Sulfonated chitosan and phosphorylated chitosan coated polylactide membrane by polydopamine-assisting for the growth and osteogenic differentiation of MC3T3-E1s

In this study, a poly(d,l-lactide) (PDLLA) membrane was prepared by the solution casting method, then the surface of the membrane was modified by polydopamine (PDOPA) as a substrate, followed by adsorption of different chitosan derivative sulfonated chitosan (SCS) or/and phosphorylated chitosan (PCS) to obtain different functionalized membranes, and two kinds of chitosan derivatives characterized by FTIR, elemental analysis and zeta potential....