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固体脂质结构固体脂质防晒粒性能的影响
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摘要
主要研究固体脂质结构固体脂质防晒粒性能的影响,实验通过研究脂肪酸、脂肪醇和酯类三种固体脂质微粒对固体脂质纳米颗粒(NLC)粒径、电位、pH、紫外防晒性能和光照稳定性的影响。实验结果表明:所有固体脂质防晒粒粒径在200nm左右,PDI均低于0.35,并且电位的绝对值均高于50mv;固体脂质为脂肪酸的体系pH呈中性,其他呈碱性;不同固体脂质形成固体脂质防晒粒中,脂肪醇形成的NLC由于粒径较小,其防晒性能越好;固体脂质防晒粒的光照稳定性优于普通乳液,且固体脂质为脂肪酸的光稳定性优于脂肪醇和酯类;综上该三种固体脂质均能够制备出固体脂质防晒粒,且拥有很好的特性和稳定性。
In this study,fatty alcohol,fatty acid and ester were used to investigate solid lipid's structure impact on nanostructured lipid carriers encapsulated with sun filter.The following physicochemical properties have been evaluated:particle size,zeta potential(ZP),pH and UV Performance.As a result,the particle size of NLCs was about 200 nm with PDI below 0.35 and zeta potential above 50 mv.When the solid lipid was fatty acids,the system present the neutral.While the others present the alkaline.Fatty alcohol has the strongest UV protection properties because of the smallest particle size.In vitro photo-stability,the fatty acids seemed to be the strongest solid lipid at enhancing the NLCs photo-stability.All the NLCs display a significant ability against conventional emulsion.All results indicated the three solid lipids can form NLCs and present diversity effects on characterization and stability.
引文
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