A self-healing and recyclable polyurethane-urea Diels–Alder adduct synthesized from carbon dioxide and furfuryl amine. Issue 1 (22nd December 2020)

• Record Type: Journal Article
• Authors: Wu, Peixuan; Cheng, Haiyang; Wang, Xinchao; Shi, Ruhui; Zhang, Chao; Arai, Masahiko; Zhao, Fengyu
• Is Part Of: Green chemistry. Volume 23:Issue 1(2021)
• Page Start: 552
• Page End: 560
• Publication Date: 2020-12-22
• Subjects: Environmental chemistry -- Industrial applications -- Periodicals; Environmental management -- Periodicals; 660
• DOI: 10.1039/d0gc03695a
• Languages: English
• ISSNs: 1463-9262

Abstract

Abstract : A green route to synthesize a self-healing polyurethane-urea Diels–Alder adduct (PUUa-DA) using CO2 and furfuryl amine as renewable feedstocks is reported. Abstract : The fabrication of self-healing and recyclable CO2 -based polymeric materials meets the requirement of sustainable development. By introducing reversible hydrogen bonds and heat-responsive Diels–Alder bonds, a new, environmentally friendly, self-healing and recyclable polyurethane-urea Diels–Alder adduct (PUUa-DA) was successfully synthesized using CO2 and furfuryl amine as renewable feedstocks. PUUa-DA was semi-crystalline and exhibited high thermal stability, 5% weight loss temperature being above 220 °C. Moreover, PUUa-DA with a cross-linked structure showed a tensile stress of 18.5 MPa, a modulus of 151 MPa and an elongation at break of 136%. The dynamic Diels–Alder bonds and hydrogen bonds provide the self-healing response and contribute to 94% recovery of the tensile strength upon heating. Therefore, PUUa-DA will have potential applications as a functional material in a wide range of practical fields. The synthesis of PUUa-DA using CO2 and bio-based furfuryl amine will be of importance in green and sustainable chemistry.