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

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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.

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Acknowledgement

This work was supported by RET (Grant of Regional University Knowledge Center) contract number (RET-06/432/2004) and in part by ElizaNor Polymer LLC, USA.

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Authors and Affiliations

  1. Department of Colloid and Environmental Chemistry, University of Debrecen, P.O. Box 31, 4010, Debrecen, Hungary

    Reka Melinda Molnar, Magdolna Bodnar & Janos Borbely

  2. ElizaNor Polymer, LLC, 1 Woodmeadow Lane, Princeton Junction, NJ, 08550, USA

    John F. Hartmann

  3. BBS Nanotechnology Ltd., P.O. Box 12, 4225, Debrecen 16, Hungary

    Janos Borbely

Authors
  1. Reka Melinda Molnar
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  2. Magdolna Bodnar
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  3. John F. Hartmann
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  4. Janos Borbely
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Correspondence to Janos Borbely.

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Melinda Molnar, R., Bodnar, M., Hartmann, J.F. et al. Preparation and characterization of poly(acrylic acid)-based nanoparticles. Colloid Polym Sci 287, 739–744 (2009). https://doi.org/10.1007/s00396-009-2033-0

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  • DOI: https://doi.org/10.1007/s00396-009-2033-0

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