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Effect of nanocomposite‐based packaging on preservation quality of green tea
Author(s) -
Zhao Liyan,
Li Feng,
Chen Guitang,
Fang Yong,
An Xinxin,
Zheng Yonghua,
Xin Zhihong,
Zhang Min,
Yang Yanting,
Hu Qiuhui
Publication year - 2012
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/j.1365-2621.2011.02879.x
Subject(s) - nanocomposite , polyethylene , ascorbic acid , green tea , food science , food packaging , moisture , materials science , polyphenol , chemistry , composite material , organic chemistry , antioxidant
Summary An improved nanocomposite‐based packaging material (NCP) was prepared by blending polyethylene with nano‐Ag, nano‐TiO 2 and attapulgite. And its effect on preservation quality of green tea (Biluochun and Qingfeng) during one‐year ambient storage was investigated. The results showed that adding nanoparticles to the polyethylene could significantly improve the barrier property. After one‐year ambient storage, the moisture of Biluochun and Qingfeng with NCP was decreased by 10.3% and 6.1% compared with the normal packaging material. Meanwhile, the contents of amino acid, tea polyphenols, chlorophyll and ascorbic acid were increased by 22.8%, 9.4%, 30.4% and 9.5% for Biluochun and 19.2%, 9.3%, 27.3% and 21.6% for Qingfeng, respectively, compared with the normal packaging material. Moreover, the sensory quality of NCP was also superior to that with the control. Therefore, the improved NCP material probably provides an attractive alternative to maintain the preservation quality of green tea at a high level during storage.