2024 | Yijiao Xue, Meng Zhang, Siqi Huo, Zhewen Ma, Mark Lynch, Bryan T Tuten, Ziqi Sun, Wei Zheng, Yonghong Zhou, Pingan Song
This study presents the development of a novel, sustainable polyurethane (PU) adhesive with integrated performance features, including mechanical robustness, high adhesion strength, fire retardancy, switchable adhesion, and biodegradability. The adhesive is designed using a phosphorus-containing pimaric acid bio-derivative (AD) as functional segments, which are rationally engineered to enhance the adhesive's properties. The resulting PU adhesive exhibits an ultrahigh adhesion force of 38.8 N cm−1 on PVC substrates and can be reused through ethanol dissolution. It also demonstrates temperature-responsive switchable adhesion and intrinsic fire retardance due to its biphasic modes of action. The adhesive is completely biodegradable in the presence of lipase or dilute acid, and it shows superior heat dissipation capabilities compared to commercial heat sinks when used as a thermal dissipator film. This work offers a novel design approach for creating next-generation sustainable high-performance adhesives with functional integration and circular life cycles, which are expected to find extensive real-world applications in various industries.This study presents the development of a novel, sustainable polyurethane (PU) adhesive with integrated performance features, including mechanical robustness, high adhesion strength, fire retardancy, switchable adhesion, and biodegradability. The adhesive is designed using a phosphorus-containing pimaric acid bio-derivative (AD) as functional segments, which are rationally engineered to enhance the adhesive's properties. The resulting PU adhesive exhibits an ultrahigh adhesion force of 38.8 N cm−1 on PVC substrates and can be reused through ethanol dissolution. It also demonstrates temperature-responsive switchable adhesion and intrinsic fire retardance due to its biphasic modes of action. The adhesive is completely biodegradable in the presence of lipase or dilute acid, and it shows superior heat dissipation capabilities compared to commercial heat sinks when used as a thermal dissipator film. This work offers a novel design approach for creating next-generation sustainable high-performance adhesives with functional integration and circular life cycles, which are expected to find extensive real-world applications in various industries.