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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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