posted on 2024-01-23, 16:04authored byShanling Lu, Yuehan Qian, Yuemin Zhou, He Liu, Xu Xu, Fuhao Dong
Rosin, with a rigid hydrogenated phenanthrene ring, is
a widely
available biomass, but its high-value utilization needs to be enhanced.
Inspired by sustainable development strategies, the design of polymer
elastomers with a room-temperature self-healing capability has been
a hot focus topic. However, designing elastomers that combine the
conflicting properties of high mechanical performance and room-temperature
self-healing is a significant challenge. The hydrogenated phenanthrene
ring of rosin provides a superior solution to this problem. In this
work, the polyurethane elastomer (BPU-X% AP) based
on rosin-hydrogenated phenanthrene ring structure, dynamic oxime,
and hydrogen bonding was reported. The BPU-X% AP
exhibits high tensile strength (37.8 MPa), and good toughness (126.9
MJ m–3). Due to the rosin structure that promotes
the movement of the elastomer chain segments, the elastomers have
fast room-temperature self-healing and recyclability. Benefiting from
their excellent mechanical strength and self-healing properties, BPU-X% AP as adhesives exhibits a strong lap shear strength
of 5.5 MPa, and they can be used as hot melt binders. Corresponding
to the cycling of the elastomer, the adhesive strength of BPU-10%
AP remains almost the same after three cycles of adhesion to the iron
and aluminum plates. This work provides a viable approach for the
preparation of high-performance biomodified polyurethanes.