The advent of microfluidics, especially with the integration of droplet-based systems, has led to significant innovations and outstanding applications in many fields. While this field of study has grown increasingly over the years, the conventional method of fabricating these devices has discouraged their large-scale production, making their commercialization almost impossible. This is because traditional methods of producing droplet-based microfluidics are mostly time-consuming and labor-intensive and involve multiple processes. The emergence of 3D printing has found its application in microfluidics, providing an avenue for ease of fabrication with the aim of overcoming the limitations of conventional methods. While previous studies focused on studying the role of 3D printing in microfluidics, no study has categorically focused on the application of additive manufacturing to droplet-based microfluidics. This paper reviews the various 3D printing techniques associated with droplet-based microfluidics. Furthermore, we identify the salient features, limitations, and material properties of each printing technique while providing certain projections about their future application.

微流体技术的出现，尤其是与基于液滴的系统的集成，在许多领域带来了重大创新和杰出应用。虽然这一研究领域多年来不断发展，但制造这些设备的传统方法阻碍了它们的大规模生产，使其商业化几乎不可能。这是因为生产基于液滴的微流体的传统方法大多是耗时和劳动密集型的，并且涉及多个过程。3D 打印的出现已在微流体中得到应用，为易于制造提供了途径，旨在克服传统方法的局限性。虽然之前的研究侧重于研究 3D 打印在微流体中的作用，没有研究明确关注增材制造在基于液滴的微流体中的应用。本文回顾了与基于液滴的微流体相关的各种 3D 打印技术。此外，我们确定了每种印刷技术的显着特征、局限性和材料特性，同时提供了有关其未来应用的某些预测。