标题：Electrochemical writing on edible polysaccharide films for intelligent food packaging
作者： Wu, S (Wu, Si); Wang, WQ (Wang, Wenqi); Yan, K (Yan, Kun); Ding, FY (Ding, Fuyuan); Shi, XW (Shi, Xiaowen); Deng, HB (Deng, Hongbing); Du, YM (Du, Yumin)
来源出版物：CARBOHYDRATE POLYMERS 卷：186 页码: 236-242 DOI：10.1016/j.carbpol.2018.01.058 出版年： APR 15 2018
摘要：Polysaccharide films used as intelligent food packaging possess the advantages of renewability, safety and biodegradability. Printing on the polysaccharidic food packaging is challenging due to the high demand for edible-ink and the need for a suitable printing technique. In this work, we propose an electrochemical method for writing on polysaccharide film. Unlike conventional printing, this electrochemical writing process relies on the pH responsive color change of anthocyanin embedded in the chitosan/agarose hydrogel. By biasing a negative potential to a stainless wire (used as a pen) contacting the surface of the chitosan/agarose/ATH hydrogel, the locally generated pH change induced the color change of ATH and wrote programmed information on the hydrogel. We demonstrate the writing can be temporary in the hydrogel but stable when the hydrogel is dried. We further demonstrate that the written film is applicable for the detection of the spoilage of crucian fish. The reported electrochemical writing process provides a novel method for printing information on polysaccharide film and great potential for intelligent food packaging.
作者关键词：Chitosan; Agarose; Anthocyanin; Electrochemical writing; Food packaging
扩展关键词： OLERACEAE RED CABBAGE; PH INDICATOR; SWEET-POTATO; SHELF-LIFE; CHITOSAN; ANTHOCYANINS; EXTRACT; STRAWBERRY; STARCH
通讯作者地址：Shi, XW (reprint author), Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Hubei, Peoples R China.
地址：[Wu, Si; Wang, Wenqi; Yan, Kun; Ding, Fuyuan; Shi, Xiaowen; Deng, Hongbing; Du, Yumin] Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Hubei, Peoples R China.
