pH值对“正丁醇-水-茶油-皂素”微乳液体系的影响  

Effect of pH Value on “N-Butanol-Water-Camellia Oil-Saponin” Microemulsion System

作　　者：刘汝宽[1] 田莞尔 刘思思[1] 林百宁 易有金[2] 肖志红[1] Liu Rukuan;Tian Waner;Liu Sisi;Lin Baining;Yi Youjin;Xiao Zhihong(State Key Laboratory of Utilization of Woody Oil Resource,Hunan Academy of forestry,Changsha 410004;College of Food Science and Technology,Hunan Agricultural University,Changsha 410128)

机构地区：[1]湖南省林业科学院木本油料资源利用全国重点实验室,长沙410004 [2]湖南农业大学食品科学技术学院,长沙410128

出　　处：《中国粮油学报》2025年第2期108-111,共4页Journal of the Chinese Cereals and Oils Association

基　　金：湖南省林业杰青培养计划项目(XLK202108-1);湖南省科技创新领军人才项目(2020RC4026)。

摘　　要：采用微乳液法萃取油茶榨饼中的多组分物质,明晰其过程因素的影响是构建高效分离工艺的基础。本研究重点探究pH值对“正丁醇-水-茶油-皂素”微乳液体系稳定性及导电性等多方面的作用效果,通过在该微乳液体系中添加磷酸氢二钠-柠檬酸钠缓冲溶液,考察体系pH值对微乳区域相对面积、电导率与乳化效率等指标的影响,结果表明:“正丁醇-水-茶油-皂素”微乳液体系中的茶皂素是一种非离子型表面活性剂,pH值的变化对其亲水性的影响较小,即H^(*)及OH^(-)浓度对该微乳体系的形成及稳定性无明显影响;此外,该微乳液体系的导电性与体系中自由离子的浓度成正比,因此当pH变化时体系中H^(*)及OH^(-)浓度发生显著变化,进而导致微乳液体系的导电性和电导率发生显著变化,这为微乳液萃取新方法应用于油茶籽加工剩余物高效利用提供参考。Clarification of the influence factors is the basis for constructing an efficient separation process by micro-emulsion method for multi-component substances extraction from Camellia oleifera cake.In order to study the effect of pH value on the microemulsion system of"n-butanol-water-camellia oil-saponin",the pH value on the relative area ratio,conductivity,and emulsification efficiency of microemulsion was investigated by addition of buffer solution of disodium hydrogen phosphate and sodium citrate into the microemulsion system of"n-butanol-water-camellia oil-saponin".The results indicated that the saponin in the microemulsion system was a non-ionic surfactant,and the change of pH value had little effect on its hydrophilicity,the concentration of H+and OH^(-)had no obvious effect on the formation and stability of the microemulsion system.However,the conductivity of the microemulsion system was proportional to the concentration of free ions in the system,therefore,when the pH of the system changed,concentration of H+and OH^(-)in the system changed significantly,resulting in significant changes in the conductivity and electrical conductivity,providing a reference for the application of microemulsion technology in the comprehensive utilization of Camellia oleifera seeds.

关 键 词：微乳液 拟三元相图 茶油 PH值 电导率 

分 类 号：TS224[轻工技术与工程—粮食、油脂及植物蛋白工程]