不同电荷密度的带相反电荷聚电解质长时间孵育后聚苯乙烯硫酸酯乳胶颗粒吸附层厚度和电泳的时间变化
Temporal Changes of Adsorbed Layer Thickness and Electrophoresis of Polystyrene Sulfate Latex Particles after Long Incubation of Oppositely Charged Polyelectrolytes with Different Charge Densities.
作者信息
Doan Thi Hai Yen, Pham Tien Duc, Hunziker Johan, Hoang Thu Ha
机构信息
Faculty of Chemistry, University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam.
Graduate School of Science, Technology and Innovation, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan.
出版信息
Polymers (Basel). 2021 Jul 21;13(15):2394. doi: 10.3390/polym13152394.
The different desorption concepts of the two polyelectrolytes PTMA5M and PTMC5M, which have similar molecular weights and differ in the charge density on the polystyrene sulfate latex (PSL) particles by 25 times, and with various charge densities in a long incubation, were systematically investigated based on hydrodynamic adsorbed layer thickness (δ) and electrophoretic mobility (EPM) under two ionic strengths in the present study. Herein, in the case of highly charged polyelectrolyte PTMA5M, desorption continued for 4 h and re-adsorbing proceeded after a longer incubation time higher than 4 h. Meanwhile, in the case of lowly charged polyelectrolyte PTMC5M, an adsorption-desorption equilibrium was suggested to take into account the unchanging of both δ and EPM.
在本研究中，基于流体动力学吸附层厚度（δ）和电泳迁移率（EPM），系统地研究了两种聚电解质PTMA5M和PTMC5M不同的解吸概念。这两种聚电解质分子量相似，但在聚苯乙烯磺酸盐胶乳（PSL）颗粒上的电荷密度相差25倍，且在长时间孵育中有各种电荷密度。在此，对于高电荷聚电解质PTMA5M，解吸持续4小时，在高于4小时的较长孵育时间后重新吸附继续进行。同时，对于低电荷聚电解质PTMC5M，考虑到δ和EPM两者不变，表明存在吸附 - 解吸平衡。
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