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http://dx.doi.org/10.7234/kscm.2011.24.1.045

Interfacial Control of Multi-functional CNT and ITO/PET Nanocomposites having Self-Sensing and Transparency  

Wang, Zuo-Jia (경상대학교 나노.신소재공학부, 공학연구원)
Kwon, Dong-Jun (경상대학교 나노.신소재공학부, 공학연구원)
Gu, Ga-Young (경상대학교 나노.신소재공학부, 공학연구원)
Park, Joung-Man (경상대학교 나노.신소재공학부, 공학연구원)
Publication Information
Composites Research / v.24, no.1, 2011 , pp. 45-50 More about this Journal
Abstract
Transparent and conductive carbon nanotube on polyethylene terephthalate (PET) were prepared by dip-coating method for self-sensing multi-functional nanocomposites. The changes in the electrical and optical properties of CNT coating mainly depended on the number of dip-coating, concentration of CNT solution. Consequently, the surface resistance and transmittance of CNT coating were sensitively controlled by the processing parameters. Surface resistance of CNT coating was measured using four-point method, and surface resistance of coated CNT could be better calculated by using the dual configuration method. Optical transmittance of PET film with CNT coating was evaluated using UV spectrum. Surface properties of coated CNT investigated by wettability test via static and dynamic contact angle measurement were consistent with each other. As dip-coating number increased, surface resistance of coated CNT decreased seriously, whereas the transmittance exhibited little lower due to the thicker CNT networks layer. Interfacial microfailure properties were investigated for CNT and indium tin oxide (ITO) coatings on PET substrates by electrical resistance measurement under cyclic loading fatigue test. CNT with high aspect ratio exhibited no change in surface resistance up to 2000 cyclic loading, whereas ITO with brittle nature showed a linear increase of surface resistance up to 1000 cyclic loading and then exhibited the level-off due to reduced electrical contact points based on occurrence of many micro-cracks.
Keywords
CNT coating; surface resistance; four-point method; transmittance; wettability; hydrophobicity;
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Times Cited By KSCI : 1  (Citation Analysis)
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