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• 工艺技术 •    下一篇

功能性油脂微胶囊的制备及其稳定性的研究

王大为,任华华,杨嘉丹,樊红秀,李桂杰   

  1. 吉林农业大学食品科学与工程学院
  • 收稿日期:2017-10-30 修回日期:2017-12-29 出版日期:2018-03-25 发布日期:2018-03-14
  • 通讯作者: 王大为 E-mail:xcpyfzx@163.com
  • 基金资助:
    吉林省科技发展重点科技攻关项目

Study on Preparation and Stability of Functional Grease Microcapsules

  • Received:2017-10-30 Revised:2017-12-29 Online:2018-03-25 Published:2018-03-14

摘要: 以海藻酸钠为壁材,氯化钙溶液为固化剂,功能性油脂为芯材,并以微胶囊的包埋率为检测指标,在电压2000 V,固化时间30 min,搅拌速率50 %的条件下,通过单因素试验和正交试验确定出功能性油脂微胶囊化的最佳工艺:海藻酸钠浓度1.6 %,频率620 Hz,氯化钙浓度1.5 %,进料速度4.0 mL/min,此条件下得到的微胶囊包埋率达到(88.32 ± 0.28)%。扫描电子显微镜下微胶囊呈均一球体状,表面光滑。体式显微镜下可看出微胶囊颜色淡黄色,微观结构为单核结构。傅里叶红外光谱分析显示微胶囊含有油脂的特征峰,芯材化学结构并未发生改变。热重分析法(Thermogravimetric,TG-DTA)试验结果表明微胶囊在250 ℃以下具有良好的热稳定性。加速氧化试验表明微胶囊大幅提高了芯材的抗氧化性。

关键词: 关键词:海藻酸钠, 微胶囊, 包埋率, 功能性油脂

Abstract: Sodium alginate was used as the wall material, calcium chloride solution as the curing agent, functional grease as the core material,and the embedding rate of microcapsules was used as the detection index, under the conditions of voltage 2000 V, curing time 30 min and stirring rate 50 %, through single factor test and orthogonal test determine the best technology for microencapsulation of grease: the concentration of sodium alginate was 1.6 %, the frequency was 620 Hz, the concentration of calcium chloride was 1.5 %, and the feed rate was 4.0 ml/min, the embedding rate of microcapsules was (88.32 ± 0.28) %. The microcapsules under the scanning electron microscope showed a uniform spherical shape and smooth surface. Microcapsules can be seen under the stereomicroscope was light yellow color, microstructure was the single-core structure. Fourier transform infrared spectroscopy showed that the microcapsules contained the characteristic peaks of oil and the chemical structure of the core did not change. Thermogravimetric (TG-DTA) test showed that microcapsules had good thermal stability below 250 ℃. Accelerated oxidation test demonstrated the microcapsules significantly increased the oxidation resistance of the core material.

Key words: Keywords: Sodium alginate, Microcapsules, Embedding rate, Functional grease

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