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Multiphase Coacervates Driven by Electrostatic Correlations
ACS Macro Letters ( IF 5.1 ) Pub Date : 2021-07-27 , DOI: 10.1021/acsmacrolett.1c00282 Xu Chen 1 , Er-Qiang Chen 1 , An-Chang Shi 2 , Shuang Yang 1
ACS Macro Letters ( IF 5.1 ) Pub Date : 2021-07-27 , DOI: 10.1021/acsmacrolett.1c00282 Xu Chen 1 , Er-Qiang Chen 1 , An-Chang Shi 2 , Shuang Yang 1
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The liquid–liquid phase separation of a polyelectrolyte solution containing one type of negatively and two types of positively charged polymers with different charge densities is studied theoretically by random phase approximation (RPA). It is predicted that multicoacervate phases could coexist, driven purely by electrostatic correlations. The asymmetry of the linear charge density could induce an effective immiscibility between two positively charged polyelectrolytes, leading to the multiphase separation. Adding salt will induce the disappearance of the dilute phase, forming two coexisting complex phases, instead of fusion between coacervates. Raising temperature could either induce a two coexisting complex phase, or a dilute phase coexisting with a coacervate phase, depending on the bulk concentration. Our predictions are in good agreement with experiments and provide insights in the further designing of the multiphase coacervation system.
中文翻译：
静电相关驱动的多相凝聚层
通过随机相近似（RPA）从理论上研究了含有一种带负电聚合物和两种带正电聚合物的具有不同电荷密度的聚电解质溶液的液-液相分离。据预测，多凝聚相可以共存，纯粹由静电相关驱动。线性电荷密度的不对称性可以在两种带正电荷的聚电解质之间引起有效的不混溶，从而导致多相分离。添加盐会导致稀相消失，形成两个共存的复杂相，而不是凝聚层之间的融合。升高温度可以诱导两个共存的复合相，或与凝聚相共存的稀相，这取决于体积浓度。
更新日期：2021-08-17
中文翻译：
静电相关驱动的多相凝聚层
通过随机相近似（RPA）从理论上研究了含有一种带负电聚合物和两种带正电聚合物的具有不同电荷密度的聚电解质溶液的液-液相分离。据预测，多凝聚相可以共存，纯粹由静电相关驱动。线性电荷密度的不对称性可以在两种带正电荷的聚电解质之间引起有效的不混溶，从而导致多相分离。添加盐会导致稀相消失，形成两个共存的复杂相，而不是凝聚层之间的融合。升高温度可以诱导两个共存的复合相，或与凝聚相共存的稀相，这取决于体积浓度。
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