The Deeply Understanding of the Self‐Healing Mechanism for Self‐Healing Behavior of Supramolecular Materials Based on Cyclodextrin–Guest Interactions

Cyclodextrin (CD)‐based host–guest interactions are one of the important supramolecular interactions and have been playing significant role in the design of self‐healing materials due to high selectivity and dynamic equilibrium. However, a deeper understanding of the self‐healing mechanism is still rare, although self‐healing materials based on CD–guest interactions have many advantages. This study provides a first step for the fundamental understanding of the influence factors on self‐healing behavior of materials containing CD–guest complexes. It is found that the healing motifs are CD–guest interactions. Sufficient polymer chains mobility, a small amount of water, and high inclusion constant ( K ) of host–guest interactions are also essential to the self‐healing process. The threshold of K value is around 10 2 M −1 .