Light-Based Printing of Leachable Salt Molds for Facile Shaping of Complex Structures,Advanced Materials

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Light-Based Printing of Leachable Salt Molds for Facile Shaping of Complex Structures
Advanced Materials ( IF 27.4 ) Pub Date : 2022-06-22 , DOI: 10.1002/adma.202203878
Nicole Kleger ₁ , Simona Fehlmann ₁ , Seunghun S Lee ₂ , Cyril Dénéréaz ₃ , Martina Cihova ₄ , Nevena Paunović ₅ , Yinyin Bao ₅ , Jean-Christophe Leroux ₅ , Stephen J Ferguson ₂ , Kunal Masania ₁ , André R Studart ₁

Affiliation

3D printing is a powerful manufacturing technology for shaping materials into complex structures. While the palette of printable materials continues to expand, the rheological and chemical requisites for printing are not always easy to fulfill. Here, a universal manufacturing platform is reported for shaping materials into intricate geometries without the need for their printability, but instead using light-based printed salt structures as leachable molds. The salt structures are printed using photocurable resins loaded with NaCl particles. The printing, debinding, and sintering steps involved in the process are systematically investigated to identify ink formulations enabling the preparation of crack-free salt templates. The experiments reveal that the formation of a load-bearing network of salt particles is essential to prevent cracking of the mold during the process. By infiltrating the sintered salt molds and leaching the template in water, complex-shaped architectures are created from diverse compositions such as biomedical silicone, chocolate, light metals, degradable elastomers, and fiber composites, thus demonstrating the universal, cost-effective, and sustainable nature of this new manufacturing platform.

中文翻译：

可浸出盐模具的光基打印，便于复杂结构的成型

3D打印是一种强大的制造技术，可以将材料塑造成复杂的结构。虽然可印刷材料的种类不断扩大，但印刷的流变学和化学要求并不总是很容易满足。在这里，报告了一个通用制造平台，用于将材料塑造成复杂的几何形状，而不需要它们的可印刷性，而是使用基于光的印刷盐结构作为可浸出模具。盐结构使用装载有 NaCl 颗粒的光固化树脂印刷。系统地研究了该过程中涉及的印刷、脱脂和烧结步骤，以确定能够制备无裂纹盐模板的油墨配方。实验表明，盐颗粒的承载网络的形成对于防止模具在此过程中开裂至关重要。通过渗透烧结盐模具并在水中浸出模板，由生物医学硅胶、巧克力、轻金属、可降解弹性体和纤维复合材料等多种成分创建复杂形状的结构，从而展示了通用性、成本效益和可持续性这个新的制造平台的性质。

更新日期：2022-06-22

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