Characterization and optimization of an inkjet-printed smart textile UV-sensor cured with UV-LED light

17th World Textile Conference AUTEX 2017 - Shaping the Future of Textiles

Seipel, S.^1 ; Yu, J.^1 ; Periyasamy, A.P.^2 ; Viková, M.^2 ; Vik, M.^2 ; Nierstrasz, V.A.^1

University of Borås, Faculty of Textiles, Engineering and Business, Department of Textile Technology, Textile Materials Technology Group, Borås

501 90, Sweden^1

Technical University of Liberec, Faculty of Textile Engineering, Department of Material Engineering, Studentská 2, Liberec

461 17, Czech Republic^2

关键词: Digital ink jet printing;    Economic production;    Integrated production;    Photoactive compounds;    Polymer cross-linking;    Production process;    Resource-efficient;    Textile production;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/254/7/072023/pdf
DOI  :  10.1088/1757-899X/254/7/072023

来源: IOP

【 摘 要 】

For the development of niche products like smart textiles and other functional high-end products, resource-saving production processes are needed. Niche products only require small batches, which makes their production with traditional textile production techniques time-consuming and costly. To achieve a profitable production, as well as to further foster innovation, flexible and integrated production techniques are a requirement. Both digital inkjet printing and UV-light curing contribute to a flexible, resource-efficient, energy-saving and therewith economic production of smart textiles. In this article, a smart textile UV-sensor is printed using a piezoelectric drop-on-demand printhead and cured with a UV-LED lamp. The UVcurable ink system is based on free radical polymerization and the integrated UVsensing material is a photochromic dye, Reversacol Ruby Red. The combination of two photoactive compounds, for which UV-light is both the curer and the activator, challenges two processes: polymer crosslinking of the resin and color performance of the photochromic dye. Differential scanning calorimetry (DSC) is used to characterize the curing efficiency of the prints. Color measurements are made to determine the influence of degree of polymer crosslinking on the developed color intensities, as well as coloration and decoloration rates of the photochromic prints. Optimized functionality of the textile UV-sensor is found using different belt speeds and lamp intensities during the curing process.