Article
Materials Science, Multidisciplinary
Roberto Bernasconi, Stefano Brovelli, Prisca Viviani, Marco Soldo, Domenico Giusti, Luca Magagnin
Summary: Drop-on-demand inkjet printing of highly viscous fluids is an emerging technology with great potential for industrial applications. The development of piezoelectric-driven printheads capable of jetting high-viscosity fluids is of interest, allowing for the deposition of ceramic suspensions and concentrated polymer solutions. In optimal conditions, solutions with viscosities exceeding 200 cP can be successfully jetted.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Engineering, Chemical
Tim Tofan, Sergejus Borodinas, Rimantas Kacianauskas, Raimondas Jasevicius
Summary: This article presents a numerical simulation of a printhead model for drop-on-demand inkjet printers. The study analyzes the behavior of ink droplets and the impact of different ejection settings on the accuracy of the printing process. The effects of printhead size, nozzle orifice, motion parameters, and fluid properties on droplet stability were also investigated.
Article
Chemistry, Multidisciplinary
Takuya Otowa, Shigetaka Tsubouchi, Yuji Suwa
Summary: This study investigates the ink-stream break-up phenomenon in continuous inkjet printers and develops a numerical model to analyze the effect of piezo-actuator oscillation on ink-stream break-up length (BUL). The model successfully reproduces the characteristic behavior of BUL and clarifies the mechanism behind the local minimum and maximum points, as verified by experimental data.
Review
Engineering, Chemical
Chen Wang, Myoung Jun Park, Young Woo Choo, Yuhan Huang, Sherub Phuntsho, Ho Kyong Shon
Summary: Recently, inkjet printing technology has gained attention for membrane fabrication and modification due to its advantages such as easy and fast process, minimal chemical consumption, and precise deposition. Understanding the inkjet printing technique for different membranes is crucial for accelerating its application in the field and producing advanced membranes with excellent performance.
Article
Computer Science, Artificial Intelligence
Xi Huang, Wei Long Ng, Wai Yee Yeong
Summary: In this study, a machine learning approach was used to predict the number of cells within printed droplets based on droplet velocity at two different points along the nozzle-substrate distance. A contactless method combining an optical system and machine learning algorithms was employed for cell detection within single droplets and prediction of the total number of printed cells within multiple droplets. Various machine learning algorithms were compared, and the random forest regressor algorithm achieved the highest accuracy in cell prediction within single droplets and the extra tree regressor algorithm demonstrated the lowest mean error in predicting the number of printed cells within multiple droplets. Incorporating these models in a droplet monitoring system enables live assessment of the number of printed cells during an inkjet-based bioprinting process.
JOURNAL OF INTELLIGENT MANUFACTURING
(2023)
Article
Pharmacology & Pharmacy
Robert Mau, Hermann Seitz
Summary: Drop-on-demand (DOD) inkjet printing allows precise dispensing and positioning of single droplets. This study investigates the reproducibility of droplet formation for piezoelectric inkjet printed drug solutions with different solvents. The results suggest that highly volatile solvents lead to rapid drug deposits on the nozzle, while low volatile solvents ensure reproducible droplet formation in long-term inkjet printing of highly concentrated drug solutions.
Article
Engineering, Manufacturing
Yoon Seong Kim, Wanhyuk Chang, Heon Jun Jeong, Keun Hee Kim, Hyun Soo Park, Joon Hyung Shim
Summary: An inkjet-printed PCFC with a BaZr0.2Ce0.6YZ0.1Yb0.1O3-delta electrolyte layer was successfully fabricated, achieving impressive performance and low degradation rate, which could contribute to the commercialization of high-performance PCFCs.
ADDITIVE MANUFACTURING
(2023)
Review
Mechanics
Detlef Lohse
Summary: This review provides an overview of the fluid dynamics of inkjet printing and discusses the main challenges for present and future research. The challenges on the printhead side include the flow inside the printhead, bubble entrainment, meniscus dynamics, wetting phenomena, and jet formation. On the receiving substrate side, challenges include droplet impact, merging, wetting, evaporation, and drying. Optimizing the process and materials as a whole is crucial for achieving efficient inkjet printing.
