Information Technology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; Key Laboratory of Cold Chain Logistics Technology for Agro-product, Ministry of Agriculture and Rural Affairs, Beijing 100097, China; National Engineering Research Center for Information Technology in Agriculture, Beijing Academy of Agri-cultural and Forestry Sciences, Beijing 100097, China; National Engineering Laboratory for Agri-product Quality Traceability, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China.
School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255049, Shandong Province, China; Information Technology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
Int J Biol Macromol. 2022 Nov 30;221:183-192. doi: 10.1016/j.ijbiomac.2022.08.205. Epub 2022 Sep 5.
An intelligent colorimetric film was developed for the quality detection of tilapia fillets using bacterial cellulose (BC) as a substrate in combination with pelargonidin (Pg), cyanidin (Cy), and delphinium (Dp). The color of the BC-Pg-Cy-Dp film and Pg-Cy-Dp solution changed from rosy to blue-violet at pH 3-10. The mechanical and antioxidant properties of the film were improved after the addition of Pg-Cy-Dp. Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) showed that a new hydrogen bond might be formed between the cellulose chain and the anthocyanin molecule, which increased the density of the film. The BC-Pg-Cy-Dp film displayed a large color difference from rosy to blue-violet when applied to tilapia fillet storage. The changes of K values indicated a good linear relationship with the change in ∆E at 4 °C and 25 °C. In the actual cold chain, the color of the film changed from rosy to purple, which could be identified by the naked eye and indicated that the fish were in the first fresh stage. Thus, the BC-Pg-Cy-Dp film can be used as an intelligent packaging film during storage to monitor the freshness of fish by the naked eye.
一种智能比色膜被开发用于罗非鱼片的质量检测，该比色膜以细菌纤维素 (BC) 为基质，结合矢车菊素 (Pg)、花青素 (Cy) 和飞燕草素 (Dp)。BC-Pg-Cy-Dp 膜和 Pg-Cy-Dp 溶液的颜色在 pH 3-10 范围内从玫瑰红变为蓝紫色。添加 Pg-Cy-Dp 后，膜的机械和抗氧化性能得到改善。傅里叶变换红外 (FTIR) 光谱和扫描电子显微镜 (SEM) 表明，纤维素链和花色苷分子之间可能形成了新的氢键，从而增加了膜的密度。BC-Pg-Cy-Dp 膜应用于罗非鱼片贮藏时，从玫瑰红到蓝紫色的色差较大。K 值的变化与 4°C 和 25°C 时 ∆E 的变化呈良好的线性关系。在实际冷链中，膜的颜色从玫瑰红变为紫色，可以通过肉眼识别，表明鱼处于第一新鲜阶段。因此，BC-Pg-Cy-Dp 膜可以用作储存过程中的智能包装膜，通过肉眼监测鱼的新鲜度。
