Nanostructured Oil in Cosmetic Paraffin Waxes

作者：Wang Fan C; Miyazaki Yukihiro; Marangoni Alejandro G^*

来源：Crystal Growth & Design, 2018, 18(5): 2677-2680.

DOI：10.1021/acs.cgd.8b00042

This work examines the oil-binding behavior of cosmetic paraffin wax-mineral oil systems using powder X-ray diffraction (XRD), differential scanning calorimetry (DSC), and pulsed nuclear magnetic resonance (pNMR). Neat paraffin wax crystals and paraffin wax oleogels crystallized into the same polymorphic forms; however, the oleogels had a larger lamellar thickness and crystal domain size. This increase in lamellar size could indicate that the oil was structured in between individual wax crystalline lamellae (i.e., nanostructured oil). The amount of crystalline material determined by pNMR of wax oleogels increased with temperature below their melting point, because interlamellar nanostructured oil lost some mobility and displayed solid-like behavior. These results provide experimental evidence for the existence of nanostructured oil, in support of simulation studies in the literature, and shed light into the oil-binding mechanism of some materials.

• 出版日期2018-5