The Petroleum and Petrochemical College, Chulalongkorn University, Soi Chula 12, Phyathai Road, Pathumwan, Bangkok, 10330, Thailand; Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok, 10330, Thailand.
The Petroleum and Petrochemical College, Chulalongkorn University, Soi Chula 12, Phyathai Road, Pathumwan, Bangkok, 10330, Thailand; Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok, 10330, Thailand.
Carbohydr Polym. 2021 Feb 15;254:117442. doi: 10.1016/j.carbpol.2020.117442. Epub 2020 Nov 25.
Hybrid nanocomposite thin film for hydrogen sulfide (HS) gas sensor based on bacterial cellulose nanocrystals (BCNCs) has resulted in high demand of environmentally friendly nanomaterials. Films were prepared using thermal spray coating that sprayed hybrid nanocomposite suspension based on silver nanoparticles (AgNPs)-loaded BCNCs's surface and alginate-molybdenum trioxide (MoONPs) onto PET substratum. In this study, a novel food package label characterized as HS gas sensor for meat spoilage is based on an optically transparent coated film with thickness ranging from 0.73 to 2.18 μm. Sensor characteristics with different suspension concentrations and various HS gas concentrations were evaluated. The highest sensitivity to HS with the limit of detection (LOD) (3.27 ppm) and the limit of quantification (LOQ) (10.94 ppm) was exhibited in 1%w/v suspension. Label prototypes which respond as visible color changes through naked-eye to HS gas released during meat spoilage, monitored at 4 °C and varying storage times were conducted.
基于细菌纤维素纳米晶体（BCNC）的用于硫化氢（HS）气体传感器的混合纳米复合材料薄膜，对环保型纳米材料的需求很高。使用热喷涂涂层制备了薄膜，该涂层将基于载银纳米颗粒（AgNPs）的BCNC 表面的混合纳米复合材料悬浮液和藻酸盐-三氧化钼（MoONPs）喷涂到 PET 基底上。在这项研究中，一种新型食品包装标签，作为基于具有从 0.73 到 2.18μm 厚度的光学透明涂层的 HS 气体传感器，用于肉类腐败。评估了不同悬浮液浓度和各种 HS 气体浓度下的传感器特性。在 1%w/v 悬浮液中表现出对 HS 的最高灵敏度，其检测限（LOD）（3.27ppm）和定量限（LOQ）（10.94ppm）。通过裸眼监测在 4°C 和不同储存时间下释放的 HS 气体，对响应可见颜色变化的标签原型进行了测试。
