研究目的
To fabricate inkjet-printed silver films on textiles for wearable electronics applications, focusing on improving surface smoothness and electrical properties through an interface layer.
研究成果
The inkjet-printed silver films on textiles with an interface layer exhibit good electrical properties, fatigue resistance, and washability, making them suitable for wearable electronics. The interface layer homogenizes the electrical characteristics across different textiles, enabling flexible and rapid manufacturing. Future work could explore broader material sets and enhanced durability.
研究不足
The study is limited to specific textiles and interface materials; scalability to other materials or industrial processes may require further optimization. The sintering temperature of 150°C may not be suitable for all textile types, and long-term durability under repeated washing or mechanical stress was not extensively tested.
1:Experimental Design and Method Selection:
The study used screen printing to apply an interface layer (Fabink-UV-IF1) on textiles to fill pores and create a smooth surface for inkjet printing. Inkjet printing was then used to deposit silver films, with parameters like droplet spacing and number of passes optimized. Hard-baking was employed to adjust surface wettability.
2:Sample Selection and Data Sources:
Four types of textiles were used: T/C fabric (80% Terylene and 20% Cotton), pure cotton (100% cotton), nylon, and cleanroom wiper (polyester double knit). Samples were prepared with interface layers and silver films for analysis.
3:List of Experimental Equipment and Materials:
Equipment included a screen printing setup with stencil and squeegee, UV exposure system, oven for baking, DMP-2800 inkjet printer, SEM (Hitachi S-3400N) for morphology analysis, water contact angle measurement setup, dynamic bending test apparatus, and HP E8364C network analyzer for S-parameter measurements. Materials included Fabink-UV-IF1 interface paste and silver ink (DGP-40LT-15C).
4:Experimental Procedures and Operational Workflow:
Steps involved screen printing the interface layer in two passes with UV curing, hard-baking to optimize wettability, inkjet printing silver films at 60°C with multiple passes, sintering at 150°C for 1 hour, and conducting morphological, wettability, electrical, and bending tests.
5:Data Analysis Methods:
Data were analyzed using SEM for surface and cross-sectional imaging, water contact angle measurements for wettability, sheet resistance and conductivity calculations from electrical tests, and S-parameter measurements to compute relative permittivity and loss tangent using the two-transmission-line-method.
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