Controlling the size and swellability of stimuli-responsive polyvinylpyrrolidone–poly(acrylic acid) nanogels synthesized by gamma radiation-induced template polymerization

[Display omitted] ► This study aims to develop a simple and efficient method for producing nanoscale sized gel particles by gamma radiation. ► Many parameters affecting the nanogel products were investigated in order to have a successful production of pH sensitive nanogel. ► Characterization of the...

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Bibliographic Details
Published in:European polymer journal 2013-03, Vol.49 (3), p.601-612
Main Authors: Abd El-Rehim, Hassan A., Hegazy, El-Sayed A., Hamed, Ashraf A., Swilem, Ahmed E.
Format: Article
Language:English
Subjects:
Applied sciences
Atomic force microscopy
Concentration (composition)
Covalent bonds
Exact sciences and technology
Gamma radiation
Hydrogen bonding
Interpolymer complex
Nanogel
Nanoparticles
Nanostructure
pH-sensitive
Physicochemistry of polymers
Polymerization
Polymers and radiations
Polyvinylpyrrolidone
Temperature
Template
Viscometry
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Summary:[Display omitted] ► This study aims to develop a simple and efficient method for producing nanoscale sized gel particles by gamma radiation. ► Many parameters affecting the nanogel products were investigated in order to have a successful production of pH sensitive nanogel. ► Characterization of the PVP/PAAc nanogels is carried out, including morphological structure and equilibrium swelling studies. Polymeric pH-sensitive hydrogel nanoparticles (nanogels) of narrow size distributions were directly prepared by gamma radiation-induced polymerization of acrylic acid (AAc) in an aqueous solution of polyvinylpyrrolidone (PVP) as a template polymer. The driving force of PVP/PAAc nanoparticles formation was attributed to the complexation between PAAc (proton-donor) and PVP (proton-acceptor) through the hydrogen bonding interaction. In addition to the hydrogen bonding interaction between the components, the nanoparticles are further stabilized by covalent bonds as a result of the radiation-induced crosslinking process. Particle size and swellability of the prepared nanogels can be controlled by feed composition and concentration, PVP molecular weight as well as irradiation dose, temperature, and atmosphere. The prepared PVP/PAAc nanogel particles were characterized by dynamic light scattering (DLS), viscometry, transmission electron microscopy (TEM) and atomic force microscopy (AFM) techniques.
ISSN:0014-3057
1873-1945
DOI:10.1016/j.eurpolymj.2012.12.002