纳米复合材料
材料科学
瓜尔胶
食品包装
相对湿度
生物复合材料
海藻酸钠
湿度
复合材料
生物高聚物
化学工程
纳米技术
聚合物
钠
化学
复合数
食品科学
物理
工程类
热力学
冶金
作者
Sazzadur Rahman,Devasish Chowdhury
标识
DOI:10.1016/j.ijbiomac.2022.07.008
摘要
Perishable packed foods are easily damaged by the change in relative humidity. In this work, we demonstrate that guar gum- sodium alginate blending with glucose-glycerol carbon dots nanocomposite film can be used to detect relative humidity. The fabricated nanocomposite film was an excellent smart sensor based on the fluorescence 'on-off' mechanisms against humidity. The study demonstrates that at different relative humidity conditions, such as 11 %, 33 %, 75.30 %, 84 %, and 97 %, there is a change in the fluorescence of biocomposite films under UV light. The practical feasibility of the biocomposite developed film was tested in real conditions by placing a piece of bread with high humidity conditions wrapped with the developed nanocomposite film. It was observed that under such conditions, marked quenching of fluorescence was observed and hence detection of humidity was possible. Hence, the fabricated nanocomposite film can monitor the packed food freshness using just a UV light source. Such biopolymer nanocomposite is potential materials and may find application as smart packaging materials, especially as food packaging materials.
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