Synthesis and physicochemical properties of dual-responsive acrylic acid/butyl acrylate cross-linked nanogel systems
| Autor: | Saeid Sadeghnejad, Marjan Ashrafizadeh, Alireza Bahramian, Mahdi Abdollahi, Aliyar Javadi, Kam Chiu Tam |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Butyl acrylate Dispersity Emulsion polymerization 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials chemistry.chemical_compound Colloid and Surface Chemistry Chemical engineering Dynamic light scattering chemistry Dispersion stability Zeta potential Fourier transform infrared spectroscopy 0210 nano-technology Nanogel |
| Zdroj: | Journal of Colloid and Interface Science. 556:313-323 |
| ISSN: | 0021-9797 |
| Popis: | 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 glycol dimethacrylate 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. |
| Databáze: | OpenAIRE |
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