Radeva Tsetska, Kamburova Kamelia
Rostislaw Kaischew Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
J Colloid Interface Sci. 2006 Jan 15;293(2):290-5. doi: 10.1016/j.jcis.2005.06.066. Epub 2005 Aug 2.
Complexation between sodium carboxymethylcellulose (NaCMC) and ellipsoidal particles of oppositely charged beta-FeOOH is studied using electric light scattering and electrophoresis. We focus on the complex behavior for overcharging of the particle surface. In this case, the fraction of condensed counterions on NaCMC is found to remain unchanged during polymer adsorption onto a weakly charged particle surface. Using the theory of Sens and Joanny, we evaluate the fraction of condensed counterions and compare it with results for nonadsorbed NaCMC. The polarization of condensed counterions along the chain of the adsorbed macromolecule is proved to create the electro-optical effect in suspensions stabilized by NaCMC adsorption.
利用电光散射和电泳技术研究了羧甲基纤维素钠（NaCMC）与带相反电荷的椭球形β-FeOOH颗粒之间的络合作用。我们关注颗粒表面过度充电的复杂行为。在这种情况下，发现NaCMC上凝聚反离子的分数在聚合物吸附到弱带电颗粒表面的过程中保持不变。利用森斯和乔阿尼的理论，我们评估了凝聚反离子的分数，并将其与未吸附的NaCMC的结果进行比较。结果表明，凝聚反离子沿吸附大分子链的极化在由NaCMC吸附稳定的悬浮液中产生了电光效应。
