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用Poisson-Boltzmann方程,计算了在具有单价离子的电解质溶液中均匀地带同号电荷的两无限大平行平板间的有效相互作用,以及用Derjaguin近似研究了边界对带电胶体球的影响.不考虑微离子相互作用时,两带电平板只有排斥作用,而且边界条件(面电荷密度)的改变对它们之间的有效相互作用影响不大.带电平板与带电胶体球之间的相互作用也有类似规律.
关键词:
Poisson-Boltzmann方程
Derjaguin近似
双电层
渗透压 相似文献
2.
The dynamics of two confined colloidal particles is studied by means
of Brownian dynamics simulation. The autocorrelation function and
cross-correlation function of the two colloidal spheres are computed
by utilizing the formulae of hydrodynamic diffusion matrix expanded
to different orders, as well as the accurate tensor through
numerical algorithm. Furthermore, the numerical results are compared
with the experimental results and the theoretical approximation. It
is found that the relatively simple theoretical approximation gives
good predictions when two spheres are far away from each other, but
fails when the two spheres are very close. 相似文献
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