Related Experiment Video
Updated: May 13, 2026
09:23
Fabrication, Densification, and Replica Molding of 3D Carbon Nanotube Microstructures
Published on: July 2, 2012
Top-down process based on electrospinning, twisting, and heating for producing one-dimensional carbon nanotube
Shinji Imaizumi1, Hidetoshi Matsumoto, Yuichi Konosu
1Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S8-27 Ookayama, Meguro-ku, Tokyo 152-8552, Japan.
ACS Applied Materials & Interfaces
|January 28, 2011
Summary
This study developed multiwalled carbon nanotube (MWNT)/poly(vinyl butyral) (PVB) composite nanofibers. Heat treatment significantly enhanced electrical conductivity to 154 S cm(-1), offering a scalable manufacturing method for CNT assemblies.
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Science
Background:
- Developing advanced composite materials with enhanced properties is crucial for various technological applications.
- Multiwalled carbon nanotubes (MWNTs) offer exceptional electrical and mechanical properties, but their effective integration into polymer matrices remains a challenge.
- Electrospinning is a versatile technique for fabricating nanofibers, but achieving high MWNT alignment and conductivity in the resulting composites requires further optimization.
Purpose of the Study:
- To prepare multiwalled carbon nanotube (MWNT)/poly(vinyl butyral) (PVB) composite nanofibers using a novel fabrication process.
- To investigate the effect of successive twisting and heat treatment on the structural, electrical, mechanical, and thermal properties of the MWNT/PVB composite nanofibers.
- To demonstrate a simple and scalable method for manufacturing highly conductive carbon nanotube (CNT) assemblies.
Main Methods:
- Composite nanofibers were fabricated using electrospinning of MWNT/PVB mixtures.
- The electrospun nanofibers underwent successive twisting to form yarns.
- The twisted nanofiber yarns were subjected to heat treatment at various temperatures to enhance their properties.
Main Results:
- High orientation of MWNTs was achieved within the electrified thin jet during electrospinning.
- Heat treatment significantly improved the electrical conductivity, mechanical strength, and thermal stability of the composite nanofiber yarns.
- The electrical conductivity reached a maximum of 154 S cm(-1) for yarns heated at 400 °C, an order of magnitude higher than other electrospun CNT composites.
- The enhanced properties are attributed to the improved MWNT characteristics and alignment induced by heat treatment.
Conclusions:
- The combined process of electrospinning, twisting, and heat treatment is effective for producing highly conductive MWNT/PVB composite nanofibers.
- This top-down approach offers a promising route for the simple and large-scale manufacture of advanced CNT assemblies.
- The resulting composite nanofibers exhibit superior electrical, mechanical, and thermal properties suitable for various applications.
