Thin Layer Tungsten Disulfide Composite Dispersion Spraying Process

Ultrasonic spraying | Thermal electric single-walled carbon nanotube/thin layer tungsten disulfide composite dispersion spraying process scheme

Product Introduction: Core Characteristics of Thermoelectric Composite Nanodispersion Liquid

Thermoelectric specific single-walled carbon nanotube thin layer tungsten disulfide composite dispersion is a composite nano functional slurry developed for high-performance thermoelectric devices. It is made by combining a few layer tungsten disulfide two-dimensional nanosheets as the thermoelectric matrix and single-walled carbon nanotubes as the conductive reinforcement filler. It combines the dual performance advantages of two-dimensional metal sulfides and carbon nanomaterials, and is the core coating material for flexible thermoelectric fabrics, high-precision thermoelectric sensors, and new energy thermoelectric conversion chips.

The appearance of the dispersed liquid is a homogeneous black liquid phase, with strong storage stability and no obvious agglomeration or stratification after long-term standing; Material specifications are controllable: tungsten disulfide nanosheets have only 1-10 layers, with a lateral size of 50nm -1 μ m, single-walled carbon nanotubes have a diameter of 1-2 nm, and the slurry concentration can be customized according to needs. The production adopts ultrasonic exfoliation combined with conductive polymer modified dispersion process, which is compatible with multiple systems such as water ethanol mixed solvents and NMP organic solvents. Compared with pure tungsten disulfide dispersion, the composite slurry has better thermoelectric transmission performance, substrate interface adhesion, and dispersion uniformity, perfectly matching the production standards of ultra-thin precision coating for thermoelectric devices.

The pain points of traditional coating technology restrict the implementation of thermoelectric film performance

This set of carbon nanotube/tungsten disulfide composite dispersion materials itself has natural processing difficulties: the surface energy of thin tungsten disulfide nanosheets is high, and the van der Waals forces between the layers are easily stacked and agglomerated; Single walled carbon nanotubes have a large aspect ratio and are prone to entanglement and agglomeration with each other; After the combination of two types of nanomaterials, the agglomeration problem is further exacerbated, which will directly block the internal thermoelectric conduction path of the film and significantly reduce the energy conversion efficiency of the device.

The conventional air pressure spraying and spin coating processes have irreversible defects: high-pressure airflow, strong mechanical shear force impact, and easy tearing of fragile thin tungsten disulfide nanosheets, breaking of single-walled carbon nanotubes, and destruction of the nano native structure; At the same time, the slurry is prone to delamination and settling, resulting in large thickness differences, multiple pore cracks, and insufficient density of the final formed film. The defect film cannot exert the intrinsic thermoelectric properties of composite materials, severely limiting the mass industrial application of this high-end nano dispersion in the thermoelectric industry.

Ultrasonic Spray Coating: A Specialized Coating Process Suitable for Thermoelectric Composite Dispersions

The ultrasonic spraying equipment customizes an exclusive spraying solution for the material characteristics of carbon nanotubes+thin layer tungsten disulfide composite dispersion, solving various processing defects in traditional processes from the perspective of atomization bottom layer logic. The equipment adopts 20-120kHz broadband ultrasonic atomization technology, which converts electrical energy into high-frequency micro vibrations through piezoelectric transducers to dissociate the dispersed liquid into fine and micro droplets. The entire process is low-pressure soft atomization, without high-pressure impact or strong mechanical shear, achieving soft landing and deposition of droplets.

The spraying process fully protects the thin layer structure of tungsten disulfide and the intact morphology of single-walled carbon nanotubes, preventing layer damage and carbon nanotube fracture; At the same time, relying on uniform atomization to disperse nano aggregates, avoiding slurry stratification, ensuring uniform distribution of carbon nanotubes and tungsten disulfide nanosheets inside the droplets, and constructing a continuous and complete thermoelectric conduction path inside the formed film, fully unleashing the synergistic thermoelectric advantages of composite materials.

The core differentiation advantages of ultrasonic spraying compared to traditional processes

High uniformity of thin film, ultra-thin, dense and defect free
The coating thickness error is controlled within 5%, and continuous nanoscale ultra-thin thermoelectric thin films can be prepared. The film layer is dense without pinholes or cracks, maximizing the power factor and thermoelectric conversion efficiency of the device, and meeting the stringent performance indicators of high-end thermoelectric devices.
High utilization rate of raw materials, reducing production costs
The non-contact directional deposition atomization method has a dispersion material utilization rate of over 90%, significantly reducing the loss of nano slurry and lowering the production cost of high-end nano materials, in line with low-carbon green production standards.
Strong substrate and solvent compatibility, full field adaptation
Compatible with carbon nanotube/tungsten disulfide dispersions with different solid contents and multiple types of organic solvent systems; Suitable for various thermoelectric substrates such as flexible thermoelectric fabrics, silicon-based wafers, metal substrates, etc., it can not only achieve precision coating on laboratory small area samples, but also support industrial continuous spraying of large-area coil materials; The nozzle comes with a self-cleaning structure, which is less prone to material blockage and reduces equipment downtime for maintenance.

Multiple application scenarios of ultrasonic spraying thermoelectric thin film

Carbon nanotube tungsten disulfide thermoelectric thin film prepared by ultrasonic spraying by Cheersonic has excellent film consistency and performance repeatability, covering multiple tracks in thermoelectric product manufacturing:

Wearable flexible thermoelectric fabric: making self powered intelligent temperature measuring fabric, capable of outputting stable electrical signals with small temperature differences, used for health monitoring wearable devices;
High precision thermoelectric sensor: fast response to temperature changes, high sensitivity, widely used in industrial temperature measurement and fire warning detection modules;
New energy thermoelectric conversion devices: improve the overall power factor of the device, efficiently complete the conversion of thermal energy into electrical energy, and apply it to building waste heat recovery and industrial waste heat power generation equipment;
Flexible semiconductor thermoelectric composite materials: assist in the research and development of the new generation of flexible thermoelectric chips, and promote the iteration and upgrading of thermoelectric material technology.

Industry supporting complete mass production solution

At present, the wearable electronics, waste heat power generation, and intelligent sensing industries are developing rapidly, and the market continues to upgrade the requirements for the uniformity and stability of carbon nanotube/thin layer tungsten disulfide thermoelectric dispersion coating. Cheersonic Ultrasonic has been deeply involved in nano precision spraying for many years, optimizing a complete set of atomization, film coating, and curing supporting processes for thermoelectric nanomaterials. We provide integrated equipment and process debugging services, providing stable and cost-effective large-scale coating solutions for thermoelectric device research and development enterprises and new material manufacturers, accelerating the industrialization and product technology upgrading of high-end thermoelectric materials.

About Cheersonic

Cheersonic is the leading developer and manufacturer of ultrasonic coating systems for applying precise, thin film coatings to protect, strengthen or smooth surfaces on parts and components for the microelectronics/electronics, alternative energy, medical and industrial markets, including specialized glass applications in construction and automotive.

Our coating solutions are environmentally-friendly, efficient and highly reliable, and enable dramatic reductions in overspray, savings in raw material, water and energy usage and provide improved process repeatability, transfer efficiency, high uniformity and reduced emissions.

If you have any technical questions, customization demands, or procurement inquiries about ultrasonic atomization nozzles, feel free to contact our professional sales and technical team for detailed parameters, customized solutions, and industry application support.
Email: market2@cheersonic.com