Department of Packaging, Yonsei University, Wonju 220-710, Korea.
Rattanakosin International College of Creative Entrepreneurship (RICE), Rajamangala University of Technology Rattanakosin, Nakhon Pathom 73170, Thailand.
Molecules. 2022 Apr 25;27(9):2752. doi: 10.3390/molecules27092752.
Intelligent packaging with indicators that provide information about the quality of food products can inform the consumer regarding food safety and reduce food waste. A solid material for a pH-responsive indicator was developed from hydroxypropyl methylcellulose (HPMC) composited with microcrystalline cellulose (MCC). MCC at 5%, 10%, 20%, and 30% / was introduced into the HPMC matrix and the physical, barrier, thermal, and optical properties of the HPMC/MCC bio-composite (HMB) films were analyzed. At 5, 10, and 20% MCC, improved mechanical, transparency, and barrier properties were observed, where HMB with 20% of MCC (H20MB) showed the best performance. Therefore, H20MB was selected as the biodegradable solid material for fabricating Roselle anthocyanins (RA) pH sensing indicators. The performance of the RA-H20MB indicator was evaluated by monitoring its response to ammonia vapor and tracking freshness status of chicken tenderloin. The RA-H20MB showed a clear color change with respect to ammonia exposure and quality change of chicken tenderloin; the color changed from red to magenta, purple and green, respectively. These results indicated that RA-H20MB can be used as a biodegradable pH sensing indicator to determine food quality and freshness.
智能包装具有提供食品质量信息的指标，可以让消费者了解食品安全并减少食物浪费。本研究以羟丙基甲基纤维素（HPMC）与微晶纤维素（MCC）复合，开发出一种用于 pH 响应指示剂的固体材料。将 5%、10%、20%和 30%的 MCC 分别引入 HPMC 基质中，并分析了 HPMC/MCC 生物复合材料（HMB）薄膜的物理、阻隔、热学和光学性能。在 5%、10%和 20%的 MCC 条件下，观察到机械性能、透明度和阻隔性能得到了改善，其中含有 20% MCC 的 HMB（H20MB）表现出最佳性能。因此，H20MB 被选为用于制备洛神花花青素（RA）pH 传感指示剂的可生物降解固体材料。通过监测其对氨蒸气的响应并跟踪鸡胸肉的新鲜度状态，评估了 RA-H20MB 指示剂的性能。RA-H20MB 对氨气暴露和鸡胸肉质量变化表现出明显的颜色变化，颜色分别从红色变为洋红色、紫色和绿色。这些结果表明，RA-H20MB 可用作可生物降解的 pH 传感指示剂，以确定食品质量和新鲜度。
