Multicolor Digital Light Processing 3D Printing Enables Dissolvable Supports for Freestanding and Non-Assembly Structures.

IF 12.7 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
ACS Central Science Pub Date : 2025-05-29 eCollection Date: 2025-06-25 DOI:10.1021/acscentsci.5c00289
Keldy S Mason, Ji-Won Kim, Elizabeth A Recker, Jenna M Nymick, Mingyu Shi, Franz A Stolpen, Jaechul Ju, Zachariah A Page
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引用次数: 0

Abstract

The limited diversity in photocurable resin chemistries has precluded access to certain geometries using digital light processing (DLP) 3D printing, a rapid, precise, economical, and low-waste manufacturing technology. Specifically, freestanding structures with floating overhangs (e.g., hooks) and mobile nonassembly structures that cannot be physically separated (e.g., joints) represent two such geometries that are difficult or impossible to access with contemporary DLP 3D printing. Herein, we disclose novel resins that selectively react with different colors of light to form soluble thermoplastics and insoluble thermosets. Systematic characterization of the acrylate- and epoxy-based resins and corresponding polymers from simultaneous UV and visible (violet or blue) light exposure revealed a rapid multimaterial 3D printing process (∼0.75 mm/min) capable of providing supports that dissolve in ethyl acetate, a "green" solvent, within 10 min at room temperature. Relative to manual support removal, the present process provides comparable or improved surface finishes and higher throughput. Finally, several proof-of-concept structures requiring dissolvable supports were 3D printed, including hooks, chains, and joints, which were scanned using computed tomography to showcase the process's geometric versatility and high fidelity. This work provides fundamental design principles for multimaterial resin chemistry and lays a foundation for automating next generation additive manufacturing.

多色数字光处理3D打印使独立和非组装结构的可溶解支撑成为可能。
光固化树脂化学物质的有限多样性阻碍了使用数字光处理(DLP) 3D打印实现某些几何形状,这是一种快速、精确、经济、低浪费的制造技术。具体来说,具有浮动悬垂的独立结构(例如,钩子)和不能物理分离的移动非组装结构(例如,关节)代表了两种这样的几何形状,这是当代DLP 3D打印难以或不可能获得的。在此,我们公开了一种新型树脂,它可以选择性地与不同颜色的光反应,形成可溶性热塑性塑料和不溶性热固性塑料。通过同时紫外线和可见光(紫色或蓝色)曝光对丙烯酸酯和环氧树脂及相应聚合物进行系统表征,揭示了一种快速的多材料3D打印工艺(~ 0.75 mm/min),能够在室温下10分钟内提供溶解在乙酸乙酯(一种“绿色”溶剂)中的支撑。相对于手工移除支架,目前的工艺提供了相当或改进的表面光洁度和更高的吞吐量。最后,3D打印了几个需要可溶解支架的概念验证结构,包括钩子、链条和关节,并使用计算机断层扫描来展示该工艺的几何多功能性和高保真度。这项工作为多材料树脂化学提供了基本的设计原则,并为自动化下一代增材制造奠定了基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
ACS Central Science
ACS Central Science Chemical Engineering-General Chemical Engineering
CiteScore
25.50
自引率
0.50%
发文量
194
审稿时长
10 weeks
期刊介绍: ACS Central Science publishes significant primary reports on research in chemistry and allied fields where chemical approaches are pivotal. As the first fully open-access journal by the American Chemical Society, it covers compelling and important contributions to the broad chemistry and scientific community. "Central science," a term popularized nearly 40 years ago, emphasizes chemistry's central role in connecting physical and life sciences, and fundamental sciences with applied disciplines like medicine and engineering. The journal focuses on exceptional quality articles, addressing advances in fundamental chemistry and interdisciplinary research.
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