Bio-based vitrimer-like polyurethane based on dynamic imine bond with high-strength, reprocessability, rapid-degradability and antibacterial ability

编号 020031703

推送时间 20211115

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Bio-based vitrimer-like polyurethane based on dynamic imine bond with high-strength, reprocessability, rapid-degradability and antibacterial ability

来源期刊 Polymer

期 第317期

发表时间 20210918

关键词 Bio-based polyurethane;  Vitrimer-like;  Imine bond;  Rapidly-degradable;  Antibacterial property; 

摘要       Synthesis of vitrimer with dynamic?covalent bond?is a surprising solution to overcome the inherent limitations of traditional?thermosets. A bio-based vitrimer-like?polyurethane?formed by?castor oil,?vanillin, m-xylylenediamine and 4,4′-dicyclohexylmethane?diisocyanate?in the preparation has superior mechanical properties, good?solvent resistance, good thermal stability. Furthermore, the existence of dynamic?imine?bond in the vitrimer-like polyurethane is prone for polyurethane to rapid stress relaxation behavior, remoldability, weldability, antibacterial ability. With the hydrolysis of the imine bond, the material can be rapidly degraded at 60?°C for 1?h. In addition, it's commendable that the material exhibits excellent reprocessability that can be maintained at 86% even after 3 consecutive smash/mold pressing cycles. This work provides a promising method to manufacture bio-based polyurethane thermosets with excellent reprocessability, rapidly-degradable and antibacterial property, which has also promoted the high-value utilization of biomass materials.

服务人员 尚玮姣

服务院士 宋湛谦

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