Multifunctional Biobased Polyurethane/Tannic Acid Composites with Controllable Damping, Flame-Retardant, and Ultraviolet-Shielding Performances
Dexian Yin, Xin Wang, Yimin Wang, Tao Shou, Xiuying Zhao, Li Liu, Shikai Hu, Liqun Zhang
Abstract
Elastomers with distinctive viscoelastic behavior are widely utilized in vibration and noise reduction. However, most elastomers are derived from petroleum-based sources and their functionality are limited to a single purpose. In this work, a biobased polyurethane (bio-PU) elastomer was synthesized from biobased poly(trimethylene ether) glycol, and then a H-bond cross-linking strategy was implemented by incorporating biobased tannic acid (bio-TA) to fabricate biobased PU/TA (bio-PU/TA) damping composites. The structures and performances of the fabricated composites were systematically characterized. The results illustrated that the strong H-bond interactions between bio-PU and bio-TA molecular chains greatly enhanced the mechanical and damping performances of the composites, in which the tensile strength, elongation at break, and tan δ max of bio-PU/TA composites were enhanced by 173.5, 68.7, and 55.4%, respectively. Moreover, the introduction of bio-TA with abundant polyphenol structures remarkably improves the capacity for residual carbon formation and the ultraviolet (UV)-shielding of bio-PU, leading to an upgraded bio-PU/TA composite flame retardancy and enhanced UV-shielding properties in the 280–400 nm UV region. The fabricated bio-PU/TA composites offer a promising strategy for developing damping materials with multifunctional performances.