Shukrun Efrat, Cooperstein Ido, Magdassi Shlomo
Casali Center for Applied Chemistry Institute of Chemistry The Center for Nanoscience and Nanotechnology The Hebrew University of Jerusalem Jerusalem 9190401 Israel.
Adv Sci (Weinh). 2018 May 28;5(8):1800061. doi: 10.1002/advs.201800061. eCollection 2018 Aug.
Hybrid organic-inorganic sol gel inks that can undergo both condensation and radical polymerization are developed, enabling fabrication of complex objects by additive manufacturing technology, yielding 3D objects with superior properties. The 3D objects have very high silica content and are printed by digital light processing commercial printers. The printed lightweight objects are characterized by excellent mechanical strength compared to currently used high-performance polymers (139 MPa), very high stability at elevated temperatures (heat deflection temperature >270 °C), high transparency (89%), and lack of cracks, with glossiness similar to silica glasses. The new inks fill the gap in additive manufacturing of objects composed of ceramics only and organic materials only, thus enabling harnessing the advantages of both worlds of materials.
开发出了既能发生缩合反应又能进行自由基聚合反应的有机-无机杂化溶胶凝胶油墨，这使得通过增材制造技术制造复杂物体成为可能，从而生产出具有优异性能的三维物体。这些三维物体具有非常高的二氧化硅含量，并通过数字光处理商业打印机进行打印。与目前使用的高性能聚合物（139兆帕）相比，打印出的轻质物体具有优异的机械强度，在高温下具有非常高的稳定性（热变形温度>270°C），高透明度（89%），并且没有裂纹，光泽度与石英玻璃相似。这种新型油墨填补了仅由陶瓷和仅由有机材料组成的物体增材制造方面的空白，从而能够利用这两种材料的优势。
