叶黄素油悬液稳定性研究

Study on the stability of lutein oil suspension

以叶黄素油悬液稳定性系数R%值为指标,从流变学、油悬液黏度、粒径、叶黄素晶体中脂肪酸含量等方面对其稳定性进行了研究,同时考察了加速试验下粒子形态的稳定性。结果表明:随着放置温度的升高,叶黄素晶体颗粒会发生团聚,加剧油悬液分层。随着粒径的增大、黏度的降低,稳定性系数R%下降、流变学系数升高。晶体中值粒径D_(50)和油悬液体系黏度μ值满足某一范围且D_(50)^(2)/μ越小,体系越稳定。叶黄素晶体中脂肪酸含量对油悬液的黏度影响较大,合适的脂肪酸含量有利于提高油悬液的稳定性。

The stability coefficient R%of the lutein oil suspension was used as the index,rheology,oil suspension viscosity,particle size,and fatty acid content in lutein crystals were investigated.The stability of particle morphology under accelerated test was also studied.The results showed that lutein crystal particles aggregated and the stratification increased with the increase of storage temperature.Furthermore,as particle size increase,the stability coefficient R%decreased,the rheological coefficient increased,and viscosity decreased.The median diameter D_(50) of crystals and viscosity μ of oil suspension were within in a certain range,the smaller of D_(50)^(2)/μ,the more stable the system.The fatty acids content in lutein crystals had a greater impact on its oil suspension viscosity.Therefore,proper fatty acid content can improve the stability of lutein oil suspension.