W. Liang¹, J. R. Guman-Sepulveda², S. He¹, A. Dogariu², J. Y. Fang^1*

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¹ Department of Materials Science and Engineering, The College of Optics and Photonics, University of Central Florida, Orlando, USA.
² CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, USA.
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Abstract: A hydrogel is formed by the self-assembly of sodium deoxycholate (NaDC) in aqueous solution with sodium chloride at pH-7.0. The NaDC hydrogel made of the three-dimensional network of nanofibers shows pH-dependent swelling behaviors. Polystyrene particles with a diameter of 100 nm and doxorubicin hydrochloride (DOX) can be easily loaded into the NaDC hydrogel through swelling. By using the loaded polystyrene particles as a light scattering probe, we study the microrheology of the NaDC hydrogel, showing complex viscoelastic properties. The viscous component dominates at both low and high frequencies, while the elastic component dominates in the intermediate range. The cavity size of the nanofiber network can also be estimated to be ~180 nm. We show that the loaded DOX can be slowly released from the hydrogels into aqueous solution. The release profile of DOX is found to depend on the pH value of the solution.

Keywords: Sodium Deoxycholate, Self-Assembly, Hydrogels, Microrheology, Swelling, Release

Cite this paper: Liang, W. , Guman-Sepulveda, J. , He, S. , Dogariu, A. and Fang, J. (2015) Microrheology and Release Behaviors of Self-Assembled Steroid Hydrogels. Journal of Materials Science and Chemical Engineering, 3, 6-15. doi: 10.4236/msce.2015.38002.

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