Aspect Ratio and Loading Effects of Multiwall Carbon Nanotubes in Epoxy for Electrically Conductive Adhesives

2008 ◽  
pp. 279-292
Keyword(s):  
Carbon Nanotubes ◽  
Aspect Ratio ◽  
Multiwall Carbon Nanotubes ◽  
Conductive Adhesives ◽  
Electrically Conductive ◽  
Electrically Conductive Adhesives ◽  
Loading Effects ◽  
Multiwall Carbon

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.

scholarly journals Electrically Conductive Electrospun Polymeric Mats for Sensing Dispersed Vegetable Oil Impurities in Wastewater

Processes ◽  
2019 ◽  
Vol 7 (12) ◽  
pp. 906 ◽  
Author(s):  
Abdolali Moghaddasi ◽  
Patrik Sobolčiak ◽  
Anton Popelka ◽  
Kishor Kumar Sadasivuni ◽  
Zdeno Spitalsky ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Resistivity ◽  
Vegetable Oil ◽  
Multiwall Carbon Nanotubes ◽  
Dimethyl Formamide ◽  
Gold Electrodes ◽  
Active Sensing ◽  
Electrically Conductive ◽  
Styrene Copolymer ◽  
Multiwall Carbon

This paper addresses the preparation of electrically conductive electrospun mats on a base of styrene-isoprene-styrene copolymer (SIS) and multiwall carbon nanotubes (CNTs) and their application as active sensing elements for the detection of vegetable oil impurities dispersed within water. The most uniform mats without beads were prepared using tetrahydrofuran (THF)/dimethyl formamide (DMF) 80:20 (v/v) as the solvent and 13 wt.% of SIS. The CNT content was 10 wt.%, which had the most pronounced changes in electrical resistivity upon sorption of the oil component. The sensors were prepared by deposition of the SIS/CNT layer onto gold electrodes through electrospinning and applied for sensing of oil dispersed in water for 50, 100, and 1000 ppm.

scholarly journals Catalytic Synthesis of Substrate-Free, Aligned and Tailored High Aspect Ratio Multiwall Carbon Nanotubes in an Ultrasonic Atomization Head CVD Reactor

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Fahad Ali Rabbani ◽  
Zuhair Omar Malaibari ◽  
Muataz Ali Atieh ◽  
Ammar Jamie
Keyword(s):  
Carbon Nanotubes ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Multiwall Carbon Nanotubes ◽  
Chemical Vapor ◽  
Feed Solution ◽  
Ultrasonic Atomization ◽  
Pilot Plant Scale ◽  
Carrier Gases ◽  
Multiwall Carbon

Chemical vapor deposition (CVD) method has proven its benchmark, over other methods, for the production of different types of carbon nanotubes (CNT) on commercial and lab scale. In this study, an injection vertical CVD reactor fitted with an ultrasonic atomization head was used in a pilot-plant scale (height 274 cm, radius 25 cm) for semicontinuous production of multiwall carbon nanotubes (MWCNTs). p-Xylene was used as a hydrocarbon precursor in which ferrocene was dissolved and provided the cracking catalyst. Atomization of the feed solution resulted in full and even dispersion of the catalytic solution. This dispersion led to the production of high aspect ratio MWCNTs (ranging from 8,000 to 12,000) at 850°C. Different experimental parameters affecting the quality and quantity of the produced CNTs were investigated. These included temperature, reaction time, and flow rate of the reaction and carrier gases. Different properties of the produced CNTs were characterized using SEM and TEM, while TGA was used to evaluate their purity. Specific surface area of selected samples was calculated by BET.

Effect of aspect ratio of multiwall carbon nanotubes on resistance-pressure sensitivity of rubber nanocomposites

2007 ◽  
Vol 91 (7) ◽  
pp. 072907 ◽  
Author(s):  
Mei-Juan Jiang ◽  
Zhi-Min Dang ◽  
Hai-Ping Xu ◽  
Sheng-Hong Yao ◽  
Jinbo Bai
Keyword(s):  
Carbon Nanotubes ◽  
Aspect Ratio ◽  
Multiwall Carbon Nanotubes ◽  
Pressure Sensitivity ◽  
Rubber Nanocomposites ◽  
Multiwall Carbon
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