胶体悬浮液中稳定聚集体的形成。

Formation of stable clusters in colloidal suspensions.

作者信息

Kovalchuk Nina, Starov Victor, Langston Paul, Hilal Nidal

机构信息

Department of Chemical Engineering, Loughborough University, Loughborough, LE11 3TU, UK.

出版信息

Adv Colloid Interface Sci. 2009 Mar-Jun;147-148:144-54. doi: 10.1016/j.cis.2008.11.001. Epub 2008 Nov 24.

DOI:10.1016/j.cis.2008.11.001

PMID:19073333

Abstract

The experimental evidence and theoretical explanations of stable cluster formation in colloidal suspensions are reviewed. The clusters form in the intermediate range between a stable suspension built up by singlets and the irreversible coagulation or gelation of the suspension. The stable clusters develop as a result of a balance between competing short range attraction and long range repulsion between colloidal particles or due to reversible flocculation in the shallow secondary potential well. Heteroaggregation in binary colloids can also result in formation of stable clusters.

摘要

综述了胶体悬浮液中稳定聚集体形成的实验证据和理论解释。聚集体在由单颗粒构建的稳定悬浮液与悬浮液的不可逆凝聚或凝胶化之间的中间范围内形成。稳定聚集体的形成是由于胶体颗粒之间竞争的短程吸引力和长程排斥力之间的平衡，或者是由于在浅二级势阱中的可逆絮凝。二元胶体中的异质凝聚也可导致稳定聚集体的形成。