최근 Advanced Materials에 발표된 본 연구실의 수용액 재분산이 가능한 기능성 탄소나노튜브 제조기법에
대한 연구논문이 미국 화학학회(American Chemical Society)의 Research Highlight로 선정되어 'Heart-Cut'
5월 7일자에 소개되었습니다.

Tae-Hwan Kim, Changwoo Doe, Steven R. Kline and Sung-Min Choi
"Water-Redispersible Isolated Single-Walled Carbon Nanotubes Fabricated by In Situ Polymerization of Micelles"
Adv. Mater. 2007, 19, 929~933

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http://portal.acs.org/portal/acs/corg/content?_nfpb=true&_pageLabel=PP_ARTICLEMAIN&node_id=840&content_id=WPCP_007209&use_sec=true&sec_url_var=region1#P15_1658

[내용 전문]

Permanently isolate carbon nanotubes by encasing them in polymerized surfactant “sheaths”.

Various noncovalent processes have been developed for dispersing single-walled carbon nanotubes (SWNTs) in liquids, especially aqueous media, in efforts to enhance their processibility. The SWNT dispersions are, however, often susceptible to changes in the external conditions during macroscopic processing. For example, once surfactant-aided dispersions of SWNTs are freeze-dried, they cannot be redispersed in water.

S.-M. Choi and coauthors at the Korea Advanced Institute of Science and Technology (Daejeon) and the NIST Center for Neutron Research (Gaithersburg, MD) have developed a new process for noncovalently functionalizing SWNTs. The process has two steps: dispersing SWNTs in water by using the surfactant cetyltrimethylammonium 4-vinylbenzoate (CTVB), and fixing the surfactant monolayer on the SWNTs by the in situ polymerization of the counterions by the radical initiator 2,2′-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride (VA-044) to furnish polymer-wrapped SWNTs (p-SWNTs).

The p-SWNT dispersion in water is stable for months. After freeze-drying, the p-SWNTs are readily redispersible in water without the formation of visible aggregates, whereas the CTVB-aided dispersion of SWNTs without polymerization (u-SWNTs) cannot be cleanly redispersed in water without aggregate formation (see photo above). This advantage allows further processing of the p-SWNTs for various practical applications. (Adv. Mater. 2007, 19, 929–933; Ben Zhong Tang) Go to top