author = "Montagna, Larissa Stieven and Montanheiro, Tha{\'{\i}}s Larissa 
                         do Amaral and Machado, Jo{\~a}o Paulo Barros and Passador, 
                         F{\'a}bio Roberto and Lemes, Ana Paula and Rezende, Mirabel 
          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 Federal de S{\~a}o Paulo 
                title = "Effect of graphite nanosheets on properties of 
              journal = "International Journal of Polymer Science",
                 year = "2017",
               volume = "2017",
             abstract = "The influence of different contents, 0.25, 0.50, and 1.00 wt%, of 
                         graphite nanosheets (GNS) on the properties of 
                         poly(3-hydroxybutyrate- co-3-hydroxyvalerate) (PHBV) 
                         nanocomposites obtained by solution casting method has been 
                         studied. GNS were prepared by three steps: intercalation (chemical 
                         exfoliation), expansion (thermal treatment), and the GNS 
                         obtainment (physical treatment by ultrasonic exfoliation). X-ray 
                         diffraction (XRD), Raman spectroscopy, and field emission 
                         gun-scanning electron microscopy (FE-SEM) showed that the 
                         physical, chemical, and thermal treatments preserved the graphite 
                         sheets structure. XRD and Raman results also showed that GNS were 
                         dispersed in the PHBV matrix. The degree of crystallinity (Xc) of 
                         the nanocomposites did not change when the graphite nanosheets 
                         were added. However, the GNS acted as nucleation agent for 
                         crystallization; that is, in the second heating the samples 
                         containing GNS showed two melting peaks. The addition the GNS did 
                         not change the thermal stability of the PHBV.",
                  doi = "10.1155/2017/9316761",
                  url = "http://dx.doi.org/10.1155/2017/9316761",
                 issn = "1687-9422",
             language = "en",
           targetfile = "montagna_effect.pdf",
        urlaccessdate = "01 dez. 2020"