Gorjanc Marija, Gerl Ana, Kert Mateja
Department of Textiles, Graphic Arts and Design, Faculty of Natural Sciences and Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia.
Polymers (Basel). 2022 Jan 22;14(3):447. doi: 10.3390/polym14030447.
The development of pH-responsive textile sensors has attracted much interest in recent decades. Therefore, the aim of this study was to show that screen printing could be one of the possible techniques for development of pH-responsive textile. Several parameters that could influence the pH sensitivity and responsivity of a screen-printed textile with bromocresol green dye were studied, such as textile substrate (cotton, polyamide), printing paste composition, and type of fixation (heat and steaming). The change in mechanical and physical properties of the printed fabrics was tested according to the valid ISO, EN, or ASTM standards. The responsiveness of the printed samples to different pH values with the change in colour was evaluated spectrophotometrically. In addition, the colour fastness of the printed textiles to rubbing, washing, and light was also investigated. The results show that the textile responsiveness to pH change was successfully developed by flat screen-printing technique, which proves that the printing process could be one of the methods for the application of indicator dye to textiles. The application of the printing paste to cotton and polyamide fabrics resulted in an expected change in the mechanical and physical properties of the fabrics studied. The responsiveness of printed fabrics to the change of pH value depends on the type of fibres, the strength of dye-fibre interactions, and the wettability of the fabric with buffer solutions. The colour fastness of the printed fabrics to dry and wet rubbing is excellent. Printed polyamide fabric is more resistant to washing than printed cotton fabric. Both printed fabrics have poor colour fastness to light.
近几十年来，pH响应型纺织传感器的发展引起了广泛关注。因此，本研究的目的是表明丝网印刷可能是开发pH响应型纺织品的可行技术之一。研究了几个可能影响带有溴甲酚绿染料的丝网印刷纺织品的pH敏感性和响应性的参数，如纺织基材（棉、聚酰胺）、印花糊料组成和固着类型（加热和汽蒸）。根据有效的ISO、EN或ASTM标准测试了印花织物的机械和物理性能变化。用分光光度法评估了印花样品对不同pH值的颜色变化响应。此外，还研究了印花纺织品的耐摩擦色牢度、耐洗色牢度和耐光色牢度。结果表明，通过平版丝网印刷技术成功开发了纺织品对pH变化的响应性，这证明了印花工艺可能是将指示剂染料应用于纺织品的方法之一。将印花糊料应用于棉和聚酰胺织物会导致所研究织物的机械和物理性能发生预期变化。印花织物对pH值变化的响应性取决于纤维类型、染料与纤维相互作用的强度以及织物在缓冲溶液中的润湿性。印花织物的耐干摩擦和湿摩擦色牢度极佳。印花聚酰胺织物比印花棉织物更耐洗涤。两种印花织物的耐光色牢度都很差。
