High-performance green binders for ink-jetting advanced additive manufacturing of metallic structures

粘合剂喷射是一种先进的增材制造技术，能够3D打印金属结构。它的工作原理是将粘合剂配方印刷到金属粉末床上，使该层固化并添加后续层。一旦3D部件形成，将其放置在高温烘箱中以烧掉粘合剂并烧结金属颗粒。莱斯工业公司开发了一种粘合剂喷射的变体，可以非常快速地制造3D金属结构（比竞争对手快500倍），但它面临着与所使用的粘合剂有关的问题。具体地，粘合剂是不可再生的，并且在烧除之后可能对环境和最终产品质量具有有害的影响。Sautech与蒙特利尔理工大学合作，希望测试新的生物来源的粘合剂配方，即壳聚糖和醋酸纤维素。通过该短期Engage项目，将评估粘结剂渗透到粉末床中的情况，沿着 ** 其干燥性能，由此产生的拉伸强度和热降解性能（导致完整的 ** 烧结方案）。该项目的完成将帮助加拿大成为先进增材制造领域的领导者，使Sautech能够在这个不断发展的领域进行创新并保持竞争力。

Binder jetting is an advanced additive manufacturing technique capable of 3D printing metallic structures. It**works by printing a binder formulation onto a bed of metal powder, allowing that layer to solidify and adding a**subsequent layer. Once the 3D part is formed, it is placed in a high-temperature oven to burn off the binder and**sinter the metal particles. Les Industries Sautech Inc. has developed a variant of binder jetting that allows for**the very rapid fabrication of 3D metallic structures (500 times faster than its competitors), but it is faced with**issues pertaining to the binders used. Specifically, the binders are non-renewable, and can have detrimental**effects on the environment and final product quality following burn-off. In collaboration with Polytechnique**Montreal, Sautech wishes to test new, bio-sourced binder formulations, namely chitosan and cellulose acetate.**Through this short-term Engage project, binder penetration into the powder beds will be assessed, along with**its drying properties, resulting tensile strength and thermal degradation properties (leading to a complete**sintering protocol). The completion of this project will help situate Canada as a leader in advanced additive**manufacturing, allowing Sautech to innovate and stay competitive in this evolving field.