Leite Liliana, Pais Vânia, Bessa João, Cunha Fernando, Relvas Cátia, Ferreira Noel, Fangueiro Raul
Fibrenamics-Institute of Innovation on Fiber-Based Materials and Composites, University of Minho, 4800-058 Guimarães, Portugal.
Centre for Textile Science and Technology (2C2T), University of Minho, 4800-058 Guimarães, Portugal.
Polymers (Basel). 2023 Feb 10;15(4):872. doi: 10.3390/polym15040872.
Biological hazards can be defined as substances that endanger the life of any living organism, most notably humans, and are often referred to as biohazards. Along with the use of personal protective equipment (PPE), early detection of contact is essential for the correct management and resolution of a biological threat, as well as lower mortality rates of those exposed. Herein, Prussian blue (PB) was evaluated as a functional compound applied on polyester knits to act as an on-site sensor for bacteria detection. In order to study the best compound concentration for the intended application, polymeric solutions of 0.5, 1 and 2 g/L were developed. The three conditions tested displayed high abrasion resistance (>2000 cycles). The bacterial sensing capacity of the coated knits was assessed in liquid and solid medium, with the functionalised substrates exhibiting the capability of detecting both Gram-positive and Gram-negative bacteria and changing colours from blue to white. Evaluation of water repellence and chemical penetration resistance and repellence was also performed in polyester functionalised with PB 0.5 and 1 g/L. Both knits showed a hydrophobic behaviour and a capacity to resist to penetration of chemicals and level 3 repellence effect for both acid and base chemicals.
生物危害可定义为危及任何生物体（最显著的是人类）生命的物质，通常被称为生物危险物。除了使用个人防护装备（PPE）外，早期发现接触情况对于正确管理和解决生物威胁以及降低接触者的死亡率至关重要。在此，普鲁士蓝（PB）被评估为一种应用于聚酯针织物上的功能性化合物，用作细菌检测的现场传感器。为了研究预期应用的最佳化合物浓度，制备了0.5、1和2 g/L的聚合物溶液。测试的三种条件显示出高耐磨性（>2000次循环）。在液体和固体培养基中评估了涂层针织物的细菌传感能力，功能化底物表现出检测革兰氏阳性菌和革兰氏阴性菌的能力，并从蓝色变为白色。还对用0.5和1 g/L PB功能化的聚酯进行了拒水性、耐化学物质渗透性和拒斥性评估。两种针织物均表现出疏水行为，并且具有抵抗化学物质渗透的能力以及对酸性和碱性化学物质的3级拒斥效果。
