文章摘要
杨瑞婷,周游,李萌婷,朱莉,尹学琼,王江.氧指示剂在香料微胶囊壁材筛选中的应用[J].精细化工,2020,37(11):
氧指示剂在香料微胶囊壁材筛选中的应用
Application of oxygen indicator in the selection of wall material for spice microcapsule
投稿时间:2020-05-22  修订日期:2020-07-16
DOI:
中文关键词: 微胶囊壁材  筛选  氧指示剂  屏氧  香料微胶囊
英文关键词: microcapsule wall material  selection  oxygen indicator  oxygen blocking  spice microcapsule
基金项目:国家自然科学基金项目;海南大学科研平台建设项目;2019年海南省普通高等学校研究生创新科研课题
作者单位E-mail
杨瑞婷 海南大学海南省精细化工工程技术研究中心 527156758@qq.com 
周游 海南大学海南省精细化工工程技术研究中心  
李萌婷 海南大学海南省精细化工工程技术研究中心  
朱莉 海南大学海南省精细化工工程技术研究中心  
尹学琼 海南大学海南省精细化工工程技术研究中心 yxq@hainu.edu.cn 
王江 海口市绿色催化与反应工程重点实验室  
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中文摘要:
      以海藻酸钠(SA)、甲基纤维素(MC)、羧甲基壳聚糖(CMC)作为微胶囊壁材,亚甲基蓝(MB)/TiO2/甘油(Gly)作为氧指示剂,制备了6种微胶囊氧指示剂复合薄膜。根据氧指示剂复合薄膜激活、回色以及重复利用性筛选合适的屏氧壁材体系。当MC的质量浓度为20 g/L,MB、TiO2、Gly用量分别为0.05 g、1 g和0.5 mL时,MB/TiO2/Gly/MC氧指示剂复合薄膜光催化激活效率最佳。在空气湿度为75%、温度为35 ℃条件下,MC/SA/MC和MC/CMC/SA氧指示剂复合薄膜在10 h的回色率分别为28.7%和27.9%,且回色时变化较均匀;重复使用3次,MC/SA/MC和MC/CMC/SA氧指示剂复合薄膜的回色率仅分别下降了0.8%和1.0%,说明这两种壁材体系是屏氧良好的香料壁材。将这两种壁材体系通过喷雾干燥法包埋玫瑰精油芯材制备香料微胶囊,存放7 d后,包埋在MC/CMC/SA中的芯材有新物质出现而MC/SA/MC中无新物质,说明MC/SA/MC体系对精油有更好的保护作用。
英文摘要:
      Six kinds of microcapsule oxygen-indicating composite films were prepared with sodium alginate (SA), methyl cellulose (MC), carboxymethyl chitosan (CMC) as microcapsule wall materials and methylene blue (MB)/TiO2/glycerin (Gly) as oxygen indicator. The suitable screen oxygen wall material system was selected according to the activation, color reversal and reusability of the oxygen-indicating composite films. When the concentration of MC was 20 g/L, and the dosage of MB, TiO2 and Gly was 0.05 g, 1 g and 0.5 mL, respectively, the photocatalytic activation efficiency of MB/TiO2/Gly/MC oxygen-indicating composite film was the best. Under the conditions of air humidity of 75% and temperature of 35 ℃, the color recovery rate of MC/SA/MC and MC/CMC/SA oxygen-indicating composite films at 10 hours was 28.7% and 27.9% respectively, and the color changing was relatively uniform. After repeated use for 3 times, the color recovery rate of MC/SA/MC and MC/CMC/SA oxygen-indicating composite films decreased by only 0.8% and 1.0% respectively, indicating that these two wall material systems are spice wall material with good screen oxygen. These two wall material systems were used to embed rose essential oil by spray drying to prepare spice microcapsules. After 7 days of storage, new substances appeared in the core material embedded in MC/CMC/SA, while no new substances appeared in MC/SA/MC, indicating that the MC/SA/MC system had a better protection effect on rose oil.
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