Effect of Melt Processing on Multi-Walled Carbon Nanotube Length

2019 ◽  
pp. 157-169
Author(s):  
Brian Grady
Keyword(s):  
Carbon Nanotube ◽  
Melt Processing ◽  
Multi Walled Carbon Nanotube

Improved mechanical properties of aligned multi-walled carbon nanotube/thermoplastic polyimide composites by hot stretching

2018 ◽  
Vol 53 (9) ◽  
pp. 1241-1253 ◽  
Author(s):  
Tran H Nam ◽  
Ken Goto ◽  
Toshiki Kamei ◽  
Yoshinobu Shimamura ◽  
Yoku Inoue ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Volume Fraction ◽  
High Heat ◽  
Melt Processing ◽  
Multi Walled Carbon Nanotube ◽  
Vertically Aligned ◽  
Polyimide Composites ◽  
Polyimide Matrix ◽  
Surface Morphologies

High heat resistance composites based on thermoplastic polyimide resin and aligned multi-walled carbon nanotube sheets have been developed using hot-melt processing method with a vacuum-assisted system. The horizontally aligned carbon nanotube sheets were produced from vertically aligned carbon nanotube arrays using drawing and press-winding techniques. Effects of processing conditions, carbon nanotube contents, and hot stretching on the mechanical properties of the composites were examined. The aligned carbon nanotube/thermoplastic polyimide composites were fabricated successfully at a temperature of 410℃ under 2 MPa pressure. The surface morphologies of the composites showed high alignment and dense packing of carbon nanotubes, and a good impregnation of the thermoplastic polyimide matrix into the aligned carbon nanotube sheets. The best mechanical properties of the aligned carbon nanotube/thermoplastic polyimide composites were achieved at the carbon nanotube volume fraction of about 50% in this study. Hot stretching of the aligned carbon nanotube/thermoplastic polyimide composites at the temperatures above the glass transition temperature and below the melting temperature improved the mechanical properties of the composites considerably.

scholarly journals Photoluminescent Properties of Hydroxyapatite and Hydroxyapatite/Multi-Walled Carbon Nanotube Composites

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 832
Author(s):  
Edna X. Figueroa-Rosales ◽  
Javier Martínez-Juárez ◽  
Esmeralda García-Díaz ◽  
Daniel Hernández-Cruz ◽  
Sergio A. Sabinas-Hernández ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Hexagonal Phase ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Multi Walled Carbon Nanotube ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites ◽  
Co Precipitation ◽  
Functionalized Mwcnts

Hydroxyapatite (HAp) and hydroxyapatite/multi-walled carbon nanotube (MWCNT) composites were obtained by the co-precipitation method, followed by ultrasound-assisted and microwave radiation and thermal treatment at 250 °C. X-ray diffraction (XRD) confirmed the presence of a hexagonal phase in all the samples, while Fourier-transform infrared (FTIR) spectroscopy elucidated the interaction between HAp and MWCNTs. The photoluminescent technique revealed that HAp and the composite with non-functionalized MWCNTs present a blue luminescence, while the composite with functionalized MWCNTs, under UV-vis radiation shows an intense white emission. These findings allowed presentation of a proposal for the use of HAp and HAp with functionalized MWCNTs as potential materials for optoelectronic and medical applications.

Adsorption performance of multi-walled carbon nanotube-SiO2 adsorbent for toluene

2021 ◽  
Vol 49 (6) ◽  
pp. 861-872
Author(s):  
Wei LIU ◽  
Zhuang LI ◽  
Shao-peng ZHANG ◽  
Wei-wei JIAN ◽  
Dan-zhu MA
Keyword(s):  
Carbon Nanotube ◽  
Adsorption Performance ◽  
Multi Walled Carbon Nanotube
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