Improving the Dispersion and Integration of Multi-Walled Carbon Nanotubes in PolyvinyI-Alcohol Composite Thin Film through Surface Modification
Improving the Dispersion and Integration of Multi-Walled Carbon Nanotubes in PolyvinyI-Alcohol Composite Thin Film through Surface Modification作者机构：Key Laboratory of Materials Technology Vietnam National University Ho Chi Minh City 70000 Vietnam Faculty of Materials Technology University of Technology Ho Chi Minh City 70000 Vietnam
出 版 物：《Journal of Chemistry and Chemical Engineering》 (化学与化工（英文版）)
年 卷 期：2013年第7卷第1期
页 面：18-25页
学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学]
主 题：MWNT modification composite
摘 要：The article investigated the influence of modification process parameters on dispersity of MWNTs DI （in deionized） water and PVA/MWNT composite＇s electrical conductivity. Experimental results obtained by SEM （scanning electron microscope）, TEM （transmission electron microscope）, transform Fourier infrared spectroscopy, pH meter confirmed the most effective conditions in modifying the MWNT surface at the 1：3 mixture of nitric and sulfuric acid at 60 ℃. The extinction coefficient value of functionalized MWNTs at 500 nm wavelength was determined to be 41.24 cm^2·mg^-1, while their dispersibility in DI water was about 12.85 mg/mL and stable in more than 3 weeks via UV-vis spectroscopy. The other important result is the decrease of volume resistivity from 7.98 × 10^6 MΩ·m ofPVA （polyvinyl alcohol） to 4.15 × 10^4 MΩ·m of PVA/1 wt% modified MWNT thin film.
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