Cited by 122 publications

References 50 publications

The influence of a compatibilizer on the thermal and dynamic mechanical properties of PEEK/carbon nanotube composites

The influence of a compatibilizer on the thermal and dynamic mechanical properties of PEEK/carbon nanotube composites

Effect of the particle size and particle agglomeration on composite membrane performance

Superior Performance Nanocomposites from Uniformly Dispersed Octadecylamine Functionalized Multi-Walled Carbon Nanotubes

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