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食品与发酵工业  2018, Vol. 44 Issue (9): 84-90    DOI: 10.13995/j.cnki.11-1802/ts.016192
  研究报告 本期目录 | 过刊浏览 | 高级检索 |
Silicalite-1/PDMS杂化膜对红茶特征挥发性芳香物的分离性能
张婧涵1, 倪芳1, 于俊雅1, 姚忠1*, 邵增琅2, 孙芸1, 朱本伟1, 钟亮2
1(南京工业大学 食品与轻工学院,江苏 南京,211800)
2(南京融点食品科技有限公司,江苏 南京,211300)
Preparation of Silicalite-1/PDMS membrane and its application in separating characteristic aroma in black tea
ZHANG Jing-han1, NI Fang1, YU Jun-ya1, YAO Zhong1*, SHAO Zeng-lang2, SUN Yun1, ZHU Ben-wei1, ZHONG Liang2
1(College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211800, China)
2(Nanjing Apogee Food Technology Co. Ltd, Nanjing 211300, China)
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摘要 将纳米有机硅Silicalite-1添加到聚二甲基硅氧烷(polydimethylsiloxane,PDMS)中制备出Silicalite-1/PDMS杂化膜,用于红茶中挥发性芳香物的渗透汽化分离。在乙醇-水体系中的研究显示,添加Silicalite-1会引起乙醇通量的下降,但对分离因子有明显改善。考察了Silicalite-1/PDMS杂化膜对水杨酸甲酯、芳樟醇和苯甲醛等3种红茶特征性芳香物的渗透汽化分离性能,结果表明,Silicalite-1/PDMS杂化膜(Silicalite-1质量分数为5%)对3种化合物的渗透通量和分离因子均较PDMS/PVDF膜有明显改善,在温度50 ℃、流速0.32 L/min条件下分离5 h,水杨酸甲酯、芳樟醇和苯甲醛的渗透通量分别较PDMS/PVDF膜提高了50.50%、176.10%和197.90%,分离因子提高了23.50%、17.80%和62.70%。测试了Silicalite-1/PDMS杂化膜对实际茶汤中挥发性芳香物的分离富集效果,在50 ℃、循环流速0.32 L/min的条件下连续分离5 h,茶汤中水杨酸甲酯、苯甲醛和芳樟醇的回收率分别为96.67%、86.42%和84.91%,应用效果良好。
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张婧涵
倪芳
于俊雅
姚忠
邵增琅
孙芸
朱本伟
钟亮
关键词:    渗透汽化  分离  挥发性芳香物  红茶    
Abstract: Silicalite-1 filled polydimethylsiloxane (PDMS) membranes (Silicalite-1/PDMS) were prepared by coating method, and used for separating volatile aromatic compounds from black tea by pervaporation (PV). The pervaporation performance of Silicalite-1/PDMS membrane was investigated in ethanol-water system. The results showed that Silicalite-1 could decrease ethanol flux, while improved separation remarkably. Silicalite-1/PDMS membrane was then applied in pervaporation separation of methyl salicylate, linalool and benzaldehyde, which are characteristic aroma components in black tea. The results showed that Silicalite-1/PDMS hybrid membrane which contained 5% (mass) Silicalite-1 displayed significant improvement in permeable flux and separation factor than PDMS/PVDF membrane. When using Silicalite-1/PDMS membrane to replace PDMS/PVDF membrane for separation at 50 ℃ and the flow rate of 0.32 L/min for 5 h, the flux of methyl salicylate, linalool and benzaldehyde increased by 50.50%, 176.10% and 197.90% respectively, and the separation factor increased by 23.50%, 17.80% and 62.70%, respectively. In addition, the performance of Silicalite-1/PDMS membrane in separating and enriching volatile aroma components in actual black tea was tested. When the experiment was conducted at 50 °C and the flow rate was 0.32 L/min for 5 h, the recovery rates of methyl salicylate, benzaldehyde and linalool were 96.67%, 86.42% and 84.91% respectively. The result showed that Silicalite-1/PDMS membrane had a better performance.
Key words:  membranes    pervaporation    separation    volatile aromatic compounds    black tea
收稿日期:  2017-11-02                出版日期:  2018-09-25      发布日期:  2018-05-25      期的出版日期:  2018-09-25
基金资助: 国家自然科学基金(21776137);南京市科技支撑计划项目(201608075)
作者简介:  硕士研究生(姚忠教授为通讯作者,E-mail:yaozhong@njtech.edu.cn)。
引用本文:    
张婧涵,倪芳,于俊雅,等. Silicalite-1/PDMS杂化膜对红茶特征挥发性芳香物的分离性能[J]. 食品与发酵工业, 2018, 44(9): 84-90.
ZHANG Jing-han,NI Fang,YU Jun-ya,et al. Preparation of Silicalite-1/PDMS membrane and its application in separating characteristic aroma in black tea[J]. Food and Fermentation Industries, 2018, 44(9): 84-90.
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http://sf1970.cnif.cn/CN/10.13995/j.cnki.11-1802/ts.016192  或          http://sf1970.cnif.cn/CN/Y2018/V44/I9/84
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