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肽类表面活性剂二(月桂酰胺谷氨酰胺)赖氨酸钠制备神经酰胺纳米乳液
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摘要
新型的肽类表面活性剂二(月桂酰胺谷氨酰胺)赖氨酸钠(DLGL)被用来制备含活性成分神经酰胺的纳米乳液。本文通过X-射线衍射法,差示扫描量热法,红外光谱法研究了DLGL分子与神经酰胺分子之间的相互作用,通过扫描电镜和透射电镜表征了纳米乳液的相貌形态,通过神经酰胺纳米乳液50℃下粒径随时间的变化表征了其稳定性。实验结果表明:DLGL可以显著降低神经酰胺的结晶度;扫描电镜和透射电镜表明纳米乳液外貌呈球形,粒径在300nm左右;50℃下储存一个月,纳米乳液粒径没有显著变化。
A novel peptide-based gemini surfactant,namely,sodium dilauramidoglutamide lysine(DLGL) was employed to fabricate a stable nanoemulsion system for the delivery of hydrophobic bioactive ceramide-2molecules.The phase properties and morphology and stability of the nanoemulsion were investigated by focusing on the interaction between DLGL and ceramide-2 molecules.The investigation of the phase properties of the mixture of DLGL and ceramide-2 by X-ray diffraction,differential scanning calorimetry,and Fourier transform infrared spectroscopy revealed remarkable reduction in the crystallinity of ceramide-2 due to the presence of DLGL.The spherical shape and nanometer size of nanoemulsions emulsified by DLGL were characterized by scanning electron microscopy and transmission electron microscopy.The nanoemulsions prepared using DLGL exhibited significant improvement in the dispersion stability without any significant changes in the particle sizes even after storing them for a month at 50 ℃.
引文
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