Controlling the Polymer Ink’s Rheological Properties to Form Single and Stable Droplet
Source abstract
Abstract
The formation of single and stable ink droplets is crucial for producing high-quality functional films in drop-on-demand (DOD) inkjet printing. The stability and singularity of droplet formation are significantly influenced by filament breakup behavior, governed by the rheological parameters of the ink formula. This study explores the droplet formation behavior of Poly3-hexylthiophene (P3HT) ink across various Weber numbers (We) and assesses the impact of the Z value on the formation of single ink droplets. Observations reveal that as the We number increases, droplet morphology transitions from single to double, and eventually to sputtered droplets. Results demonstrate that stable, single droplets form when the We number ≤ 13 and 12 < Z < 34, with a pulse duration of approximately 340 μs. When the We number exceeds 13, the molecular chains of P3HT stretch due to high hydrodynamic forces, resulting in the formation of unwanted satellite droplets.
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Research context
OpenAlex topics: Nanomaterials and Printing Technologies · Advanced Sensor and Energy Harvesting Materials · Fluid Dynamics and Thin Films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials & Environmental Engineering, Shenzhen Polytechnic University, Shenzhen 518055, China
Department of Power Mechanical Engineering, Beijing Jiaotong University, Beijing 100044, China
School of Chemistry Engineering, East China University of Science and Technology, Shanghai 200237, China
Funding
Shenzhen Polytechnic Research Fund · Post-doctoral Later-stage Foundation Project of Shenzhen Polytechnic · Basic and Applied Basic Research Funding of Guangdong · Provincial Education Department of Guangdong · Shenzhen Science and Technology Program · Provincial High Vocational Education Teaching Reform Research and Practice Project · Key funded projects of special funds for scientific and technological innovation strategy of Guangdong Province · Founding of Shenzhen polytechnic
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