Prussian blue sensor for bacteria detection in personal protection clothing

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...

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Bibliographic Details
Published in:Polymers 2023-02, Vol.15 (4), p.1-14
Main Authors: Leite, Liliana, Pais, Vânia Nascimento, Bessa, João, Cunha, Fernando, Relvas, Cátia, Ferreira, Noel, Fangueiro, Raúl
Format: Article
Language:English
Subjects:
Bacteria
Bacterial sensor
Defence materials
Health aspects
Iron compounds
Personal protective equipment
Prussian blue
Safety equipment
Science & Technology
Sensors
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Summary: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. The authors would like to express appreciation for the support of the sponsors of the individual project n° POCI-01-0247-FEDER-045240 entitled “Vestuário de proteção ativa contra agentes químicos e biológicos com base em nanotecnologia”.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym15040872