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Functionalization of Carbon Nanotubes via Electrophilic Substitution Reaction in Polyphosphoric Acid

등록일
2005년 8월 3일 17시 49분 33초
접수번호
0063
발표코드
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발표시간
금 10시 : 30분
발표형식
심포지엄
발표분야
고분자화학 - 고분자 나노 정보 소재 (Polmeric Nanomaterials for Information Technology)
저자 및
공동저자
이화정, 오세진, 최자영, L.-S. Tan1, 백종범
충북대학교,
1미) 공군연구소,
Various 4-substituted benzoic acids were introduced onto the surface of MWNTs. Depending upon the electron-donating or electron-withdrawing nature of substituents to the 4-position of carboxylic acid, the amount of substituents onto MWNTs varied from 4-40 wt%. The stronger electron-donating nature, the compound displayed the better reactivity. Some of them were used as an additive to polymer nanocomposites. For example, as-received MWNT, 4-ethoxybenzoic acid (EBA) and 4-methoxybenzoic acid (MBA) functionalized MWNTs were dispersed in ethylene glycol (EG). Because of the structural similarity, the mixture of EBA-MWNT (0.4 wt%) and EG displayed the best dispersion. In-Situ polycondensation of EG and terephthalic acid (TPA) in the presence of pristine MWNT, MBA-MWNT, or EBA-MWNT were carried out and compared the images from SEM taken at the same magnification for these nanocomposites, it is clear that EBA-MWNT in PET matrix is most homogeneously dispersed and the interfacial boundary between EBA-MWNT and PET matrix is practically non-discernable.

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