Daylight Bactericidal Titania Textiles: A Contribution to Nosocomial Infections Control

Molecules

Cláudia Oliveira¹  M. Clara Gonçalves²  JoanaC. Matos² 

[1] Departamento de Biologia, CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal;Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;

关键词: nanoparticles;    amorphous titania;    chitosan;    bactericidal;    ASTM E2149;    AATCC 100;    Staphylococcus aureus;   

DOI  :  10.3390/molecules24101891

来源: DOAJ

【 摘 要 】

: Daylight bactericidal cotton (100% cotton) textiles are presented and proposed for future hospital use. Amorphous titania (a-TiO₂) and amorphous titania/chitosan complexes (a-TiO₂//CS) were the selected bactericidal agents. Nanoparticles (NPs) and films were the two paths designed. Cotton textiles were impregnated with a-TiO₂-based NPs or coated with a-TiO₂ films. Industrial impregnation/coating will be implemented during the textile finishing treatments. A novel (room temperature and base-catalyzed), green (hydrothermal water as a catalyst), time-saving, and easy scale-up sol–gel process was established to produce the a-TiO₂-based NPs. Amorphous-TiO₂ films were produced by a dip-in (acid catalyzed) sol–gel solution. The daylight bactericidal performance (without the need of an external ultraviolet light source) of a-TiO₂ NPs, films, and impregnated/coated textiles was proven according to AATCC 100 and ASTM E2149, using Staphylococcus aureus (ATCC^®6538^TM) as the bacterial indicator strain. A bacterial reduction of 99.97% was achieved for the a-TiO₂ films and of 99.97% for the a-TiO₂/CS NPs. Regarding the impregnated textiles, a bacterial reduction of 91.66% was achieved with a-TiO₂/CS NPs, and 99.97% for cotton textiles coated with an a-TiO₂ film.

【 授权许可】

Unknown