Offer no. 8/10
Method for modification of carbon nanotubes, especially polyhedral
The invention presents a method of modification of carbon nanotubes, particularly multiwalled nanotubes. The essence of this method involves the preliminary oxidation of the nanotubes through the incadescing solid nanotubes in the air inside a vessel of adjustable volume and maintaining temperature in the range of 500-700 ° C. Heating is pereformed for 2 to 15 min inside a microwave owen of frequency from 50 MHz to 200 GHz and a power of 100 W to 2000 W. Then the incandescent carbon nanotubes are additionally oxidized by introducing them into either a cooling or cooling-oxidizing liquid medium followed by placing the suspension for about 10 minutes in an ultrasonic bath. The thoroughly disperssed suspension of the oxidized carbon nanotubes is filtered or centrifuged, washed then dried until the fine powder of the final product results.
Leszek Stobiński, Piotr Tomasik, Karen Khachatryan, Gohar Khachatryan, Oskar Michalski
- Advantages / Innovative aspects:
- purified hydrophilic carbon nanotubes, modified by oxygen groups (-COOH, >CO, -OH),
- a high degree of carbon nanotubes dispersion in aqueous medium
carbon nanotubes, purification, modification, oxidation, microwave field, ultrasonic bath, dispersion
Modified carbon naotubes can be suitable as materials for micro and nanoelectronics, nanodevices, markers, sensors and a variety of composite materials.
- State of the progress:
stage of readiness to introduction
- Intellectual property rights:
Patent in Poland, Co-owner Warsaw University of Technology