Probing Heterocoagulation in Binary Colloidal Mixtures by Simultaneous Static and Dynamic Light Scattering

abstractcts - 9820795 m。提出了静态和动态光散射同时测量二元胶体混合物中异聚集速率常数的方法。实验研究将在羧基(A)和两性离子(B)乳胶颗粒上进行。所有二聚体（AA， AB和BB）的绝对形成速率常数将被测量为溶液pH和离子强度的函数。实验数据将与Derjagurin， Landau， Vervey和Overbeek （DLVO）的理论进行比较。作者将研究dlvo理论在粒子-粒子相互作用势垒的小分离距离（1nm）下的有效性极限，在这里理论显然是失败的。拟议的工作与各种自然和工业过程中胶体颗粒的稳定、凝固和沉积有关，如水净化、矿物加工、过滤、地下水中微生物的运输和医疗应用。

AbstractCTS-9820795M. Borkovec, Clarkson U.Simultaneous static and dynamic light scattering is proposed to measure heteroaggregation rate constants in binary colloidal mixtures. The experimental study will be performed on carboxyl (A) and zwitterionic (B) latex particles. Absolute formation rate constants for all dimers (AA, AB and BB) will be measured as a function of solution pH and ionic strength. The experimental data will be compared to the theory of Derjagurin, Landau, Vervey and Overbeek (DLVO). The authors will investigate the limits of validity of DLVO-theory for small separation distances ( 1 nm) of the barrier in the particle-particle interaction potential, where the theory apparently fails. The proposed work has relevance to stabilization, coagulation and deposition of colloidal particles in various natural and industrial processes such as water purification, mineral processing, filtration, transport of microorganisms in groundwater and medical applications.