Salt-Enhanced CO2-Responsiveness of Microgels,ACS Macro Letters

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Salt-Enhanced CO2-Responsiveness of Microgels
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-10-23 , DOI: 10.1021/acsmacrolett.0c00617
Xiaofei Wang ₁ , Huijuan Qiu ₁ , Qingshi Wu ₂ , Jianda Xie ₃ , Shiming Zhou ₄ , Weitai Wu ₁

Affiliation

Here, we report a distinct mechanism for harnessing CO₂-responsiveness through enhancing CO₂ capture ability. The finding is demonstrated on the microgels that are composed of oligo(ethylene glycol) and sulfonate moieties. Laser light scattering studies on dilute aqueous dispersion of these microgels indicated a low CO₂-responsivity, which can be significantly enhanced by adding NaCl and other salts. This salt-enhanced CO₂-responsiveness of microgels can be elucidated by the antipolyelectrolyte behavior and its superposition of forming cross-links physically with CO₂ as an intermediate. Further results of the filtration experiments on microgel translocation through pores suggest the feasibility of the explanation. The finding is also supported by the CO₂ capture-release experiments on the dispersion, which can reversibly absorb and desorb CO₂.

中文翻译：

微凝胶的盐增强 CO2 响应性

在这里，我们报告了一种通过增强 CO ₂捕获能力来利用 CO _{2响应性的独特机制。}这一发现在由低聚（乙二醇）和磺酸盐部分组成的微凝胶上得到证实。对这些微凝胶的稀水分散体进行的激光散射研究表明，CO ₂响应度较低，通过添加 NaCl 和其他盐可以显着增强该响应度。微凝胶的这种盐增强的 CO ₂响应性可以通过抗聚电解质行为及其与 CO _{2物理形成交联的叠加来阐明}作为中间人。微凝胶通过孔易位的过滤实验的进一步结果表明该解释的可行性。_{对分散体进行的 CO 2}捕获-释放实验也支持这一发现，该分散体可以可逆地吸收和解吸 CO ₂。

更新日期：2020-11-17

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