2016
DOI: 10.21577/0103-5053.20160274
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Tailored Degree of Functionalization and Length Preservation of Multiwalled Carbon Nanotubes by an Optimized Acid Treatment Process

Abstract: The introduction of oxygen groups in carbon nanotubes is considered crucial for many applications. However, there is a lack of controlled functionalization methods which ensure nanotubes with specific property values according to each interest. In this work, acid treatments of multiwalled carbon nanotubes (MWCNTs) employing an optimized ultrasound process with moderate heating and stirring were studied by means of a factorial design. The functionalized nanotubes were characterized by thermogravimetry, elementa… Show more

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Cited by 7 publications
(9 citation statements)
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“…The slight weight loss of PP/20% n-HA/0.3% f-MWCNTs and PP/20% n-HA/0.2% f-MWCNTs with rising temperature from 100 to 130 °C noted. It was caused due to the water evaporation from these specimens 34 . The TGA curves of the second weight loss of the specimen were observed from 400 to 495 °C.…”
Section: Resultsmentioning
confidence: 97%
“…The slight weight loss of PP/20% n-HA/0.3% f-MWCNTs and PP/20% n-HA/0.2% f-MWCNTs with rising temperature from 100 to 130 °C noted. It was caused due to the water evaporation from these specimens 34 . The TGA curves of the second weight loss of the specimen were observed from 400 to 495 °C.…”
Section: Resultsmentioning
confidence: 97%
“…A Figura 12 indica com detalhes um possível modelo da estrutura de nanotubo de carbono funcionalizado. A inserção de grupos carboxílicos aos NTC deverá ocorrer preferencialmente nas extremidades, pois é a região de maior imperfeição da rede hexagonal (A) (CASTRO et al, 2017;VIEIRA et al, 2007).…”
Section: )unclassified
“…Procedimentos oxidativos, como, por exemplo, o emprego da solução sulfonitrílica, levam a distorções mais graves da rede hexagonal em decorrência da remoção de carbono na forma de monóxido de carbono (CO) e dióxido de carbono (CO2). Assim, grupos químicos, que apresentam o átomo de oxigênio, como o grupo carboxílico, podem ser incorporados aos NTC pelas vacâncias formadas (B) (CASTRO et al, 2017;VIEIRA et al, 2007).…”
Section: )unclassified
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