研究目的
To improve the adhesion between silver nanowires and polyethylene terephthalate (PET) film using a thermally crosslinkable polymer for flexible electronics applications.
研究成果
The use of a thermally crosslinkable polymer (NRC-1) effectively improves the adhesion between AgNWs and PET films, as confirmed by Scotch tape tests showing minimal change in sheet resistance. The polymer meets the required criteria and can be patterned for practical applications in flexible electronics.
研究不足
The polymer coating thickness was much thicker than necessary, potentially reducing optical transparency below 500 nm. The method may require optimization for thinner coatings and scalability for large-scale fabrication.
1：Experimental Design and Method Selection:
The study uses a thermally crosslinkable polymer (NRC-1) synthesized in-house to enhance adhesion. The polymer must meet criteria of transparency, solvent resistance, and crosslinking at 100-150°C.
2：Sample Selection and Data Sources:
PET films (DuPont Melinex, ~125 μm thickness) were used as substrates. Samples were prepared by spin-coating the polymer solution and spray-coating AgNWs.
3：List of Experimental Equipment and Materials:
Equipment includes a Harrick Plasma cleaner for plasma treatment, spin coater, spray coater, oven for baking, TA Instrument's Dynamic Scanning Calorimetry (DSC) for thermal analysis, scanning electron microscopy (SEM) for imaging, and Scotch tape for adhesion tests. Materials include AgNWs, NRC-1 polymer, and PET film.
4：Experimental Procedures and Operational Workflow:
PET films were plasma-treated (500 mtorr, high power, 1 min), then spin-coated with polymer solution (10 s ramp up, 60 s @600 rpm, 10 s ramp down). AgNWs were spray-coated, and samples were baked at 130°C or 150°C for 30 minutes. Adhesion was tested using Scotch tape peeling (5 times), and sheet resistance and optical transmission were measured.
5：Data Analysis Methods:
Sheet resistance was measured at multiple spots and averaged; optical transmission spectra were compared in the 300-1500 nm range; DSC was used to analyze thermal properties with a ramping rate of 5°C/min.
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