Wet vs. Dry Dispersion Methods for Multiwall Carbon Nanotubes in the High Graphite Content Phenolic Resin Composites for Use as Bipolar Plate Application

2015 ◽  
Vol 158 ◽  
pp. 1-6 ◽  
Author(s):  
Pattarakamon Chaiwan ◽  
Jantrawan Pumchusak
Keyword(s):  
Carbon Nanotubes ◽  
Phenolic Resin ◽  
Multiwall Carbon Nanotubes ◽  
Bipolar Plate ◽  
Resin Composites ◽  
Graphite Content ◽  
Multiwall Carbon ◽  
High Graphite

scholarly journals The Influence of Hydroxylated Carbon Nanotubes on Epoxy Resin Composites

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Jiaoxia Zhang ◽  
Yaping Zheng ◽  
Haijun Zhou ◽  
Jing Zhang ◽  
Jun Zou
Keyword(s):  
Carbon Nanotubes ◽  
Epoxy Resin ◽  
Surface Resistance ◽  
Multiwall Carbon Nanotubes ◽  
Resin Composites ◽  
Neat Resin ◽  
Ultrasonic Dispersion ◽  
Transmission Electron ◽  
Epoxy Resin Composites ◽  
Multiwall Carbon

Hydroxylated multiwall carbon nanotubes (MWNTs)/epoxy resin nanocomposites were prepared with ultrasonic dispersion and casting molding. The effect of hydroxylated MWNTs content on reactive activity of composites is discussed. Then the flexural and electrical properties were studied. Transmission electron microscope was employed to characterize the microstructure of nanocomposites. As a result, the reactive activity of nanocomposites obtained increases with the increasing content of MWNTs. When MWNTs content of the composites is 1 wt%, as compared to neat resin, the flexural strength increases from 143 Mpa to 156 MPa, the modulus increases from 3563 Mpa to 3691 MPa, and the volume and surface resistance of nanocomposites decrease by two orders of magnitude, respectively.

Electrical and Mechanical Properties of Surface Functionalized Carbon Nanotubes Incorporated Graphite-Phenolic Composite Bipolar Plate for PEMFC

2016 ◽  
Vol 707 ◽  
pp. 23-27
Author(s):  
Pattarakamon Chaiwan ◽  
Thapanee Sarakonsri ◽  
Jantrawan Pumchusak
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Proton Exchange Membrane ◽  
Multiwall Carbon Nanotubes ◽  
Strong Acid ◽  
Bipolar Plate ◽  
Proton Exchange ◽  
Bipolar Plates ◽  
Exchange Membrane ◽  
Multiwall Carbon

This research aims to study the effect of the functionalization of the multiwall carbon nanotubes (MWCNTs) on the mechanical property improvement of phenolic composites for bipolar plate applications in proton exchange membrane fuel cells (PEMFC). The MWCNTs were oxidized by strong acid and silanized by silane coupling agent in order to enhance the interfacial adhesion between the MWCNTs and matrix and were used as reinforcement in the phenolic composites. The silanized MWCNTs was found to improve the mechanical properties of the composites; however, they caused the decrease of electrical conductivity due to the wrapping of the MWCNTs with non-conductive silane molecules. Nevertheless, the conductivity of more than 100 S/cm is maintained to meet the DOE requirement of materials for use as bipolar plates.

Boehmite Nanofibers as a Dispersant for Nanotubes in an Aqueous Sol

2018 ◽  
Author(s):  
Gen Hayase
Keyword(s):  
Carbon Nanotubes ◽  
Aspect Ratio ◽  
Aqueous Solutions ◽  
High Aspect Ratio ◽  
Multiwall Carbon Nanotubes ◽  
Multiwall Carbon ◽  
Nanotube Films

By exploiting the dispersibility and rigidity of boehmite nanofibers (BNFs) with a high aspect ratio of 4 nm in diameter and several micrometers in length, multiwall-carbon nanotubes (MWCNTs) were successfully dispersed in aqueous solutions. In these sols, the MWCNTs were dispersed at a ratio of about 5–8% relative to BNFs. Self-standing BNF–nanotube films were also obtained by filtering these dispersions and showing their functionality. These films can be expected to be applied to sensing materials.

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