@Article{MontanheiroCrMaTaDuLe:2015:EfMWFu,
               author = "Montanheiro, T. L. do Amaral and Crist{\'o}van, F. H. and 
                         Machado, Jo{\~a}o Paulo Barros and Tada, D. B. and Dur{\'a}n, N. 
                         and Lemes, A. P.",
          affiliation = "{Universidade Federal de S{\~a}o Paulo (UNIFESP)} and 
                         {Universidade Federal de S{\~a}o Paulo (UNIFESP)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidade Federal 
                         de S{\~a}o Paulo (UNIFESP)} and {Universidade Federal de S{\~a}o 
                         Paulo (UNIFESP)} and {Universidade Estadual de Campinas 
                         (UNICAMP)}",
                title = "Effect of MWCNT functionalization on thermal and electrical 
                         properties of PHBV/MWCNT nanocomposites",
              journal = "Journal of Materials Research",
                 year = "2015",
               volume = "30",
               number = "1",
                month = "Jan.",
             keywords = "Differential scanning calorimetry, Dispersions, Fillers, 
                         Nanocomposites, Scanning electron microscopy, Surface roughness, 
                         Thermodynamic stability, Thermogravimetric analysis, Yarn, 
                         Electrical conductivity, Functionalized MWCNTs, Infrared and Raman 
                         spectroscopy, Oxidation reactions, Poly (phbv)(HYDROXYBUTYRATE CO 
                         -HYDROXYVALERATE), Thermal and electrical properties, 
                         Thermogravimetry analysis, Zeta potential measurements, 
                         Multiwalled carbon nanotubes (MWCN).",
             abstract = "Pristine multiwalled carbon nanotubes (P-MWCNTs) were 
                         functionalized with carboxylic groups (MWCNT-COOH) through 
                         oxidation reactions and then reduced to produce hydroxyl groups 
                         (MWCNT-OH). Pristine and functionalized MWCNTs were used to 
                         produce poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) 
                         nanocomposites with 0.5 wt% of MWCNTs. MWCNT functionalization was 
                         verified by visual stability in water, infrared and Raman 
                         spectroscopy, and zeta potential measurements. Pristine and 
                         functionalized MWCNTs acted as the nucleating agent in a PHBV 
                         matrix, as verified by differential scanning calorimetry (DSC). 
                         However, the dispersion of filler into the matrix, thermal 
                         stability, and direct current (DC) conductivity were affected by 
                         MWCNT functionalization. Scanning electron microscopy (SEM) showed 
                         that filler dispersion into the PHBV matrix was improved with 
                         MWCNT functionalization. The surface roughness was reduced with 
                         the addition and functionalization of MWCNT. The thermal stability 
                         of PHBV/MWCNT-COOH, PHBV/P-MWCNT, and PHBV/MWCNT-OH nanocomposites 
                         were 20, 30, and 30 °C higher than neat PHBV, respectively, as 
                         verified by thermogravimetry analysis (TGA). Addition of pristine 
                         and functionalized MWCNTs provided electrical conductivity in 
                         nanocomposite, which was higher for PHBV/P-MWCNTs (1.2 x 10-5 S 
                         cm-1).",
                  doi = "10.1557/jmr.2014.303",
                  url = "http://dx.doi.org/10.1557/jmr.2014.303",
                 issn = "0884-2914",
                label = "scopus 2015-01 DoAmaralMontanheiroaCrMaTaDuLe:2014:EfMWFu",
             language = "en",
        urlaccessdate = "27 abr. 2024"
}