Reaction-limited Colloidal Aggregation Induced by Salt and Inert Polymers

Details Reaction-limited Colloidal Aggregation Induced by Salt and Inert Polymers Reaction-limited Colloidal Aggregation Induced by Salt and Inert Polymers

2007-08-21

arxiv.org/abs/0708.2919v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

Salt-induced aggregation of 20 nm colloidal silica is followed by light transmission, which shows an a kinetic form exp[-(t/t_0)^{\alpha}], where \alpha = 2.6 and t_0 is an empirical time constant which reflects the colloidal stability. We found a power law dependence of t_0 on ionic strength, which can be explained by the classical DLVO theory. The neutral polymers polyethylene glycol (PEG) accelerate the aggregation rate, and those with higher molecular weight are more effective in inducing the aggregation with similar stretched exponential form of kinetics. Current theories of polymer-mediated interactions provide a reasonable interpretation of the effect of PEG. The stretched exponential kinetics of the light transmission is found to be consistent with a cluster-size dynamic scaling model of aggregation.

Affiliated with

Also associated with

No associations

Rating

Reaction-limited Colloidal Aggregation Induced by Salt and Inert Polymers does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Reaction-limited Colloidal Aggregation Induced by Salt and Inert Polymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reaction-limited Colloidal Aggregation Induced by Salt and Inert Polymers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-135362