Room temperature self-healing epoxy waterborne polyurethane containing microcapsules with waterborne polyurethane shells and mercaptan cores

Zhang, Mengyun; Cong, Rimin; Luo, Yunjun

doi:10.1039/d2ma00085g

Mater. Adv.

2022

DOI: 10.1039/d2ma00085g

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Room temperature self-healing epoxy waterborne polyurethane containing microcapsules with waterborne polyurethane shells and mercaptan cores

Mengyun Zhang

Rimin Cong

Yunjun Luo

Abstract: Regardless of various strategies for preparing microcapsules to obtain self-healing materials with high efficiencies, it remains a significant challenge to use suitable shell materials to capsulate mercaptan due to its...

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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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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

View full text Add to dashboard Cite

show abstract

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Room temperature self-healing epoxy waterborne polyurethane containing microcapsules with waterborne polyurethane shells and mercaptan cores

Abstract: Regardless of various strategies for preparing microcapsules to obtain self-healing materials with high efficiencies, it remains a significant challenge to use suitable shell materials to capsulate mercaptan due to its...

Cited by 1 publication

References 30 publications

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

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

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