국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Functionalizing CNTs for Making Epoxy/CNT Composites
저자	Chen, Jian;; Rajagopal, Ramasubramaniam
Keyword	CARBON NANOTUBES;; ELECTRICAL RESISTIVITY;; EPOXY MATRIX COMPOSITES;; EPOXY RESINS;; MATRIX MATERIALS;; POLYCARBONATES;; MOLECULAR CHAINS;; SOLVENTS;; DAMAGE;; HARDENERS;;
URL	http://hdl.handle.net/2060/20090032107
보고서번호	MSC-23719-1
발행년도	2009
출처	NTRS (NASA Technical Report Server)
ABSTRACT	Functionalization of carbon nanotubes (CNTs) with linear molecular side chains of polyphenylene ether (PPE) has been shown to be effective in solubilizing the CNTs in the solvent components of solutions that are cast to make epoxy/CNT composite films. (In the absence of solubilization, the CNTs tend to clump together instead of becoming dispersed in solution as needed to impart, to the films, the desired CNT properties of electrical conductivity and mechanical strength.) Because the PPE functionalizes the CNTs in a noncovalent manner, the functionalization does not damage the CNTs. The functionalization can also be exploited to improve the interactions between CNTs and epoxy matrices to enhance the properties of the resulting composite films. In addition to the CNTs, solvent, epoxy resin, epoxy hardener, and PPE, a properly formulated solution also includes a small amount of polycarbonate, which serves to fill voids that, if allowed to remain, would degrade the performance of the film. To form the film, the solution is drop-cast or spin-cast, then the solvent is allowed to evaporate.