Navegando por Palavras-chave "graphite nanosheets"

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    Influence of photodegradation with UV radiation in biotreatment with Paecilomyces variotti on PHBV/GNS nanocomposites
    (Inst Engineering Technology-Iet, 2018) Montagna, Larissa Stieven [UNIFESP]; Montanheiro, Thais Larissa do Amaral [UNIFESP]; Borges, Aline Chiodi; Koga-Ito, Cristiane Yumi; Lemes, Ana Paula [UNIFESP]; Rezende, Mirabel Cerqueira [UNIFESP]
    Graphite nanosheets (GNSs) and poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) nanocomposites were prepared by solution casting method. This study aimed to evaluate the effects of previously phototreatment with ultraviolet (UV) radiation on the biotreatment with Paecilomyces variotti of neat PHBV and PHBV/GNS nanocomposites. Some samples of PHBV film were submitted only to biotreatment with P. variotti during 120 days
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    Multifunctional green nanostructured composites: preparation and characterization
    (Iop Publishing Ltd, 2018) Montagna, Larissa Stieven [UNIFESP]; Oishi, Silvia Sizuka; Diniz, Milton Faria; Montanheiro, Thais Larissa do Amaral [UNIFESP]; Silva, Fabio Santos; Passador, Fabio Roberto [UNIFESP]; Rezende, Mirabel Cerqueira [UNIFESP]
    The present research had as main purpose to develop and characterize multifunctional green nanocomposites based on poly(furfuryl alcohol) resin (PFA bioresin), derived from sugarcane bagasse reinforced with different contents of graphite nanosheets (GNS) (0.5, 1.0, 1.5 and 2.0 wt%) which were dispersed in PFA bioresin using an ultrasonic processor. The mixture was poured into silicone molds and cured at room temperature during 24 h followed by a post-cure at preheated oven in cycles of different temperatures. TEM analysis of GNS showed this filler consist of ultrathin and layered sheets. SEM micrographs of the cryogenic fracture of the nanocomposite presented the good interfacial adhesion between PFA bioresin and GNS. Moreover, upon GNS addition in the PFA bioresin, PFA/GNS nanocomposites demonstrated superior mechanical performance and better electrical conductivity than neat PFA bioresin.