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Challenges and Advances in Aerosol Jet Printing of Regenerated Silk Fibroin Solutions
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-04-27 , DOI: 10.1002/admi.201902005 Yuhan Xiao 1 , Kyriaki Kalaitzidou 1, 2 , Donggang Yao 2 , Woon‐Hong Yeo 1, 3 , Tequila A. L. Harris 1
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-04-27 , DOI: 10.1002/admi.201902005 Yuhan Xiao 1 , Kyriaki Kalaitzidou 1, 2 , Donggang Yao 2 , Woon‐Hong Yeo 1, 3 , Tequila A. L. Harris 1
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Silk fibroin materials are manufactured using printing and coating techniques at resolutions 1–2 µm. However, current processes are unstable, of low printability and versatility, and of limited feature size, and often require use of additives to process, which can impact material functionality and performance. Although there exist well established material synthesis and formulation approaches for making processable solutions from silkworm cocoons, these approaches do not translate to the emerging fabrication processes, such as aerosol jet printing (AJP). Here, a new approach is introduced to formulate silk‐worm solutions for AJP and subsequently analyze the processing limits, due to defects such as overspray, pooling, and cloudiness. It is found that the degumming step is critical and can lead to defects such as gelling and pooling. Furthermore, it is found that there exists a narrow processing window (sheath rate as a function of ink rate) for AJP formulations without defects. As with other materials (such as metal inks), overspray is an issue during the fabrication process; however, it is minimized within the processing window. This work stands to open a pathway for manufacturing new and emerging biodegradable materials suitable for pharmaceuticals, food packaging, and electronics, among others.
中文翻译：
再生丝素蛋白溶液气溶胶喷射印刷的挑战与进展
丝素蛋白材料是使用印刷和涂层技术制造的，分辨率为1-2 µm。但是，当前的工艺不稳定，可印刷性和多功能性差，特征尺寸有限，并且经常需要使用添加剂进行加工，这会影响材料的功能和性能。尽管存在用于从蚕茧制备可加工溶液的公认的材料合成和配制方法，但是这些方法并未转化为新兴的制造工艺，例如气溶胶喷射印刷（AJP）。在这里，引入了一种新方法来为AJP制定蠕虫解决方案，然后分析由于过喷，合并和混浊等缺陷而导致的处理限制。发现脱胶步骤很关键，并且可能导致诸如胶凝和合并的缺陷。此外，已经发现，对于AJP制剂而言，存在没有缺陷的狭窄的加工窗口（鞘率作为油墨率的函数）。与其他材料（例如金属墨水）一样，过度喷涂是制造过程中的一个问题。但是，在处理窗口内将其最小化。这项工作为制造适用于药品，食品包装和电子产品等的新型和可生物降解材料开辟了道路。
更新日期：2020-04-27
中文翻译：
再生丝素蛋白溶液气溶胶喷射印刷的挑战与进展
丝素蛋白材料是使用印刷和涂层技术制造的，分辨率为1-2 µm。但是，当前的工艺不稳定，可印刷性和多功能性差，特征尺寸有限，并且经常需要使用添加剂进行加工，这会影响材料的功能和性能。尽管存在用于从蚕茧制备可加工溶液的公认的材料合成和配制方法，但是这些方法并未转化为新兴的制造工艺，例如气溶胶喷射印刷（AJP）。在这里，引入了一种新方法来为AJP制定蠕虫解决方案，然后分析由于过喷，合并和混浊等缺陷而导致的处理限制。发现脱胶步骤很关键，并且可能导致诸如胶凝和合并的缺陷。此外，已经发现，对于AJP制剂而言，存在没有缺陷的狭窄的加工窗口（鞘率作为油墨率的函数）。与其他材料（例如金属墨水）一样，过度喷涂是制造过程中的一个问题。但是，在处理窗口内将其最小化。这项工作为制造适用于药品，食品包装和电子产品等的新型和可生物降解材料开辟了道路。
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