Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel.
Nano Lett. 2020 Sep 9;20(9):6598-6605. doi: 10.1021/acs.nanolett.0c02364. Epub 2020 Aug 10.
Ordered mesoporous silica materials gain high interest because of their potential applications in catalysis, selective adsorption, separation, and controlled drug release. Due to their morphological characteristics, mainly the tunable, ordered nanometric pores, they can be utilized as supporting hosts for confined chemical reactions. Applications of these materials, however, are limited by structural design. Here, we present a new approach for the 3D printing of complex geometry silica objects with an ordered mesoporous structure by stereolithography. The process uses photocurable liquid compositions that contain a structure-directing agent, silica precursors, and elastomer-forming monomers that, after printing and calcination, form porous silica monoliths. The objects have extremely high surface area, 1900 m/g, and very low density and are thermally and chemically stable. This work enables the formation of ordered porous objects having complex geometries that can be utilized in applications in both the industry and academia, overcoming the structural limitations associated with traditional processing methods.
有序介孔硅材料由于在催化、选择性吸附、分离和控制药物释放等方面的潜在应用而受到高度关注。由于其形态特征，主要是可调的、有序的纳米级孔，它们可用作受限化学反应的支撑宿主。然而，这些材料的应用受到结构设计的限制。在这里，我们提出了一种通过立体光刻技术 3D 打印具有有序介孔结构的复杂几何形状的二氧化硅物体的新方法。该工艺使用可光固化的液体组合物，其中包含结构导向剂、二氧化硅前体和弹性体形成单体，这些单体在打印和煅烧后形成多孔二氧化硅块体。这些物体具有极高的比表面积（1900 m/g）和极低的密度，并且热稳定性和化学稳定性都很好。这项工作能够形成具有复杂几何形状的有序多孔物体，这些物体可用于工业和学术界的应用，克服了与传统加工方法相关的结构限制。
