Use of nanofiber in high-performance fluorinated elastomer – Processing, mechanical, electrical, swelling and morphology characteristics

2020 ◽  
pp. 002199832094893
Author(s):  
Felipe Gustavo Ornaghi ◽  
Heitor Luiz Ornaghi ◽  
Jordão Gheller ◽  
Marly Antônia Maldaner Jacobi
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Black ◽  
Carbon Nanofibers ◽  
High Performance ◽  
Hybrid Composites ◽  
Academic Research ◽  
Rubber Composites ◽  
Research Fields ◽  
Roll Mill ◽  
Internal Mixer

Property optimization is essential in both industrial and academic research fields. In this study, novel fluorinated rubber composites were manufactured with carbon nanofibers and compared to a standard control formulation (with 30 phr carbon black) and with carbon nanotubes. Hybrid composites with carbon nanotubes and/or nanofibers and carbon black were also produced. Also, two processing conditions (internal mixing and co-processing using an internal mixer followed by a two-roll mill) were tested in terms of the overall mechanical, morphological, electrical, dynamic mechanical, and swelling responses of the rubber composites. The results suggested a synergistic effect for both nanofillers and provided reinforcement and electrical conductivity due to filler-polymer interactions and the formation of a percolation threshold, respectively. Carbon nanofibers are an alternative to replace carbon nanotubes due to their lower cost and they are easier to be chemically modified.

scholarly journals Construction of a high-performance air-breathing cathode using platinum catalyst supported by carbon black and carbon nanotubes

2016 ◽  
Vol 41 (21) ◽  
pp. 9191-9196 ◽  
Author(s):  
Zi'ang Xiong ◽  
Shijun Liao ◽  
Sanying Hou ◽  
Haobin Zou ◽  
Dai Dang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Black ◽  
High Performance ◽  
Platinum Catalyst ◽  
Air Breathing

Contributions of Elastomer Behavior to Mechanisms of Carbon Black Dispersion

1984 ◽  
Vol 57 (1) ◽  
pp. 153-167 ◽  
Author(s):  
N. Nakajima ◽  
E. R. Harrell
Keyword(s):  
Carbon Black ◽  
Effective Means ◽  
High Stress ◽  
Flow State ◽  
Breakdown Mechanism ◽  
Roll Mill ◽  
Highly Stretchable ◽  
Internal Mixer ◽  
Region Ii ◽  
Carbon Black Dispersion

Abstract In order to achieve good mixing of elastomer and carbon black, the elastomer domains must be reduced in size, that is, the elastomer must be broken into smaller pieces. If this is the only requirement, Region I of the Tokita-White scheme may be most preferred, because the elastomer easily breaks up at this state. However, it is too stiff for compaction of the compound; that is, the elastomer is too stiff to conform to the complex topology of carbon black. If the compaction is the only requirement. Region IV is most preferred, because the material is in the melt-flow state. In reality, Region II, the rubbery, highly stretchable state gives the best result. It appears that the use of Region II is a compromise. However, there is a more important reason for the preference of Region II, that is, the effectiveness of this region for the breakdown of carbon black agglomerates. The breakdown mechanism involves elastomer as a medium for the transfer of force. The effectiveness of the elastomer medium depends on its ability to stretch with the development and maintenance of a high stress. The former may be characterized by the failure envelop and the latter by the stress relaxation experiments. In roll mill as well as internal mixer processing, the folding of compound and the subsequent stretching of it, e.g., lamination mechanism, are the effective means for carbon black dispersion. It is postulated that the lamination mechanism generates localized high shear fields, which force carbon black agglomerates to rotate in the high modulus medium; this results in peeling of the aggregates from the outer shells of the agglomerates.

Experimental Study on Thermal Conductivity Property of Rubber Composites Filled with Carbon Nanotubes

2011 ◽  
Vol 221 ◽  
pp. 373-376 ◽  
Author(s):  
Ze Peng Wang ◽  
Yan He
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Experimental Study ◽  
Carbon Black ◽  
Natural Rubber ◽  
Rubber Composites ◽  
Conductivity Property

Thermal conductivity of rubber composites filled with CNTs (carbon nanotubes) and N234 CB (carbon black) were investigated. Result indicated that Thermal conductivity of NR (natural rubber) filled with CNTs is higher than that of NR filled with CB in the case of the same filling amount. CNTs can better improve the performance of thermal conduct of rubber composites than CB. The more the filling content of CNTs is, the higher thermal conductivity of NR composites.

scholarly journals Enhancing electrical conductivity of multiwalled carbon nanotube/epoxy composites by graphene nanoplatelets

2018 ◽  
Vol 57 (4) ◽  
Author(s):  
Ieva Kranauskaitė ◽  
Jan Macutkevič ◽  
Anna Borisova ◽  
Alfonso Martone ◽  
Mauro Zarrelli ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Integrated Circuits ◽  
High Performance ◽  
Hybrid Composites ◽  
Graphene Nanoplatelets ◽  
Multiwalled Carbon ◽  
Temperature Range ◽  
Communication Devices ◽  
Hybrid Carbon

The need of high performance integrated circuits and high power density communication devices drives the development of materials enhancing the conductive performances by carbon nanoparticles. Among nanocomposites, the ternary hybrid carbon nanotubes/graphene nanoplatelets/polymer composites represent a debatable route to enhance the transport performances. In this study hybrid ternary nanocomposites were manufactured by direct mixing of multiwalled carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) at a fixed filler content (0.3 wt.%), but different relative combination, within an epoxy system. MWNT/epoxy nanocomposites were manufactured for comparison. The quality of dispersion was evaluated by optical and scanning electron microscopy (SEM). The electrical properties of hybrid composites were measured in the temperature range from 30 up to 300 K. The synergic combination of 1D/2D particles did not interfere with the percolative behaviour of MWCNTs but improved the overall electrical performances. The addition of a small amount of GNPs (0.05 wt.%) led to a strong increment of the sample conductivity over all the temperature range, compared to that of mono filler systems.

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