TY - JOUR
T1 - Biocompatibility of poly(lactic acid) with incorporated graphene-based materials
AU - Pinto, A.M.
AU - Moreira, S.
AU - Gonçalves, I.C.
AU - Gama, F.M.
AU - Mendes, A.M.
AU - Magalhães, F.D.
PY - 2013/4/1
Y1 - 2013/4/1
N2 - The incorporation of graphene-based materials has been shown to improve mechanical properties of poly(lactic acid) (PLA). In this work, PLA films and composite PLA films incorporating two graphene-based materials - graphene oxide (GO) and graphene nanoplatelets (GNP) - were prepared and characterized regarding not only biocompatibility, but also surface topography, chemistry and wettability. The presence of both fillers changed the films surface topography, increasing the roughness, and modified the wettability - the polar component of surface free energy increased 59% with GO and decreased 56% with GNP. Mouse embryo fibroblasts incubated with both fillers exceeded the IC50 in both cases with a concentration of 10μgmL-1. No variations in cell proliferation at the surface of the composite films were observed, except for those containing GO after 24h incubation, which presented higher cell proliferation than pristine PLA films. Platelet adhesion to PLA and PLA/GNP films was lower in the presence of plasma proteins than when no proteins were present. Furthermore, incorporation of GNP into PLA reduced platelet activation in the presence of plasma proteins.The results indicated that low concentrations of GO and GNP may be incorporated safely in PLA to improve aspects relevant for biomedical applications, such as mechanical properties.
AB - The incorporation of graphene-based materials has been shown to improve mechanical properties of poly(lactic acid) (PLA). In this work, PLA films and composite PLA films incorporating two graphene-based materials - graphene oxide (GO) and graphene nanoplatelets (GNP) - were prepared and characterized regarding not only biocompatibility, but also surface topography, chemistry and wettability. The presence of both fillers changed the films surface topography, increasing the roughness, and modified the wettability - the polar component of surface free energy increased 59% with GO and decreased 56% with GNP. Mouse embryo fibroblasts incubated with both fillers exceeded the IC50 in both cases with a concentration of 10μgmL-1. No variations in cell proliferation at the surface of the composite films were observed, except for those containing GO after 24h incubation, which presented higher cell proliferation than pristine PLA films. Platelet adhesion to PLA and PLA/GNP films was lower in the presence of plasma proteins than when no proteins were present. Furthermore, incorporation of GNP into PLA reduced platelet activation in the presence of plasma proteins.The results indicated that low concentrations of GO and GNP may be incorporated safely in PLA to improve aspects relevant for biomedical applications, such as mechanical properties.
KW - Cytotoxicity
KW - Hemocompatibility
KW - Platelets
KW - Topography
KW - Wettability
UR - http://www.scopus.com/inward/record.url?scp=84872444845&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfb.2012.12.006
DO - 10.1016/j.colsurfb.2012.12.006
M3 - Article
C2 - 23333912
AN - SCOPUS:84872444845
SN - 0927-7765
VL - 104
SP - 229
EP - 238
JO - Colloids and Surfaces B: Biointerfaces
JF - Colloids and Surfaces B: Biointerfaces
ER -