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  Synthesis and physicochemical properties of dual-responsive acrylic acid/butyl acrylate cross-linked nanogel systems

Ashrafizadeh, M., Tam, K. C., Javadi, A., Abdollahi, M., Sadeghnejad, S., & Bahramian, A. (2019). Synthesis and physicochemical properties of dual-responsive acrylic acid/butyl acrylate cross-linked nanogel systems. Journal of Colloid and Interface Science, 556, 313-323. doi:10.1016/j.jcis.2019.08.066.

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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: Dual pH- and thermo-responsive nanogel, Acrylic acid/butyl acrylate, Emulsion polymerization, Morphology transformation, Dual physical and chemical cross-linking
 Abstract: Hypothesis A cross-linked amphiphilic nanogel containing a high mole of hydrophilic pH-responsive moiety can provide enhanced functionality regarding stimuli-responsiveness, water-dispersibility, hydrophobic substance loading, and structural stability under harsh environmental conditions. These nanogels could be synthesized using a one-pot procedure for large-scale applications. Moreover, the interplay of various interaction forces in these colloidal systems is being investigated. Experiments Model nanogels consisting of acrylic acid-butyl acrylate-ethylene glycoldimethacrylate were synthesized using an emulsion copolymerization via a seeded semi-batch process under an acidic condition. The structures were assessed by Fourier transform infrared spectroscopy and potentiometric-conductometric titrations. Zeta potential, field-emission scanning electron microscopy, and transmission electron microscopy were used to evaluate the dispersion stability, size distribution, and structural distribution, respectively. Their stimuli-responsive behavior was studied by combining static and dynamic light scattering and titration analyses. Findings Monodisperse nanospheres of approximately 150 nm were successfully prepared by implementing a one-pot practical pathway. These nanogels displayed a dual thermo- and pH-responsive behavior, reflecting the high efficiency of physical cross-linking make it ideal for drug delivery and oil industry applications. Moreover, a novel symmetric pH-activated morphology transformation behavior was revealed. Accordingly, a compositional distribution was proposed and assessed by exploring the polymerization process.

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Language(s): eng - English
 Dates: 2019-08-242019
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.jcis.2019.08.066
BibTex Citekey: ASHRAFIZADEH2019313
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Title: Journal of Colloid and Interface Science
  Abbreviation : J. Colloid Interface Sci.
Source Genre: Journal
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Publ. Info: Amsterdam etc. : Elsevier Inc.
Pages: - Volume / Issue: 556 Sequence Number: - Start / End Page: 313 - 323 Identifier: ISSN: 0021-9797