The role of wettability of nonideal nozzle plate: From drop‐on‐demand droplet jetting to impact on solid substrate

Zhang, Lei; Ku, Tao; Jia, Jingsong; Cheng, Xiaoding

doi:10.1002/aic.16139

Cited by 12 publications

(4 citation statements)

References 40 publications

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“…14 The nozzle is blocked more easily at lower jetting speed when the Z value is larger. 24,40 Reactive red 218 solutions had a smaller Z value compared with reactive red 24:1 solution with the same concentration of DEG, resulting in more stable droplets of RR218, which was consistent with the droplet formation. Therefore, the smaller Z value of dye solution was beneficial to improve dye utilization.…”

Section: ■ Results and Discussionsupporting

confidence: 62%

Insights into Influences of Dye Hydrophobicity on Cleanliness and Resolution of Fabric Ink-Jet Printing

Qin

Fang

Ren

et al. 2020

ACS Sustainable Chem. Eng.

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Fabric ink-jet printing is a crucial technology of clean production in the textile industry. Reactive dyes and organic solvents are the important component of ink-jet printing ink. The structure, hydrophobicity, and aggregation degree of reactive dye affect the amount of organic solvent and ink droplets spread on fabric, which is essential for reducing organic solvent dosage and obtaining high quality ink-jet printing images on fabric. In this study, two red reactive dyes (reactive red 218 dye and reactive red 24:1) with different structures were used to prepare reactive dye solutions, which were subsequently explored by investigating the surface tension, rheological properties, visible absorption spectra, and droplet formation and observing the spreading behavior on cotton fabrics. For the first time, the effects of dye hydrophobicity on organic solvent dosage and ink-jet image resolution were studied. The results showed that reactive red 218 dyes possessed stronger hydrophobicity and more compact aggregation. Reactive red 218 clusters were more easily disaggregated into dye monomers through the hydrophobic interaction between the DEG and dye molecules, while reactive red 24:1 clusters were disaggregated into small clusters. Reactive red 218 solution droplets were more stable, which could reduce the air pollution caused by the satellite droplets. Based on the above reasons, the solution of dye with stronger hydrophobicity required less organic solvent and had a smaller droplet spread area (represents higher printing resolution) on the fabric. These findings provided a novel direction for reducing organic solvent consumption and improving the utilization rate of dye solution.

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Section: ■ Results and Discussionsupporting

confidence: 62%

Insights into Influences of Dye Hydrophobicity on Cleanliness and Resolution of Fabric Ink-Jet Printing

Qin

Fang

Ren

et al. 2020

ACS Sustainable Chem. Eng.

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show abstract

“…[23] A better understanding of the difference between the surface energy of the ink and nozzle is also essential to overcome nozzle plate wetting issue. [25,[155][156][157] Some inkjet printheads are specially engineered with non-wetting film on the nozzle plate to hinder ink collection between cleaning cycles and promote stable and reliable jetting. [158] Appropriate nozzle diameter is normally selected according to the ink properties and pattern specifications.…”

Section: Printhead and Nozzle Designmentioning

confidence: 99%

Inkjet Printing Optimization: Toward Realization of High‐Resolution Printed Electronics

Kamarudin,

Abdul Aziz,

Lee

et al. 2024

Adv Materials Technologies

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The printed electronics (PEs) market has witnessed substantial growth, reaching a valuation of USD 10.47 billion in the previous year. Driven by its extensive use in a multitude of applications, this growth trend is expected to continue with a projected compound annual growth rate of 22.3% from 2022 to 2032. Compared to screen printing, the adoption of inkjet printing (IJP) technology to manufacture PEs has been limited to laboratory‐scale research only. The fact that IJP's inability to maintain consistent high‐resolution quality over large printing areas has made transitioning IJP for commercial production arduous. Most of the previous literatures have focused on holistic discussion on material design for IJP, but this review provides insight into key aspects in material processing up to printing optimization to realize high‐resolution PEs. This review also highlights the challenges in controlling the functional ink properties and their interaction with the substrate as well as printing parameters to deliver the desired quality of the droplets and final prints. Imminent application of IJP in PEs and future perspectives are also included in this review.

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“…Further increasing the pre-heating temperature or varying the inks formulation could weaken the coffee ring effects. However, intensive heat transfer could influence the jetting behaviors for precision printhead [26], [27]. The variation of inks formulation gives rise in the inkjet instabilities and time cost [28].…”

Section: B Continuous Printing Mode With Multiple Layers Printingmentioning

confidence: 99%

Geometrical Morphology of Inkjet-Printed Finger Electrodes on Untreated Multi-Crystalline Silicon Solar Cells

Zhang

Cheng

et al. 2019

IEEE J. Photovoltaics

Self Cite

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The geometrical morphologies fabricated by continuous and interlacing printing modes on untreated multi-crystalline solar cells are quantitively explored for uniform and high aspectratio finger electrodes. The voltage waveform of printhead is well modulated by in-house developed inkjet prototype printer for optimizing the droplet volume and velocity. As the fingers are fabricated with continuous printing mode by varying printing parameters, the bulging and coffee ring morphologies could not be eliminated resulting from the rough and anisotropic features. The interlacing printing mode is first introduced for finger electrodes fabrication. Results show that the width of the printed finger is not influenced by the printing layers and maintains the stable values of ∼60 µm with pre-heating temperature 80°C. Moreover, the interlacing printing mode has a high tolerance of droplet spacing variance (30-45 µm) and suppresses the coffee ring morphology which obtains uniform finger electrodes. The study not only offers good guidance of finger electrodes fabrication for multi-crystalline solar cell manufacturing, but also proposes in-depth insights for the three-dimensional circuit structures fabrication of the emerging printed electronics. Index Terms-Droplet spacing, finger electrode, inkjet-printed, interlacing printing mode, multiple layers. I. INTRODUCTION T HE finger electrodes fabrication in crystalline silicon solar cell industry has been a key process which directly affects the solar cell efficiency and also constitutes a major part of product cost [1], [2]. To date, screen printing is the mainstream

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The role of wettability of nonideal nozzle plate: From drop‐on‐demand droplet jetting to impact on solid substrate

Cited by 12 publications

References 40 publications

Insights into Influences of Dye Hydrophobicity on Cleanliness and Resolution of Fabric Ink-Jet Printing

Insights into Influences of Dye Hydrophobicity on Cleanliness and Resolution of Fabric Ink-Jet Printing

Inkjet Printing Optimization: Toward Realization of High‐Resolution Printed Electronics

Geometrical Morphology of Inkjet-Printed Finger Electrodes on Untreated Multi-Crystalline Silicon Solar Cells

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