TY - JOUR
T1 - Structure and mechanical properties of graphene oxide-reinforced polycarbonate
AU - Morales-Zamudio, Luisiana
AU - Lozano, Tomas
AU - Caballero-Briones, Felipe
AU - Zamudio, Minerva A.M.
AU - Angeles-San Martin, Marisela Estefanía
AU - de Lira-Gomez, Patricia
AU - Martinez-Colunga, Guillermo
AU - Rodriguez-Gonzalez, Francisco
AU - Neira, Guadalupe
AU - Sanchez-Valdes, Saúl
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/3/1
Y1 - 2021/3/1
N2 - Polycarbonate (PC) was reinforced with pristine and chemically modified graphene oxide (GO) to assess its effect on the PC mechanical properties. Commercial graphene with oxygen contents of 4.7 at %, was used as reference to corroborate the affinity of a GO with oxygen content of 25.6 at. % with PC. GO was modified with 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide (EDAC). Commercial graphene, unmodified and modified GO were characterized by FTIR, Raman, XRD and XPS to determine the effects of their structure on the mechanical properties of the reinforced PC. The concentration of graphene oxides in the PC nanocomposites was 0.25, 0.50 and 0.75 wt %. The nanocomposites were characterized by tensile and impact resistance tests as well as by TGA. The distribution of graphene oxides within the PC matrix was evaluated by optical microscopy and scanning electron microscopy. Samples with unmodified GO and commercial graphene showed better dispersion into the polymer matrix than EDAC-modified GO. The unmodified GO increased show increased impact resistance with respect to PC as well as a 291% increment in the elongation at break, with an optimal content of 0.25 wt % of the filler. The EDAC-modified graphene oxide as well as commercial graphene did not increase the impact resistance at any used concentration. The structural and chemical analysis of the EDAC-GO indicate GO reduction during its modification, suggesting that the oxygen functional groups in pristine GO, particularly carboxyl moieties are the responsible for the dispersion and interactions with the polymer and the improvement in mechanical properties.
AB - Polycarbonate (PC) was reinforced with pristine and chemically modified graphene oxide (GO) to assess its effect on the PC mechanical properties. Commercial graphene with oxygen contents of 4.7 at %, was used as reference to corroborate the affinity of a GO with oxygen content of 25.6 at. % with PC. GO was modified with 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide (EDAC). Commercial graphene, unmodified and modified GO were characterized by FTIR, Raman, XRD and XPS to determine the effects of their structure on the mechanical properties of the reinforced PC. The concentration of graphene oxides in the PC nanocomposites was 0.25, 0.50 and 0.75 wt %. The nanocomposites were characterized by tensile and impact resistance tests as well as by TGA. The distribution of graphene oxides within the PC matrix was evaluated by optical microscopy and scanning electron microscopy. Samples with unmodified GO and commercial graphene showed better dispersion into the polymer matrix than EDAC-modified GO. The unmodified GO increased show increased impact resistance with respect to PC as well as a 291% increment in the elongation at break, with an optimal content of 0.25 wt % of the filler. The EDAC-modified graphene oxide as well as commercial graphene did not increase the impact resistance at any used concentration. The structural and chemical analysis of the EDAC-GO indicate GO reduction during its modification, suggesting that the oxygen functional groups in pristine GO, particularly carboxyl moieties are the responsible for the dispersion and interactions with the polymer and the improvement in mechanical properties.
KW - Elongation at break
KW - Graphene oxide
KW - Intermolecular interactions
KW - Mechanical properties
KW - Polycarbonate
UR - http://www.scopus.com/inward/record.url?scp=85098734785&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2020.124180
DO - 10.1016/j.matchemphys.2020.124180
M3 - Artículo
AN - SCOPUS:85098734785
SN - 0254-0584
VL - 261
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 124180
ER -