Using renewable substances as the raw materials, and through relatively greener synthetic processes to implement the preparation of novel functional polymers is an idea that accords with the concept of “sustainable development” and is highly desirable in nowadays polymer science. In this study, apigenin (as renewable phenol) and furfurylamine (as renewable amine) were selected to prepare bio-based benzoxazine derivative (AP-f) through Mannich reaction. Using AP-f and diphenylmethane-based diisocyanide (IC) as reactants, a type of cross-linked, semi-aromatic polyamide derivative (Bio-PA) was successfully prepared via benzoxazine-isocyanide mechanochemistry (BIC-MC) by ball milling manner. Chemical structure, elemental composition, micro morphology and stacking state properties of Bio-PA were systematically characterized here. Multiple Pb(II)-affinitive molecular fragments (phenolic hydroxyl, tertiary amine and amide) were integrated into the structure of Bio-PA. Based on this, the application of Bio-PA as “enrichment-type” Pb(II) electrochemical probe was explored subsequently. The results showed that the introduction of Bio-PA significantly improved the response of Pb(II), and the modified electrode (Bio-PA/Nafion/GCE) illustrated satisfactory detection sensitivity and selectivity.

以可再生物质为原料，通过相对绿色的合成工艺，实现新型功能聚合物的制备，符合“可持续发展”的理念，是当今高分子科学所向往的理念。本研究选择芹菜素（作为可再生苯酚）和糠胺（作为可再生胺）通过曼尼希反应制备生物基苯并恶嗪衍生物（AP-f）。以AP-f和二苯甲烷基二异氰化物（IC）为反应物，通过以下方法成功制备了一种交联的半芳族聚酰胺衍生物（Bio-PA）苯并恶嗪-异氰化物机械化学（BIC-MC）通过球磨方式。在此系统地表征了 Bio-PA 的化学结构、元素组成、微观形貌和堆积态特性。多个 Pb(II) 亲和分子片段（酚羟基、叔胺和酰胺）被整合到 Bio-PA 的结构中。基于此，随后探索了Bio-PA作为“富集型”Pb(II)电化学探针的应用。结果表明，Bio-PA的引入显着提高了Pb(II)的响应，修饰电极(Bio-PA/Nafion/GCE)表现出令人满意的检测灵敏度和选择性。