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arXiv 1507.03090cond-mat.softcond-mat.mes-hallcond-mat.mtrl-scicond-mat.stat-mech
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微泡-聚电解质络合反应的非化学计量普适性

A Non-stoichiometric Universality in Microbubble-Polyelectrolyte Complexation

Hiroshi Frusawa, Ryohei Yoshida

摘要:

我们研究了微泡(MBs)的基本电学性质,这些微泡是通过添加带相反电荷的聚电解质(PE)直接封装的。通过显微电泳方法观察到MB-PE复合物颗粒的电荷反转,揭示了MB-PE复合物溶液中不寻常的过充电行为,如下所示。阳离子PE的临界浓度不仅与其链长和分子种类无关,而且远大于化学计量中和点。因此,我们提供了一个理论草图,认为真正的微泡表面上的小阴离子的吸附-脱附动力学,这可以解释效率低下的电荷反转。

英文摘要:

We investigated the fundamental electrical properties of microbubbles (MBs) that are directly encapsulated by the addition of oppositely charged polyelectrolytes (PEs). Charge-reversal of the MB-PE complex particles has been observed by the microscopic electrophoresis method, revealing unusual overcharging behaviors in MB-PE complex solutions, as follows. The critical concentrations of cationic PEs added for overcharging were not only independent of their chain lengths and molecular species, but also much larger than stoichiometric neutralization points. Thus, we provide a theoretical sketch that considers the adsorption-desorption kinetics of small anions on the surface of genuine microbubbles, which can explain the inefficient charge-reversal.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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