Self-healing castor oil-based polyurethane networks featuring cyclodextrin–adamantane host–guest interactions

Sekiya, Takumi; Shibata, Mitsuhiro

doi:10.1007/s00289-022-04555-x

Cited by 6 publications

(1 citation statement)

References 17 publications

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“…The fracture stress at the maximum proportion of 10% was 40 times that of pure PU, and the self‐healing rate was even increased to 8 min at 80°C. Similarly, Sugane and Sekiya teams 112,113 used β‐CD and 1‐adamantanol as host and guest respectively to assemble supramolecular compounds for improving the comprehensive performance of PU. Both studies revealed that the reduction of soft segment content increased the glass transition temperature, tensile strength and tensile modulus.…”

Section: Bond Repairmentioning

confidence: 99%

Self‐healing polyurethane based on a substance supplement and dynamic chemistry: Repair mechanisms and applications

Cao,

Zhang,

Zhang

et al. 2023

J of Applied Polymer Sci

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This review systematically summarizes the repair mechanisms and applications of self‐healing polyurethane (SHPU) materials aiming at energy conservation and safety under different repair methods. As of now, the repair methods that have emerged can be divided into two categories: substance landfill and bond repair. In terms of the repair mechanisms for both, the former involves the release of healing agents from micro‐carriers (microcapsules, hollow fibers, and microvascular) to fill the damaged area upon external impact. In contrast, bond repair combines physical and chemical changes triggered by light, heat, and other factors. To achieve efficient self‐healing in this mode, both the reorganization of broken chemical bonds and the high mobility of chain segments are crucial. Reversible covalent bonds and supramolecular interactions, as two branches of aforementioned reversible chemical bonds, share the responsibility for maintaining efficient self‐healing despite infinite cycling. Additionally, multiple synergistic crosslinked networks, special nanomaterials, and microphase separation are often used to solve the problem of incompatible healing efficiency and mechanical strength in bond repair. When the perspective is focused on the application, this gradually improved SHPU with strong potential and comprehensive performance has provided raw materials for many fields related to human development, such as road, architecture, healthcare, and electronic.

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Section: Bond Repairmentioning

confidence: 99%