摘要
水相萃取花生油时常形成顽固乳状液,探索利用表面活性剂提高清油得率的工艺,并对其作用机制进行探讨。利用0.15%的十二烷基硫酸钠(SDS)辅助水相萃取花生油,考察液料比、提取时间、提取温度、振荡速度及硫酸镁质量浓度对清油得率的影响,并通过中心组合设计对工艺参数进行优化。结果表明,无需加硫酸镁,在液料比3.3∶1、提取时间60 min、振荡速度180 r/min、提取温度45℃的条件下,花生清油得率可达到94.62%。说明SDS能有效提高花生油的水相萃取效率,且不需加无机盐。其机制是SDS降低了粕残油,显著减少了乳化油,这可能是其与蛋白质竞争界面膜位置的结果。
The stubborn emulsion often formed when peanut oil was obtained by aqueous extraction. The process of using surfactant to improve free oil yield and its mechanism were investigated. Peanut oil was obtained by aqueous extraction assisted by 0. 15% of sodium dodecyl sulfate（ SDS） solution. The effects of liquid- solid ratio,extraction time,extraction temperature,shaking speed and mass concentration of magnesium sulfate on the free oil yield were investigated,and the process parameters were optimized by central composite design. The results showed that without adding magnesium sulfate,the free peanut oil yield reached 94. 62% under the conditions of liquid- solid ratio 3. 3∶ 1,extraction time 60 min,shaking speed 180 r / min and extraction temperature 45 ℃. It was concluded that SDS could effectively improve the efficiency of aqueous extraction of peanut oil without inorganic salt. Its mechanism was that SDS reduced the residual oil in meal and significantly decreased the emulsified oil,which might be the result of competing with proteins for interfacial film location.
出处
《中国油脂》
CAS
CSCD
北大核心
2016年第4期5-9,共5页
China Oils and Fats
基金
安徽省高校省级自然科学研究重点项目(KJ2013A043)
国家级大学生创新训练计划项目(201410363075)
