Chemical Industry and Engineering Progress ›› 2023, Vol. 42 ›› Issue (5): 2626-2637.DOI: 10.16085/j.issn.1000-6613.2022-1347

• Fine chemicals • Previous Articles     Next Articles

Preparation of mandarin oil microcapsules and its product quality evaluation

SUN Yanchenhao(), WANG Wei(), LI Yizhe, ZHU Yanni, LIU Xuewu, ZHANG Dawei   

  1. School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
  • Received:2022-07-18 Revised:2022-09-21 Online:2023-06-02 Published:2023-05-10
  • Contact: WANG Wei

橘皮油微胶囊制备及其产品质量评价

孙闫晨昊(), 王维(), 李一喆, 祝妍妮, 刘学武, 张大为   

  1. 大连理工大学化工学院,辽宁 大连 116024
  • 通讯作者: 王维
  • 作者简介:孙闫晨昊(1997—),男,硕士研究生,研究方向为喷雾干燥。E-mail:sych808@mail.dlut.edu.cn
  • 基金资助:
    国家自然科学基金(21676042);辽宁省自然科学基金(201602167)

Abstract:

Mandarin oil is characterized by easy volatilization and oxidization, which is difficult for long-term storage. Spray drying and freeze-drying methods were adopted in this work to encapsulate the mandarin oil in order to prolong its shelf life and enrich its application scope. Microcapsules qualities, such as encapsulation efficiency and product microstructure, were evaluated. Optimal operating conditions of spray drying were air inlet temperature 194˚C, feed flow rate 90.2mL/min, and feed solid content 34.7%. Operating conditions of freeze-drying were freezing temperature -30˚C, chamber pressure 30Pa, and radiation temperature 30˚C. Encapsulation efficiencies of products prepared by spray drying and freeze-drying were 90.17% and 82.48%, respectively, under the present conditions. The products by spray drying were fine and sphere-like with dense microcapsule walls, while the products by freeze-drying were irregular and platelet-shaped but with lower moisture content and better fluidity. Both products exhibited certain heat resistances, which could reduce the heat-induced loss of core materials in storage and application. In general, the spray drying method was more suitable than the freeze-drying method for the preparation of mandarin oil microcapsules.

Key words: spray drying, freeze-drying, mandarin oil, microcapsule, quality evaluation

摘要:

橘皮油的易挥发、易氧化等特点使其难以长期保存。为了延长橘皮油的保质期并丰富其应用范围,本文利用微胶囊技术,以麦芽糊精和阿拉伯胶为复配壁材,分别采用喷雾干燥法和冷冻干燥法对橘皮油进行包埋,并对所得产品进行质量评价。喷雾干燥的最佳工艺参数为:进风温度194℃、进料速度90.2mL/min和料液固含量34.7%。冷冻干燥的工艺参数为冷冻温度-30℃、干燥室压力30Pa和干燥室温度30℃。在此工艺条件下,喷雾干燥法和冷冻干燥法制备的橘皮油微胶囊包埋率分别为90.17%和82.48%。喷雾干燥产品呈规则球形、质感细腻并且囊壁致密,而冷冻干燥产品呈不规则的薄片状,但水分含量较低并且流动性好。2种干燥产品都具有一定的耐热能力,可以减少芯材在贮存和使用过程中的受热损失。综合比较,喷雾干燥法比冷冻干燥法更适合应用于制备橘皮油微胶囊产品。

关键词: 喷雾干燥, 冷冻干燥, 橘皮油, 微胶囊, 质量评价

CLC Number: 

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