虫白蜡高级烷醇微乳液的制备及其在功能饮料中的应用

Preparation of Microemulsion with Policosanol Derived from Insect Wax and Its Application in Functional Beverage

为解决虫白蜡高级烷醇不溶于水,难应用于澄清稳定型功能饮料的瓶颈问题,制备高负载量的高级烷醇微乳液,获得其最佳乳化条件,通过伪三元相图确定微乳区域,评价其稳定性,并将其作为功能性添加剂配制高级烷醇功能饮料。结果表明:当复配乳化剂亲水亲油平衡值为10,乳化温度为70~75 ℃时,得到各添加剂用量均在食品国家标准允许添加范围内的稳定澄清的高级烷醇微乳液;微乳的离心、冷热循环和稀释稳定性良好,室温贮藏65 d后依然稳定透明;伪三元相图中微乳区域随着Km值的减小而不断缩小;微乳与其他辅料复配后可以制备成透明稳定的高级烷醇功能饮料。将虫白蜡高级烷醇制备成微乳,有效解决了其不溶于水以及在饮料中稳定性差、极易上浮等问题,为制备高品质、透明稳定的高级烷醇功能饮料提供了一条有效途径,也为高级烷醇新产品的开发研究提供参考。

The poor water solubility of policosanol hinders it from being applied in clear and stable functional beverages. To solve this bottleneck problem, a microemulsion with high loading of policosanol was prepared in this study. The optimum emulsi fication conditions were obtained. The microemulsion area was determined by constructing a pseudo-ternary-phase diagram and the stability was evaluated. The microemulsion was used as a functional ingredient in beverage. The results indicated that the microemulsion, prepared with an emulsi fier mixture with a hydrophile-lipophile balance (HLB) value of 10 at emulsifying temperatures of 70-75 ℃, was stable and transparent, in which the amount of each additive was within the limits of the national standards for food safety. The microemulsion was stable against centrifugation, alternating hot and cold cycles and dilution. It was stable and transparent for 65 days at room temperature. With the decrease of the K m value, the microemulsion area in the pseudo-ternary-phase diagram decreased. A stable and transparent functional beverage was prepared based on the policosanol-loading microemulsion. The microemulsification of policosanol effectively improved its poor water solubility and stability in beverage, which provides a valid way of preparing high quality, transparent and stable functional beverage containing policosanol and lays the foundation for the development of new products.