Effect of polyelectrolyte mono-and bilayer formation on the colloidal stability of layered double hydroxide nanoparticles

Zoltán Somosi, Marko Pavlovic, I. Pálinkó, István Szilágyi

Research output: Article

3 Citations (Scopus)

Abstract

Sequential adsorption of polyelectrolytes on nanoparticles is a popular method to obtain thin films after deposition. However, the effect of polyelectrolyte multilayer formation on the colloidal stability of the nanoparticles has not been studied in detail. In the present work, layered double hydroxides (LDH) were synthesized and interaction with oppositely and like-charged polyelectrolytes was investigated. Electrophoretic and light scattering measurements revealed that colloidal stability of LDH can be tuned by adsorption of poly(styrene sulfonate) (PSS) on the oppositely charged LDH surface in appropriate doses and thus, unstable or stable dispersions can be designed. Negatively charged LDH of adsorbed PSS monolayer was obtained and a poly(diallyldimethyl ammonium chloride) (PDADMAC) second layer was systematically built on the particles. The obtained polyelectrolyte bilayer provided high colloidal stability for the LDH-PSS-PDADMAC dispersions due to the presence of repulsive interparticle forces of electrostatic and steric origin. The results provide crucial quantitative information on designing highly stable particle-polyelectrolyte systems for the preparation of thin films or immobilization of guest substances between the layers for delivery processes.

Original languageEnglish
Article number986
JournalNanomaterials
Volume8
Issue number12
DOIs
Publication statusPublished - dec. 1 2018

Fingerprint

Hydroxides
Polyelectrolytes
Nanoparticles
Ammonium Chloride
Dispersions
Adsorption
Thin films
Styrene
Light scattering
Electrostatics
Monolayers
Multilayers
hydroxide ion

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)

Cite this

Effect of polyelectrolyte mono-and bilayer formation on the colloidal stability of layered double hydroxide nanoparticles. / Somosi, Zoltán; Pavlovic, Marko; Pálinkó, I.; Szilágyi, István.

In: Nanomaterials, Vol. 8, No. 12, 986, 01.12.2018.

Research output: Article

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