Multifunctional waterborne polyurethane films: amine-response, thermal-driven self-healing and recyclability
Multifunctional waterborne polyurethane films: amine-response, thermal-driven self-healing and recyclability
复制标题
多功能水性聚氨酯薄膜：胺响应、热驱动自修复和可回收性
DOI：
10.1016/j.apsusc.2021.151526
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发表时间：
2021
影响因子：
6.7
通讯作者：
Peng Ye
中科院分区：
文献类型：
--
作者：
Futao Sai;Haitao Zhang;Jianbo Qu;Jianyong Wang;Xiuzhong Zhu;Yang Bai;Peng Ye
目前，功能化水性聚氨酯的制备和应用已成为聚氨酯领域的研究热点。以不同质量比的双乙酰肟和香豆素二醇为反应性填料，与异佛尔酮二异氰酸酯（IPDI）和聚丙二醇（PPG）反应制备了具有上级胺响应性、自修复性和可回收性的水性聚氨酯薄膜（WPU-x）。进行动态力学分析以确定WPU-x的自修复特性。结果表明，WPU-2膜具有良好的自修复性能，其自修复能力是基于软段的运动性、肟基氨基甲酸酯键的动态反应和氢键的结合，在90 °C下自修复7 h后，力学性能自修复效率可达91.11%。紫外测试和荧光成像结果表明，WPU-2膜对二甲胺（DMA）具有快速的浓度依赖性响应，对其他有机胺也有不同程度的响应。WPU-2膜可方便地应用于虾和鱼的冷链运输，用于实时和可视化地监测海产品的新鲜度。同时，WPU-2薄膜可以通过热压和溶液流延回收。因此，该策略为制备多功能水性聚氨酯提供了一定的思路。
Currently, the preparation and application of functional waterborne polyurethane has become a research hotspot in the field of polyurethane. In the present work, Different weight ratios of diacetyl oxime and coumarin diol were used as the reactive filler with isophorone diisocyanate (IPDI) and Poly propylene glycol (PPG) to prepare superior amine-response, self-healing and recyclable waterborne polyurethane films (WPU-x). Dynamic mechanical analysis was carried out to identify the self-healing properties of WPU-x. It was revealed that the WPU-2 film show an excellent self-healing capability based on the combination of the mobility of the soft segment, dynamic reaction of oxime carbamate bond and hydrogen bonds, and the mechanical properties self-healing efficiency can reach 91.11% after self-healing at 90 °C for 7 h. UV testing and fluorescence imaging results shown that WPU-2 film exhibit a rapid and concentration-dependent response to dimethylamine (DMA), and it also shows varying degrees of response to other organic amines. The WPU-2 film could be readily applied in cold chain transportation of shrimp and fish for real-time and visual monitoring the freshness of seafoods. At the same time, the WPU-2 film could be recycled via hot-pressing and solution casting. Therefore, this strategy provides some insights for preparing multi-functional waterborne polyurethane.