Views: 0 Author: Site Editor Publish Time: 2025-06-17 Origin: Site
Using ultrasonic atomization spray equipment to spray graphene has the following advantages, making it an efficient and controllable coating technology:
Gentle atomization: Ultrasonic atomization converts liquid into micron-sized droplets through high-frequency vibration (usually 20kHz–2MHz) without high pressure or high temperature, thus avoiding damage, wrinkling or oxidation of graphene sheets due to mechanical shear force or thermal stress during the spraying process.
Solvent compatibility: Suitable for water-based or organic solvent-dispersed graphene solutions, avoiding agglomeration caused by rapid solvent evaporation in traditional spraying.
Controllable droplet size: Ultrasonic atomization can generate uniform droplets with a diameter of 1-50μm (depending on the frequency and power), forming a uniform film from nanometer to micrometer scale, which is suitable for applications with high uniformity requirements such as graphene transparent conductive films and sensors.
Precision spraying: By adjusting parameters (such as frequency, flow rate, moving speed), the coating thickness (single layer or multi-layer) can be accurately controlled to avoid the uneven thickness problem of manual coating (such as spin coating, drip coating).
Low overspray loss: Directed spraying and atomization are highly efficient (up to over 90%), reducing graphene waste (conventional spraying may lose 30–50% of the material), which is especially important for high-cost few-layer graphene.
Applicable to low concentration solutions: Even low concentration dispersions (such as 0.1–1 mg/mL) can be effectively atomized, saving materials.
Low temperature process: suitable for heat-sensitive substrates such as plastics (PET, PI), paper, etc., to avoid high temperature annealing damage.
Non-contact spraying: The ultrasonic spray head does not touch the substrate, avoiding scratching of flexible or pre-patterned surfaces.
Compatible additives: Can be blended and sprayed with other nanomaterials (such as silver nanowires, carbon nanotubes) to prepare composite films.
Scalability potential: Easy to integrate with automation systems to achieve roll-to-roll (R2R) continuous production and improve efficiency.
Transparent conductive film (replacing ITO): used for flexible touch screens and OLEDs.
Sensors: Highly sensitive coatings for gas and biosensors.
Energy devices: lithium-ion battery electrodes, supercapacitor coatings.
Anti-corrosion/thermal conductive coating: functional treatment of metal surface.
