Alamán Jorge, López-Valdeolivas María, Alicante Raquel, Peña Jose Ignacio, Sánchez-Somolinos Carlos
Departamento de Física de la Materia Condensada, Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain.
BSH Electrodomésticos España, S.A., Polígono Industrial de PLA-ZA, Ronda del Canal Imperial de Aragón, 18-20, 50197 Zaragoza, Spain.
Polymers (Basel). 2019 Mar 6;11(3):430. doi: 10.3390/polym11030430.
Accurate positioning of luminescent materials at the microscale is essential for the further development of diverse application fields including optoelectronics, energy, biotechnology and anti-counterfeiting. In this respect, inkjet printing has recently attracted great interest due to its ability to precisely deposit with high throughput and no contact, functional materials on different types of substrates. Here, we present a novel photoacid catalysed organic-inorganic hybrid luminescent ink. The formulation, containing monomers bearing epoxy and silane functionalities, a photoacid generator and a small percentage of Rhodamine-B, shows good jetting properties and adequate wetting of the deposited droplets on the receiving substrates. Ultraviolet exposure of the deposited material triggers the cationic ring-opening polymerization reaction of the epoxy groups. Concomitantly, if atmospheric water is available, hydrolysis and condensation takes place, overall leading to a luminescent crosslinked hybrid organic-inorganic polymeric material obtained through a simple one-step curing process, without post baking steps. Advantageously, protection of the ink from actinic light delays the hydrolysis and condensation conferring long-term stability to the ink. Digital patterning leads to patterned emissive surfaces and elements with good adhesion to different substrates, mechanical and optical properties for the fabrication of optical and photonic elements and devices.
在微尺度上精确放置发光材料对于包括光电子学、能源、生物技术和防伪在内的各种应用领域的进一步发展至关重要。在这方面，喷墨印刷最近引起了极大的兴趣，因为它能够以高通量和无接触的方式将功能材料精确地沉积在不同类型的基板上。在此，我们展示了一种新型的光酸催化有机-无机杂化发光墨水。该配方包含带有环氧和硅烷官能团的单体、光酸产生剂和少量罗丹明-B，表现出良好的喷射性能以及沉积液滴在接收基板上的充分润湿性。对沉积材料进行紫外线照射会引发环氧基团的阳离子开环聚合反应。同时，如果有大气中的水，水解和缩合就会发生，总体上通过简单的一步固化过程就能得到一种发光的交联杂化有机-无机聚合物材料，无需后烘焙步骤。有利的是，将墨水避光可延迟水解和缩合，赋予墨水长期稳定性。数字图案化可形成图案化的发光表面和元件，这些元件与不同基板具有良好的附着力、机械和光学性能，可用于制造光学和光子元件及器件。
