Piezoelectric inkjet has been widely applied in printing field thanks to its advantages of ejecting small droplet precisely. The method of printing biodegradable structure for tissue support or connection by piezoelectric inkjet is proposed in this work, which will contribute to wound repair in vivo and avoid secondary trauma caused by removing non-biodegradable support. A piezoelectric inkjet with simple structure is designed for printing biodegradable ethyl cyanoacrylate solution. Basic studies of printing biodegradable ethyl cyanoacrylate structure are carried out. The spreading characteristics of ethyl cyanoacrylates droplets before solidification under different conditions are studied by simulation analyses, and the methods for stabilizing the spreading performance and avoiding failure spreading are obtained. The spreading characteristics of the droplets before and after solidification under different conditions are analyzed by experiments, and the corresponding shrinkage ratios are obtained. Based on the obtained shrinkage ratios (between 70 % and 75 % when spreading without satellite droplets) and spreading dimensions before solidification (obtained by simulation analyses), the final formed size of the ethyl cyanoacrylate droplet can be estimated to determine the appropriate printing distance in continuous printing. A simple structure is printed by the piezoelectric inkjet to verify the feasibility of the proposed method of the printing ethyl cyanoacrylate biodegradable structure for medical care.

压电喷墨技术具有精确喷射小液滴的优点，因此已在印刷领域得到广泛应用。在这项工作中提出了一种通过压电喷墨打印用于组织支撑或连接的可生物降解结构的方法，这将有助于体内伤口的修复并避免由于去除不可生物降解的支撑物而引起的继发性创伤。设计具有简单结构的压电喷墨器，以印刷可生物降解的氰基丙烯酸乙酯溶液。进行了可生物降解的氰基丙烯酸乙酯结构印刷的基础研究。通过仿真分析研究了氰基丙烯酸乙酯微滴在不同条件下凝固前的扩散特性，得到了稳定扩散性能和避免失效扩散的方法。通过实验分析了液滴在不同条件下凝固前后的扩散特性，得到了相应的收缩率。根据所获得的收缩率（无卫星滴状涂布时的收缩率在70％到75％之间）和固化前的涂布尺寸（通过模拟分析获得），可以估算出氰基丙烯酸乙酯滴的最终形成尺寸，以确定适当的印刷距离。连续打印。通过压电喷墨打印一种简单的结构，以验证所提出的用于医疗护理的氰基丙烯酸乙酯可生物降解结构的打印方法的可行性。根据所获得的收缩率（无卫星滴状涂布时的收缩率在70％到75％之间）和固化前的涂布尺寸（通过模拟分析获得），可以估算出氰基丙烯酸乙酯滴的最终形成尺寸，以确定适当的印刷距离。连续打印。通过压电喷墨印刷一种简单的结构，以验证所提出的用于医疗护理的氰基丙烯酸乙酯生物可降解结构的印刷方法的可行性。根据所获得的收缩率（无卫星滴状涂布时的收缩率在70％到75％之间）和固化前的涂布尺寸（通过模拟分析获得），可以估算出氰基丙烯酸乙酯滴的最终形成尺寸，以确定适当的印刷距离。连续打印。通过压电喷墨打印一种简单的结构，以验证所提出的用于医疗护理的氰基丙烯酸乙酯可生物降解结构的打印方法的可行性。