High-strength, self-healable, transparent castor-oil-based waterborne polyurethane barrier coatings enabled by a dynamic acylhydrazone co-monomer

Sustainable rigid diols (VSD) is incorporated into castor-oil-based waterborne polyurethanes (CWPUs). This work expands the type of high-performance CWPUs with self-healing capability and broadens their applications as paper-based barrier coatings.