Journal
BIOMACROMOLECULES
Volume 10, Issue 3, Pages 547-554Publisher
AMER CHEMICAL SOC
DOI: 10.1021/bm801206f
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The entrapment of two hydrophobic molecules, benzophenone and tamoxifen, into self-assembling cyclodextrin (CD)-based nanogels has been studied. These nanogels formed spontaneously upon the association of a hydrophobically modified dextran (MD) and a cyclodextrin polymer (p beta CD). The interactions of benzophenone and tamoxifen with MD and p beta CD were investigated using phase solubility studies, circular dichroism, and isothermal titration calorimetry. Both hydrophobic molecules were included into the CD cavities of the p beta CD and were also solubilized by MD into its hydrophobic microdomains. We took advantage of these interactions to form benzophenone- and tamoxifen-loaded nanogels. The highest benzophenone loadings were obtained by solubilizing it in both p beta CD and MD solutions before mixing them to form nanogels. These studies open new possibilities of applications of the nanogels, mainly in the cosmetic field, as sun screen carriers prepared by a simple green technology.
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