Self-healing ability and adhesion strength of capsule embedded coatings-Micro and nano sized capsules containing linseed oil

► Linseed oil was encapsulated with a polyureaformaldehyde (PUF) shell. ► Self-healing ability was created in an epoxy coating by capsule embedment. ► The self-healing ability was a function of capsule concentration in the coating. ► The capsule incorporation caused adhesion strength reduction. ► The nano scale capsules showed higher self-healing performance compared with micro.