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Synthesis of Cross-Linked Chitosan-Based Nanohydrogels in Inverse Miniemulsion

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Cross-linked chitosan (CS) nanohydrogels were successfully prepared via cross-linking CS nanodroplets in inverse miniemulsions. The cross-linker was transferred to the CS nanodroplets via the evaporation from its aqueous solution and diffusion through the continuous phase. The formation of cross-linked CS nanohydrogels was confirmed by the morphological investigation during the reaction and the successful preparation of acidic aqueous dispersion of CS nanohydrogels. The size and size distribution of the CS nanodroplets and nanohydrogels were characterized by dynamic light scattering (DLS). The particle morphology of CS nanohydrogels was observed by transmission electron microscopy (TEM). The influence of the synthetic parameters on the particle properties and colloidal stability was investigated with respect to sonication time, surfactant type and amount, type of low polarity solvent, and concentration of CS solution. The cross-linked CS nanohydrogels could be easily re-dispersed in water, and showed a pH sensitivity.

Document Type: Research Article

Publication date: June 1, 2013

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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