Dispersion of carbon nanotube into water by the use of novel dendritic fluorinated block copolymer

COLL 252

Nao Naitoh, hideosaw@cc.hirosaki-u.ac.jp1, Remi Kasai1, Masaru Suzuki, hideosaw@cc.hirosaki-u.ac.jp1, Keiichi Ohnishi2, and Hideo Sawada, hideosaw@cc.hirosaki-u.ac.jp1. (1) Department of Frontier Materials Chemistry, Hirosaki University, Hirosaki-City, 036-8561, Japan, (2) Asahi Glass Co., Ltd, Tokyo, 100-8405, Japan
Fluoroalkanoyl peroxide reacted with 1,3,5,7-tetravinyl-1,3,5,7-tetramethylcyclotetrasiloxane to afford fluoroalkyl end-capped oligomers containing some unreacted vinyl segments under very mild conditions. Fluoroalkyl end-capped cyclosiloxane oligomers containing some vinyl groups thus obtained reacted with N,N-dimethylacrylamide and fluoroalkanoyl peroxide to afford new fluorinated dendritic-type block copolymers in good isolated yield. These fluorinated dendritic-type block copolymers have an excellent solubility in not only water but also in traditional organic solvents including aliphatic fluorinated solvents. Interestingly, these fluorinated dendritic-type block copolymers were found to form nanometer size-controlled self-assembled molecular aggregates in aqueous solutions. More interestingly, these fluorinated block copolymers were able to disperse single-walled carbon nanotube (SW-CNT) into water, quite effectively, compared to that of the corresponding fluoroalkyl end-capped oligomers.
 

Fundamental Research in Colloid and Surface Chemistry
6:00 PM-8:00 PM, Monday, August 20, 2007 BCEC -- East Registration, Poster

Division of Colloid & Surface Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007