两性离子磺酸硫聚合物：取代基和倒偶极子的影响,Macromolecules

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两性离子磺酸硫聚合物：取代基和倒偶极子的影响
Macromolecules ( IF 5.1 ) Pub Date : 2023-01-26 , DOI: 10.1021/acs.macromol.2c02359
Marcel U. Brown ₁ , Hong-Gyu Seong ₁ , Thomas P. Russell ₁ , Todd Emrick ₁

Affiliation

涉及聚合物两性离子的研究通常涉及铵基结构的制备及其作为涂层或凝胶的研究，这些涂层或凝胶赋予基材和材料亲水性和/或防污性能。最近的合成进展已经在聚合物两性离子化学方面产生了显着的扩展，特别是在阳离子部分的组成方面，这为检查聚合物两性离子作为两亲物、功能性表面活性剂和复杂乳液的组分开辟了新的可能性。本文介绍了新型两性离子磺酸硫磺酸单体的合成及其在受控自由基聚合中作为起始原料以生成相应聚合物的用途。这些新型聚合物两性离子带有磺酸硫基团，相对于先前的例子具有倒偶极子方向性，产生不同的和意想不到的物理和化学性质。例如，此处描述的聚合物两性离子可溶于多种非水溶剂，并且相对于偶极反转对应物，对亲核试剂具有更高的稳定性。此外，这些磺酸硫聚合物的两亲特性使其适合用作稳定水包油乳液的表面活性剂，这是使用传统超亲水聚合物两性离子无法实现的特性。这里描述的聚合物两性离子可溶于多种非水溶剂，并且相对于偶极倒置的对应物，对亲核试剂具有更高的稳定性。此外，这些磺酸硫聚合物的两亲特性使其适合用作稳定水包油乳液的表面活性剂，这是使用传统超亲水聚合物两性离子无法实现的特性。这里描述的聚合物两性离子可溶于多种非水溶剂，并且相对于偶极倒置的对应物，对亲核试剂具有更高的稳定性。此外，这些磺酸硫聚合物的两亲特性使其适合用作稳定水包油乳液的表面活性剂，这是使用传统超亲水聚合物两性离子无法实现的特性。

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Zwitterionic Sulfonium Sulfonate Polymers: Impacts of Substituents and Inverted Dipole

Research involving polymer zwitterions typically involves the preparation of ammonium-based structures and their study as coatings or gels that impart hydrophilicity and/or antifouling properties to substrates and materials. More recent synthetic advances have produced a significant expansion in polymer zwitterion chemistry, especially with respect to the composition of the cationic moieties that open new possibilities to examine polymer zwitterions as amphiphiles, functional surfactants, and components of complex emulsions. This article describes the synthesis of new zwitterionic sulfonium sulfonate monomers and their use as starting materials in controlled free radical polymerization to yield the corresponding polymers. These novel polymer zwitterions bear sulfonium sulfonate groups, that possess an inverted dipole directionality relative to prior examples that yields different and unexpected physical and chemical properties. For example, the polymer zwitterions described here are soluble in a wide range of nonaqueous solvents and possess significantly greater stability against nucleophiles relative to their dipole-inverted counterparts. Additionally, the amphiphilic character of these sulfonium sulfonate polymers makes them amenable to use as surfactants for stabilizing oil-in-water emulsions, a feature that is not possible using conventional ultrahydrophilic polymer zwitterions.

更新日期：2023-01-26

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