Catalyst-free self-healing fully bio-based vitrimers derived from tung oil: Strong mechanical properties, shape memory, and recyclability

•TOTGE with terminal epoxy groups was prepared using tung oil.•Catalyst-free self-healing vitrimers were prepared using TOTGE and citric acid.•The vitrimers exhibited high properties due to the introduction of terminal epoxy groups.•Vitrimers can complete network rearrangement with autocatalysis of −OH groups.•The vitrimers exhibited self-healing, shape memory and reprocessing.