Inverse Vulcanization of Styrylethyltrimethoxysilane - Coated Surfaces, Particles and Crosslinked Materials.,Angewandte Chemie International Edition

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Inverse Vulcanization of Styrylethyltrimethoxysilane - Coated Surfaces, Particles and Crosslinked Materials.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-07-06 , DOI: 10.1002/anie.202006522
Johannes M Scheiger _{1,

2} , Chatrawee Direksilp ₃ , Patricia Falkenstein ₄ , Alexander Welle _{5,

6} , Meike Koenig ₅ , Stefan Heissler ₅ , Jörg Matysik ₄ , Pavel A Levkin ₂ , Patrick Theato _{1,

7}

Affiliation

Sulfur as a side product of natural gas and oil refining is an underused resource. Converting landfilled sulfur waste into materials merges the ecological imperative of resource efficiency with economic considerations. A strategy to convert sulfur into polymeric materials is the inverse vulcanization reaction of sulfur with alkenes. However, the materials formed are of limited applicability, because they need to be cured at high temperatures (>130 °C) for many hours. Herein, we report the reaction of elemental sulfur with styrylethyltrimethoxysilane. Marrying the inverse vulcanization and silane chemistry yielded high sulfur content polysilanes, which could be cured via room temperature polycondensation to obtain coated surfaces, particles, and crosslinked materials. The polycondensation was triggered by hydrolysis of poly(sulfur‐r‐styrylethyltrimethoxysilane) (poly(S_n‐r‐StyTMS) under mild conditions (HCl, pH 4). For the first time, an inverse vulcanization polymer could be conveniently coated and mildly cured via post‐polycondensation. Silica microparticles coated with the high sulfur content polymer could improve their Hg²⁺ ion remediation capability.

中文翻译：

苯乙烯乙基三甲氧基硅烷的逆向硫化 - 涂层表面、颗粒和交联材料。

硫作为天然气和炼油的副产品，是一种未得到充分利用的资源。将填埋的硫废物转化为材料将资源效率的生态要求与经济考虑结合起来。将硫转化为聚合物材料的策略是硫与烯烃的逆硫化反应。然而，所形成的材料的适用性有限，因为它们需要在高温（>130°C）下固化多个小时。在此，我们报道了元素硫与苯乙烯基乙基三甲氧基硅烷的反应。将反硫化和硅烷化学相结合产生了高硫含量的聚硅烷，可以通过室温缩聚来固化以获得涂层表面、颗粒和交联材料。缩聚反应是通过聚（硫磺基乙基三甲氧基硅烷）（聚（S _n-r -StyTMS ）在温和条件（HCl，pH 4）下的水解引发的。逆硫化聚合物首次可以方便地涂覆并温和地涂覆。通过后缩聚固化，涂覆高硫含量聚合物的二氧化硅微粒可以提高其Hg ²⁺离子修复能力。

更新日期：2020-07-06

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