Abstract
Herein, a polyurethane acrylate-based TiO2 (PU-TiO2) was fabricated using a two-step method. First, a polyurethane prepolymer was prepared. Second, PU-TiO2 was prepared using amino-modified TiO2 (A-TiO2). The best synthesis process of the polyurethane prepolymer was when the reaction temperature was 80 °C, the reaction time was 3 h and the R-value of the polyurethane acrylate was 2. Next, the influence of the A-TiO2 content on the structure and performance of PU-TiO2 was examined. The analysis of the rheological properties of the PU-TiO2 ink indicated that its viscosity gradually increased as the A-TiO2 content increased. The tensile performance of film improved because of the presence of A-TiO2. The photo-polymerisation and photo-rheological performance indicated that the PU-TiO2 structure changed from a hyperbranched structure with TiO2 as the core to a segmented structure, as the A-TiO2 content was 3%.
Highlights
Blue light-curable digital inkjet printing of textiles has been proposed, and this technology has unique characteristics such as energy efficiency, simple processability, broad adaptability, safety and environmental protection [1,2,3]
The analysis of the rheological properties of the polyurethane acrylate-based TiO2 (PU-TiO2) ink indicated that its viscosity gradually increased as the amino-modified TiO2 (A-TiO2) content increased
The dispersion stability of the pigment ink could be improved to some extent with the pigment prepared by encapsulating pigment particles; the film still lacks firm forces
Summary
Blue light-curable digital inkjet printing of textiles has been proposed, and this technology has unique characteristics such as energy efficiency, simple processability, broad adaptability, safety and environmental protection [1,2,3]. Because of the inherent characteristics of pigments, such as high surface energy and low polarity, pigmentbased digital inkjet-printing inks have common defects, including the poor dispersion stability of pigment particles in the ink and easy migration and aggregation during the film-forming and film-curing processes. Based on the abovementioned limitations, encapsulating latex particles on pigment surfaces was considered the most promising method to improve the quality of pigmentbased inks [4,5]. The dispersion stability of the pigment ink could be improved to some extent with the pigment prepared by encapsulating pigment particles; the film still lacks firm forces. In our previous study [18], polyurethane acrylate-based titanium dioxide (PU-TiO2) was used to prepare blue light-curable inks as oligomers and white pigments to replace the original white pigment. We examined the optical rheological properties of the ink and the breaking strength of the cured film
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