ANNUAL REVIEW OF FLUID MECHANICS
(2022)
Article
Chemistry, Multidisciplinary
Tim Tofan, Harald Kruggel-Emden, Vytautas Turla, Raimondas Jasevicius
Summary: The study utilized numerical simulation and analysis to investigate the motion and morphology changes of an ink droplet ejected through a nozzle, as well as its suitability for inkjet printhead nozzles, including velocity, size variations, and recommendations for specific inks.
APPLIED SCIENCES-BASEL
(2021)
Review
Chemistry, Multidisciplinary
Paola Carou-Senra, Lucia Rodriguez-Pombo, Atheer Awad, Abdul W. Basit, Carmen Alvarez-Lorenzo, Alvaro Goyanes
Summary: Inkjet printing (IJP) enables precise material deposition for personalized medicine and drug delivery. This review explores the formulation and components of pharma-inks, various substrate materials, and potential improvements through hardware, software, and artificial intelligence integration. Further exploration and optimization are needed to fully harness the healthcare capabilities of IJP.
ADVANCED MATERIALS
(2023)
Article
Engineering, Manufacturing
Huayang Li, Weili Yang, Yongqing Duan, Wei Chen, Guannan Zhang, YongAn Huang, Zhouping Yin
Summary: This study proposes an optimized waveform design for electrohydrodynamic drop-on-demand (EHD DOD) printing, which effectively eliminates residual oscillation in printing by adding an additional voltage pulse when jetting stops and retracts. The optimized waveform achieves a stable printing frequency that is 1.92 times higher than the unoptimized one, promoting its application in high-resolution additive manufacturing.
ADDITIVE MANUFACTURING
(2022)
Article
Chemistry, Analytical
Sarah May Sibug-Torres, Lance P. Go, Virgil Christian G. Castillo, Jiena Lynne R. Pauco, Erwin P. Enriquez
Summary: This study demonstrates the successful design and fabrication of a highly integrated electrochemical platform using additive manufacturing technologies. The electrochemical sensor system can rapidly and accurately detect nitrate ions in water samples, showing good reproducibility and stability in real aquaculture water samples.
ANALYTICA CHIMICA ACTA
(2021)
Article
Engineering, Multidisciplinary
A. A. Castrejon-Pita, E. S. Betton, N. Campbell, N. Jackson, J. Morgan, T. R. Tuladhar, D. C. Vadillo, J. R. Castrejon-Pita
Summary: Advancements in rheology and other technologies have significantly improved inkjet technology in terms of ink viscosity, printing quality, and reliability, allowing for more accurate assessment and prediction of printing behavior. Additionally, inkjet technology is expanding its applications, displacing traditional printing technologies and entering various new markets.
ATOMIZATION AND SPRAYS
(2021)
Article
Engineering, Biomedical
Wei Long Ng, Xi Huang, Viktor Shkolnikov, Ratima Suntornnond, Wai Yee Yeong
Summary: This study investigates the influence of bioink properties on printing performance and cell health, finding that higher bioink viscoelasticity helps to stabilize droplet filaments and higher bioink viscosity improves droplet deposition accuracy and cell viability.
BIO-DESIGN AND MANUFACTURING
(2023)
Article
Engineering, Biomedical
Wei Long Ng, Xi Huang, Viktor Shkolnikov, Guo Liang Goh, Ratima Suntornnond, Wai Yee Yeong
Summary: A study utilizing a thermal inkjet system to dispense sub-nanoliter cell-laden droplets identified droplet impact velocity and droplet volume as significant factors affecting the viability and proliferation of printed cells. Increasing cell concentration leads to slower impact velocity, improving cell viability, while a minimum droplet volume of 20 nL helps mitigate evaporation-induced cell damage. Control of droplet impact velocity and volume is crucial for viability and proliferation of printed human primary cells in sub-nanoliter bioprinting.
INTERNATIONAL JOURNAL OF BIOPRINTING
(2022)
