Mechanically Tunable and Reconstructable Lignin Thermosets via “Click” Chemistry and Surface Functionalization
Mechanically Tunable and Reconstructable Lignin Thermosets via “Click” Chemistry and Surface Functionalization
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DOI：
10.1021/acs.macromol.2c02428
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发表时间：
2023-03
期刊：
影响因子：
5.5
通讯作者：
Yishayah Bension;L. B. Kurnaz;T. Ge;Chuanbing Tang
中科院分区：
文献类型：
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作者：
Yishayah Bension;L. B. Kurnaz;T. Ge;Chuanbing Tang
在最丰富的生物质中，木质素是制造可持续材料的一种有吸引力但具有挑战性的原料。木质素的多酚结构和球状结构使其成为一种机械弱的材料，用于聚合物复合材料。在这项工作中，木质素通过巯基化学与功能化硅醚基团进行表面改性，交联以产生可重建的热固性物质。这些热固性材料不仅表现出增强的机械性能，而且还表现出改进的可降解性。通过不同交联剂的合成，探讨了不同交联剂的构效关系。改变交联密度和交联剂的尺寸对最终热固性材料的力学性能有很大影响。此外，还探讨了这些热固性材料在基本环境下转化为初始基序的化学循环。
Among the most abundant biomass, lignin is an appealing yet challenging feedstock for manufacturing sustainable materials. The polyphenolic structure and globular architecture of lignin makes it a mechanically weak material for being incorporated in polymer composites. Upon surface modification with functionalized silyl ether groups via thiol-ene chemistry in this work, lignin was cross-linked to create reconstructable thermosets. These thermosets exhibit not only enhanced mechanical properties but also improved degradability. The synthesis of different cross-linkers was used to explore the structure–property relationship. Altering the cross-linking density and the size of cross-linkers has a large impact on the mechanical properties of the final thermosets. Furthermore, the chemical recycling of these thermosets was explored for the conversion to initial motifs under basic environments.