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Degradable and recyclable bio-based thermoset epoxy resins
Green Chemistry ( IF 9.3 ) Pub Date : 2020-05-27 , DOI: 10.1039/d0gc01250e Xianchao Chen 1, 2, 3, 4, 5 , Sufang Chen 6, 7, 8, 9, 10 , Zejun Xu 1, 2, 3, 4, 5 , Junheng Zhang 1, 2, 3, 4, 5 , Menghe Miao 11, 12, 13 , Daohong Zhang 1, 2, 3, 4, 5
Green Chemistry ( IF 9.3 ) Pub Date : 2020-05-27 , DOI: 10.1039/d0gc01250e Xianchao Chen 1, 2, 3, 4, 5 , Sufang Chen 6, 7, 8, 9, 10 , Zejun Xu 1, 2, 3, 4, 5 , Junheng Zhang 1, 2, 3, 4, 5 , Menghe Miao 11, 12, 13 , Daohong Zhang 1, 2, 3, 4, 5
Affiliation
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The design of a degradable high-performing thermoset without using organic solvents is critical for the understanding and sustainable development of homogeneous structures with simultaneous reinforcement and toughening functions. Here, we report a novel degradable and recyclable thermoset hyperbranched epoxy resin (EFTH-n) synthesized from bio-based 2,5-furandicarboxylic acid (FDCA). EFTH-n showed excellent performance on common diglycidyl ether of bisphenol-A (DGEBA) with simultaneous improvements in the impact strength, tensile strength, flexural strength, storage modulus and elongation by up to 181.84%, 60.22%, 24.08%, 32% and 58.0%, respectively. The homogeneous microstructure of EFTH-n/DGEBA composites was systematically analyzed using in situ Raman imaging, AFM, SEM, DMA, dynamic light scattering and the positron annihilation lifetime spectroscopy, which enabled us to attribute the improvements to the synergistic effect of the crosslinking density, free volume, intermolecular cavity, hyperbranched topological structure and good compatibility between the components, which was explained by an in situ reinforcing and toughening mechanism. We concluded that EFTH-n could significantly facilitate the degradation of the cured composites under mild conditions without using organic solvents together with a FDCA recycling yield of 56.8 wt%.
中文翻译：
可降解和可回收的生物基热固性环氧树脂
不使用有机溶剂的可降解高性能热固性塑料的设计对于理解和可持续发展同时具有补强和增韧功能的均匀结构至关重要。在这里，我们报告了一种新型的可降解和可回收的热固性超支化环氧树脂（EFTH- n），它是由生物基2，5-呋喃二甲酸（FDCA）合成的。EFTH- n在双酚A的普通二缩水甘油醚（DGEBA）上表现出优异的性能，同时将冲击强度，拉伸强度，弯曲强度，储能模量和伸长率提高了181.84％，60.22％，24.08％，32％和分别为58.0％。EFTH- n / DGEBA复合材料的均匀微观结构使用原位拉曼成像，AFM，SEM，DMA，动态光散射和正电子an没寿命光谱学，这使我们能够将改善归因于交联密度，自由体积，分子间空腔，超支化拓扑结构以及两者之间的良好相容性的协同效应组件，这是通过原位增强和增韧机制来解释的。我们得出的结论是，在不使用有机溶剂的情况下，EFTH- n可以显着促进固化复合材料的降解，而FDCA的回收率为56.8 wt％。
更新日期：2020-07-06
中文翻译：
可降解和可回收的生物基热固性环氧树脂
不使用有机溶剂的可降解高性能热固性塑料的设计对于理解和可持续发展同时具有补强和增韧功能的均匀结构至关重要。在这里，我们报告了一种新型的可降解和可回收的热固性超支化环氧树脂（EFTH- n），它是由生物基2，5-呋喃二甲酸（FDCA）合成的。EFTH- n在双酚A的普通二缩水甘油醚（DGEBA）上表现出优异的性能，同时将冲击强度，拉伸强度，弯曲强度，储能模量和伸长率提高了181.84％，60.22％，24.08％，32％和分别为58.0％。EFTH- n / DGEBA复合材料的均匀微观结构使用原位拉曼成像，AFM，SEM，DMA，动态光散射和正电子an没寿命光谱学，这使我们能够将改善归因于交联密度，自由体积，分子间空腔，超支化拓扑结构以及两者之间的良好相容性的协同效应组件，这是通过原位增强和增韧机制来解释的。我们得出的结论是，在不使用有机溶剂的情况下，EFTH- n可以显着促进固化复合材料的降解，而FDCA的回收率为56.8 wt％。
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