Details

Autor(en) / Beteiligte

• Balagna, Cristina
• Irfan, Muhammad
• Perero, Sergio
• Miola, Marta
• Maina, Giovanni
• Santella, Daniela
• Simone, Antonia

Titel

Characterization of antibacterial silver nanocluster/silica composite coating on high performance Kevlar® textile

Ist Teil von

• Surface & coatings technology, 2017-07, Vol.321, p.438-447

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• High performance textiles such as Kevlar® find large use in many applications including aerospace field, thus require antimicrobial characteristics to avoid the risk of microbial contamination on board of spacecraft and orbital station during prolonged space exploration missions. In this study, Kevlar® fabric has been coated with antibacterial silver nanocluster/silica composite layer with different thicknesses, by means of radio frequency co-sputtering technique. The fibers morphology and composition has been analyzed by means of field emission scanning election microscopy (FESEM), energy dispersion spectrometry (EDS), x-ray photoelectron spectroscopy (XPS). Thermal properties have been evaluated through thermogravimetric experiments (TGA) and differential scanning calorimetry (DSC). The fibers result homogenously coated with the antibacterial layer composed of silica matrix embedding silver nanoclusters. A controlled and gradual release of silver was observed in silver leaching tests in water and artificial sweat. The antimicrobial behavior is verified through inhibition halo and broth dilution tests against different bacterial and fungal species. The in vitro skin penetration test shows that the Ag amount absorbed through the skin is mainly stored in epidermis. Tensile and tear properties were maintained and not degraded by the coating deposition. The reduction of perforation resistance after coating deposition could be considered negligible whereas abrasion test demonstrated an increased resistance of coated sample. •Silver nanocluster silica composite coating was deposited on Kevlar® textile•A co-sputtering technique was used for the coating deposition•The antimicrobial behavior of the coating was demonstrated•The silver release in water and artificial sweat results very low•Mechanical properties are not significantly influenced by the antibacterial coating