Preparation and characterization of poly(acrylic acid)-based nanoparticles

Reka Melinda Molnar, Magdolna Bodnar, John F. Hartmann, J. Borbély

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The present investigation describes the synthesis and characterization of nanoparticles based on poly(acrylic acid) (PAA) intramolecularly cross-linked with diamine, 2,2′-(ethylenedioxy)bis(ethylamine), using water-soluble carbodiimide. The aqueous colloid dispersions of nanoparticles were clear or mildly opalescent depending on the ratio of cross-linking, pH of the solution, and the molecular weight of PAA, finding consistent with values of transmittance between 3% and 99%. The structure was determined by nuclear magnetic resonance spectroscopy, and the particle size was identified by dynamic light scattering (DLS) and transmission electron microscopy (TEM) measurements. It was found that particle size depends on the pH, and at a given pH, it was caused by the ratio of cross-linking and the molecular weight of PAA. Particle size measured by TEM varied in the range of 20 and 80 nm. In the swollen state, the average size of the particles measured by DLS was in the range of 35-160 nm.

Original languageEnglish
Pages (from-to)739-744
Number of pages6
JournalColloid & Polymer Science
Volume287
Issue number6
DOIs
Publication statusPublished - 2009

Fingerprint

carbopol 940
acrylic acid
Acrylics
Particle size
Dynamic light scattering
Nanoparticles
nanoparticles
preparation
Acids
Molecular weight
Transmission electron microscopy
Carbodiimides
molecular weight
light scattering
Diamines
Colloids
Light transmission
Dispersions
transmission electron microscopy
Nuclear magnetic resonance spectroscopy

Keywords

  • Cross-linking
  • Nanoparticles
  • Poly(acrylic acid)

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry
  • Colloid and Surface Chemistry

Cite this

Preparation and characterization of poly(acrylic acid)-based nanoparticles. / Melinda Molnar, Reka; Bodnar, Magdolna; Hartmann, John F.; Borbély, J.

In: Colloid & Polymer Science, Vol. 287, No. 6, 2009, p. 739-744.

Research output: Contribution to journalArticle

Melinda Molnar, Reka ; Bodnar, Magdolna ; Hartmann, John F. ; Borbély, J. / Preparation and characterization of poly(acrylic acid)-based nanoparticles. In: Colloid & Polymer Science. 2009 ; Vol. 287, No. 6. pp. 739-744.
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