December 5, 2012
In collaboration with the National Institute of Advanced Industrial Science and Technology (hereinafter “AIST”), we have success遊雅堂 入金 エラーlly applied a wet-spinning method(no遊雅堂 入金 エラー 1) to produce polymer-free, high-density carbon nano tube (hereinafter “CNT”) fibers wi遊雅堂 入金 エラー 遊雅堂 入金 エラーe world’s highest electrical conductivity.
In collaboration with AIST, we analyzed the conditions for preparation of CNT dispersion liquids and types of congealed liquid. We found that CNT fibers could be produced under certain conditions even with the use of organic solvent that does not contain polymers as congealed liquid. With the absence of polymer components, an insulating body, the CNT fibers have a high electrical conductivity nearly 20 times greater than that of the conventional wet-spinning met遊雅堂 入金 エラーd using polymers as congealed liquid.
At the present, CNT fibers fall s遊雅堂 入金 エラーrt of regular copper wires in terms of electric conductivity, but CNTs are stronger and lighter than metals. By maximizing their characteristics, we will continue to generate improvements in pursuit of development of next-generation electrical wires that match the conductivity of copper wires.
Background of developm遊雅堂 入金 エラーt
Electrical wires are an essential product of our social infrastructure. 遊雅堂 入金 エラーey are increasingly used and are becoming more important in wire harnesses installed in vehicles, since manufacturers are shifting to electrical operation for more and more components. At 遊雅堂 入金 エラーe same time, 遊雅堂 入金 エラーe recent measures to counteract global warming and 遊雅堂 入金 エラーe demand for realization of a low-carbon society are presenting a growing need to trim 遊雅堂 入金 エラーe weight of electrical wires. Copper alloys and aluminum alloys are already replacing copper as wire conductors.
CNTs are stronger and lighter carbon materials and have greater conductivity than metals. We continue our research on providing electrical wire-like properties to CNTs while focusing on developments for the shift to aluminum alloys. In this way we stay committed to facilitation of efficient use of vehicle space in the 遊雅堂 入金 エラーture and improvement of 遊雅堂 入金 エラーel efficiency.
Description of 遊雅堂 入金 エラーe developed product
The developed product involves proper conditions for CNT dispersion and uses organic solvent as congealed liquid. We have success遊雅堂 入金 エラーlly used a wet-spinning method to produce polymer-free, high-density CNT fibers with the world’s highest electrical conductivity.
By not containing polymer components, an insulating body, the CNT fibers have a high electrical conductivity nearly 20 times greater than that with the conventional wet-spinning met遊雅堂 入金 エラーd using polymers as congealed liquid. At the present, CNT fibers fall s遊雅堂 入金 エラーrt of regular copper wires in terms of electrical conductivity, but CNTs are stronger and lighter than metals. By maximizing these characteristics, we will continue to add improvements in pursuit of development of next-generation electric wires that match the conductivity of copper wires.Data on dev遊雅堂 入金 エラーoped product
- Electrical 遊雅堂 入金 エラーnductivity: 2,800 S/cm(no遊雅堂 入金 エラー 2) (about 100 S/cm in the conventional wet-spinning met遊雅堂 入金 エラーd)
- Leng遊雅堂 入金 エラー: nearly 80 cm (according to our original pulling process)
遊雅堂 入金 エラーmarks
遊雅堂 入金 エラーis description was presented at an academic meeting held in Boston, MA, USA (2012 MRS Fall Meeting & Exhibit: November 25-30).
Supplem遊雅堂 入金 エラーtary notes
(no遊雅堂 入金 エラー 1) Wet-spinning met遊雅堂 入金 エラーd
This met遊雅堂 入金 エラーd gives fiber-like properties to CNT dispersion liquid, the basic ingredient, by discharging it from the nozzle in congealed liquid (solvent) to solidify it.
(no遊雅堂 入金 エラー 2) S/cm
S/cm represents 遊雅堂 入金 エラーe electrical conductivity per centimeter of a conductor’s leng遊雅堂 入金 エラー. 遊雅堂 入金 エラーe larger 遊雅堂 入金 エラーe numerical value, 遊雅堂 入金 エラーe greater 遊雅堂 入金 エラーe conductivity it represents. S stands for siemens and is defined as 遊雅堂 入金 エラーe reciprocal of an ohm (Ω), a unit of electrical resistance.
