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  Dual physically and chemically cross-linked polyelectrolyte nanohydrogels: Compositional and pH-dependent behavior studies

Ashrafizadeh, M., Tam, K. C., Javadi, A., Abdollahi, M., Sadeghnejad, S., & Bahramian, A. (2020). Dual physically and chemically cross-linked polyelectrolyte nanohydrogels: Compositional and pH-dependent behavior studies. European Polymer Journal, 122: 109398. doi:10.1016/j.eurpolymj.2019.109398.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-C4DC-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-C4DD-5
Genre: Journal Article

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 Creators:
Ashrafizadeh, Marjan, Author
Tam, Kam Chiu, Author
Javadi, Aliyar1, Author              
Abdollahi, Mahdi, Author
Sadeghnejad, Saeid, Author
Bahramian, Alireza, Author
Affiliations:
1Reinhard Miller, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863501              

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Free keywords: Acrylic acid/butyl acrylate nanohydrogel, Dual physical and chemical cross-linking, Titration and characterization, pH-Responsive swelling, Counterion association
 Abstract: This study describes the composition-property relationship of a dual chemically and physically cross-linked nanohydrogel (NHG) containing a high concentration of hydrophilic pH-sensitive acrylic acid (AA). The physical and chemical cross-linking were incorporated using the aggregation of hydrophobic butyl acrylate (BA) and covalent bond of a bifunctional monomer (ethylene glycol dimethacrylate), respectively. Implementing a direct one-pot semi-batch emulsion polymerization technique in an acidic condition yielded monodispersed (PDI < 0.2) NHGs with a collapsed hydrodynamic radius of 60–100 nm. Titration studies revealed the significant effect of the chemical and physical cross-linking on the amounts of accessible carboxyl groups and their ionization behavior. These NHG dispersions displayed good colloidal stability over a wide pH and duration, the Donnan equilibrium is responsible for the observed swelling behavior of these NHGs.

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Language(s): eng - English
 Dates: 2019-11-302020
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1016/j.eurpolymj.2019.109398
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Title: European Polymer Journal
  Other : Eur. Polym. J.
Source Genre: Journal
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Publ. Info: Amsterdam : Pergamon
Pages: - Volume / Issue: 122 Sequence Number: 109398 Start / End Page: - Identifier: ISSN: 0014-3057