Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
CQE, Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
Molecules. 2019 May 16;24(10):1891. doi: 10.3390/molecules24101891.
Daylight bactericidal cotton (100% cotton) textiles are presented and proposed for future hospital use. Amorphous titania (a-TiO) and amorphous titania/chitosan complexes (a-TiO//CS) were the selected bactericidal agents. Nanoparticles (NPs) and films were the two paths designed. Cotton textiles were impregnated with a-TiO-based NPs or coated with a-TiO 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-TiO-based NPs. Amorphous-TiO 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-TiO NPs, films, and impregnated/coated textiles was proven according to AATCC 100 and ASTM E2149, using (ATCC6538) as the bacterial indicator strain. A bacterial reduction of 99.97% was achieved for the a-TiO films and of 99.97% for the a-TiO/CS NPs. Regarding the impregnated textiles, a bacterial reduction of 91.66% was achieved with a-TiO/CS NPs, and 99.97% for cotton textiles coated with an a-TiO film.
daylight 杀菌棉（100%棉）纺织品被提出并建议用于未来的医院使用。无定形二氧化钛（a-TiO）和无定形二氧化钛/壳聚糖复合物（a-TiO//CS）被选为杀菌剂。纳米颗粒（NPs）和薄膜是设计的两种途径。棉纺织品用基于 a-TiO 的 NPs 进行浸渍或用 a-TiO 薄膜进行涂层。工业浸渍/涂层将在纺织品整理处理期间实施。建立了一种新颖的（室温且碱性催化）、绿色的（水作为催化剂的水热）、节省时间和易于放大的溶胶-凝胶工艺，以生产基于 a-TiO 的 NPs。无定形 TiO 薄膜通过浸涂（酸催化）溶胶-凝胶溶液来生产。根据 AATCC 100 和 ASTM E2149，使用 （ATCC6538）作为细菌指示菌株，证明了 a-TiO NPs、薄膜和浸渍/涂层纺织品的日光杀菌性能（无需外部紫外线光源）。a-TiO 薄膜的细菌减少率达到 99.97%，a-TiO/CS NPs 的细菌减少率达到 99.97%。对于浸渍的纺织品，a-TiO/CS NPs 的细菌减少率达到 91.66%，而涂有 a-TiO 薄膜的棉纺织品的细菌减少率达到 99.97%。
