Microstructure and Multiwall Carbon Nanotube Partitioning in Polycarbonate/Acrylonitrile-Butadiene-Styrene/Multiwall Carbon Nanotube Nanocomposites

The effects of carbonaceous nanoparticles, such as graphene (GNP) and multiwall carbon nanotube (CNT) on the mechanical and electrical properties of acrylonitrile–butadiene–styrene (ABS) nanocomposites have been investigated. Samples with various filler loadings were produced by solvent free process. Composites ABS/GNP showed higher stiffness, better creep stability and processability, but slightly lower tensile strength and electrical properties (low conductivity) when compared with ABS/CNT nanocomposites. Tensile modulus, tensile strength and creep stability of the nanocomposite, with 6 wt % of GNP, were increased by 47%, 1% and 42%, respectively, while analogous ABS/CNT nanocomposite showed respective values of 23%, 12% and 20%. The electrical percolation threshold was achieved at 7.3 wt % for GNP and 0.9 wt % for CNT. The peculiar behaviour of conductive CNT nanocomposites was also evidenced by the observation of the Joule’s effect after application of voltages of 12 and 24 V. Moreover, comparative parameters encompassing stiffness, melt flow and resistivity were proposed for a comprehensive evaluation of the effects of the fillers.

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Fatigue Performance of Multiwall Carbon Nanotube Composite PMMA and ABS

Volume 13: Nano-Manufacturing Technology; and Micro and Nano Systems, Parts A and B ◽

10.1115/imece2008-67578 ◽

2008 ◽

Cited By ~ 1

Author(s):

Daniel R. Bortz ◽

Matthew Weisenberger ◽

Brock Marrs ◽

Rodney Andrews

Keyword(s):

Fatigue Life ◽

Carbon Nanotube ◽

Fatigue Testing ◽

Acrylonitrile Butadiene Styrene ◽

Weibull Model ◽

Multiwall Carbon Nanotube ◽

Melt Mixing ◽

Critical Crack ◽

Pmma Matrix ◽

Multiwall Carbon

Poly (methyl methacrylate) (PMMA) and acrylonitrile-butadiene-styrene (ABS) – multiwall carbon nanotube (MWNT) and chopped carbon fiber (CCF) composites were prepared by a melt mixing protocol at various concentrations. Specimens were fabricated and tested using constant amplitude-of-deflection fatigue testing. The numbers of cycles to failure were recorded and analyzed using the linear version of the 2-parameter Weibull model. In the PMMA matrix, the 1.0vol% MWNT reinforced composites outperformed the neat PMMA matrix by +396% while the 1.0vol% CCF composites increased fatigue life by +198% over the control. The increase in fatigue life may be attributed to the nanoscale dimensions of the MWNTs. This enables them to directly interact with the matrix at the sub-micron scale where damage such as crazing begins, which ultimately initiates a critical crack that leads to failure of the specimen. The ABS composite specimens did not show any increase in fatigue life. The underlying reasons for the lack of fatigue improvement remain unclear.

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All-Fiber Pyro- and Piezo-electric Nanogenerator for IoT Based Self-Powered Health-Care Monitoring

Materials Advances ◽

10.1039/d1ma00131k ◽

2021 ◽

Author(s):

Biswajit Mahanty ◽

Sujoy Kumar Ghosh ◽

Kuntal Maity ◽

KRITTISH ROY ◽

Subrata Sarkar ◽

...

Keyword(s):

Health Care ◽

Carbon Nanotube ◽

Vinylidene Fluoride ◽

Electrospun Nanofibers ◽

Multiwall Carbon Nanotube ◽

Poly Vinylidene Fluoride ◽

Self Powered ◽

Health Care Monitoring ◽

Multiwall Carbon ◽

Piezo Electric

In this work, an all-fiber pyro- and piezo-electric nanogenerator (PPNG) is designed by multiwall carbon nanotube (MWCNT) doped poly(vinylidene fluoride) (PVDF) electrospun nanofibers as the active layer and interlocked conducting...

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