• Home
  1. Home
  2. Interaction forces between colloidal latex particles and their modification by polyelectrolytes
Doctoral thesis
OA Policy
English

Interaction forces between colloidal latex particles and their modification by polyelectrolytes

Contributors

Finessi, Marco

Directors

Borkovec, Michal

Defense date

2013-06-28

Abstract

This thesis focuses the attention on the interaction forces between negatively charged carboxyl and sulfate latex particles with adsorbed on them respectively different generations of cationic poly(amido amine) PAMAM dendrimers and Linear (Polyethylene imine) (LPEI) having two different molecular masses. Those systems were investigated through the colloidal probe technique based on atomic force microscopy (AFM). Tuning the dendrimers/polyelectrolytes dose adsorbed, the interaction forces are observed to switch from repulsive into attractive and back to repulsive again in the both cases. Close to the IEP, the surface of the whole particle is totally neutralized by the adsorbtion of the dendrimers/polyelectrolytes. In the case of dendrimers, this situation is described by the sum of two attractive forces: a long range van der Waals interaction and short range non-DLVO forces given by patch charge interactions. In the case of LPEI the attractive forces are described in term of the pure DLVO theory.

Keywords

  • Colloidal probe
  • AFM
  • Dendrimers
  • LPEI
  • Patch charge interactions
  • van der Waals interactions
  • Poisson-Boltzmann
  • Patch-charge interactions
  • DLVO

UNIGE affiliation entities

Citation (ISO format)

FINESSI, Marco. Interaction forces between colloidal latex particles and their modification by polyelectrolytes. Thèse, 2013. doi: 10.13097/archive-ouverte/unige:28989

Main files (1)

Thesis

Identifiers

1440views
1033downloads

Technical informations

Creation

16/07/2013 17:52:00

First validation

16/07/2013 17:52:00

Update

16/10/2026 10:27:34

Status update

16/10/2026 10:27:34

Last indexation

16/10/2026 10:39:09
All rights reserved by Archive ouverte UNIGE and the University of Geneva
OpenAIRE Indexed & Validated