米糠蜡和植物高熔点酒精混合物的油凝胶能力。,Journal of Oleo Science

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米糠蜡和植物高熔点酒精混合物的油凝胶能力。
Journal of Oleo Science ( IF 1.6 ) Pub Date : 2019-08-02 , DOI: 10.5650/jos.ess19058
Midori Endo ₁ , Masashi Shibata ₁

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由于米糠蜡的可用性和相对较高的熔点，它可以在食品和化妆品中用作油固化剂。研究了向蜡中添加高熔点醇以优化其性能。此类醇通过米糠蜡或巴西棕榈蜡的水解来制备。这些醇的熔点为〜80°C，高于米糠蜡，并且由烷基链长度为C24至C34的烃组成，比可商购获得的高级醇中的烷基链长得多。仅用米糠蜡作为固化剂制成的油凝胶的硬度低于常规烃蜡凝胶，对于在口红和润唇膏等棒状化妆品中的实际使用而言太低。高熔点醇与米糠蜡的掺混量为10-20％，导致凝胶硬度显着提高，与烃蜡的凝胶硬度相当。在市售的熔点较低的高级醇和酯中未观察到对米糠蜡的影响。基于用SEM观察到的微观结构的变化，添加高熔点醇后米糠蜡的凝胶硬度提高可能是由最初存在于凝胶中的球形簇消失所致，导致形态接近均一。

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Oil Gelation Ability of a Rice Bran Wax and Botanical High-Melting-Point Alcohol Mixture.

Due to its availability and relatively high melting point, rice bran wax can be used in foods and cosmetics as an oil solidifying agent. The addition of high-melting-point alcohols to the wax to optimize its performance was investigated. Such alcohols were prepared by the hydrolyzation of rice bran wax or carnauba wax. These alcohols had melting points of ～80°C, higher than that of rice bran wax, and consisted of hydrocarbons with alkyl chain lengths ranging from C24 to C34, much longer than the alkyl chains found in commercially available higher alcohols. Oil gel made with only rice bran wax as a solidifying agent has lower hardness than the conventional hydrocarbon wax gel, too low for practical usage in stick cosmetics such as lipsticks and lip creams. Blending high-melting-point alcohols with rice bran wax at 10-20% led to marked increase in gel hardness, equivalent to the gel hardness of the hydrocarbon wax. This effect on rice bran wax was not observed in commercially available higher alcohols and esters with lower melting points. Based upon the change in microstructure observed with SEM, the improved gel hardness of the rice bran wax upon addition of high-melting-point alcohols was probably induced by the disappearance of spherical clusters, originally presented in the gel, resulting in close to uniform morphology.

更新日期：2019-11-01

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