Photo-curable suspensions are important materials for shaping complex-structured ceramic and glass components. However, most systems undergo slow debinding and sintering so to avoid structural collapse by rapid gas generation from polymers. Here, we propose a new strategy to fabricate interparticle photo-cross-linkable suspensions for rapid three-dimensional structuring with short debinding and sintering times. SiO₂ particles modified with polyethyleneimine complexed with oleic acid (PEI-OA) are dispersed into a refractive-index-tuned solvent, where a photo-radical initiator and a lower-than-typical amount of multifunctional acrylates (MAs) were dissolved. The SiO₂ suspension is cured by the photo-radical polymerization of MA and the Michael additive reaction between polymerized MA and amino groups of PEI-OA on SiO₂ particles. These photo-curable suspensions can be employed in various shaping processes, from micro-scale stereolithography to centimeter-scale silicone molding. The SiO₂ green compacts with complex structures are also debinded and sintered into transparent glass components by rapid heating.

光固化悬浮液是用于成型复杂结构的陶瓷和玻璃组件的重要材料。然而，大多数系统经历缓慢的脱脂和烧结，从而避免了由于从聚合物中快速产生气体而导致的结构崩溃。在这里，我们提出了一种新的策略来制造具有短脱脂和烧结时间的快速三维结构化的粒子间光可交联悬浮液。将聚乙烯亚胺与油酸（PEI-OA）络合改性的SiO ₂颗粒分散到折射率调节的溶剂中，在其中溶解了自由基引发剂和低于典型量的多官能丙烯酸酯（MAs）。SiO ₂通过MA的光自由基聚合和聚合的MA与SiO ₂颗粒上的PEI-OA的氨基之间的迈克尔加成反应，使悬浮液固化。这些可光固化的悬浮液可用于各种成型过程，从微型立体光刻到厘米规模的硅树脂成型。通过快速加热，也将具有复杂结构的SiO ₂生坯压碎并烧结成透明玻璃组件。