Effects of pectin structure and crosslinking method on the properties of crosslinked pectin nanofibers

•Electrospun nanofibers of three representative pectins were crosslinked.•Three feasible crosslinking methods were established.•Pectin structure affected properties of Ca2+-crosslinked nanofibers remarkably.•ADH crosslinking enhanced mechanical strength and inhibited degradation.•ADH crosslinking and high DM facilitated cell adhesion and proliferation.