Assembly of Metal–Phenolic Networks on Water-Soluble Substrates in Nonaqueous Media,Advanced Functional Materials

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Assembly of Metal–Phenolic Networks on Water-Soluble Substrates in Nonaqueous Media
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-03-10 , DOI: 10.1002/adfm.202111942
Omid Mazaheri _{1,

2,

3} , Masood S. Alivand ₂ , Ali Zavabeti ₂ , Steve Spoljaric ₂ , Shuaijun Pan ₂ , Deli Chen _{1,

3} , Frank Caruso _{2,

3} , Helen C. Suter _{1,

3} , Kathryn A. Mumford _{2,

3}

Affiliation

Interfacial modular assemblies of eco-friendly metal–phenolic networks (MPNs) are of interest for surface and materials engineering. To date, most MPNs are assembled on water-stable substrates; however, the self-assembly of MPNs on highly water-soluble substrates remains unexplored. Herein, a versatile approach is reported to engineer thickness-tunable coatings (2–25 µm) on a water-soluble substrate (i.e., urea) via the self-assembly of MPNs in a nonaqueous solvent (i.e., acetonitrile). The coordination-driven assembly of the MPN coatings in the nonaqueous solvent is distinct from that in aqueous systems, as the assembly is only achieved following the addition of urea granules into the iron–tannin solution. The coating occurs relatively rapidly (5–60 min), generating micrometer-thick coatings from the adsorption of Fe^III–TA complexes and micrometer-sized Fe^III–TA particles formed in solution. The straightforward nature of the present fabrication method in generating thick and robust coatings with high stability in nonaqueous environments (including at 60 °C) coupled with the broad range of available naturally abundant polyphenol–metal ion combinations expand the applicability of MPNs as coatings for water-soluble materials, thus providing new opportunities for their broader application in a range of industrial processes and applications.

中文翻译：

在非水介质中的水溶性基材上组装金属-酚醛网络

环保金属酚醛网络 (MPN) 的界面模块化组件对表面和材料工程具有重要意义。迄今为止，大多数 MPN 组装在水稳定基板上。然而，MPNs 在高水溶性底物上的自组装仍未被探索。本文报道了一种通用方法，通过 MPN 在非水溶剂（即乙腈）中的自组装，在水溶性基材（即尿素）上设计厚度可调涂层（2-25 µm）。MPN 涂层在非水溶剂中的配位驱动组装与水系统中的组装不同，因为只有在将尿素颗粒添加到铁-单宁溶液中后才能实现组装。^{涂层发生相对较快（5-60 分钟），通过吸附 Fe III}生成微米厚的涂层-TA 配合物和微米级的 Fe ^III -TA 颗粒在溶液中形成。本制造方法的直接性质是在非水环境（包括 60°C）中产生具有高稳定性的厚而坚固的涂层，再加上广泛的可用天然丰富的多酚-金属离子组合，扩大了 MPN 作为水涂层的适用性-可溶性材料，从而为它们在一系列工业过程和应用中的更广泛应用提供了新的机会。

更新日期：2022-03-10

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