Solute-Assisted Nanomaterial Coatings for Faster Uniform Assembly
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Solution Overview
Problem
Existing dip coating technologies for forming functional coatings from nano/microparticles on substrates are limited by low coating speed, high cost, and environmental impact, requiring delicate balance in substrate withdrawal and solution evaporation, and necessitate stable and well-dispersed solutions often using organic solvents or surfactants.
Innovation Solution
A method for forming nanomaterial coatings on substrates through solute-assisted assembly, involving a mixture of solvent, solute, and nanomaterials, where sonication is applied to disperse and assemble the nanomaterials onto the substrate, allowing for the use of water as a solvent without surfactants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional dip coating technology is used, then coating quality can be maintained, but coating speed is very low
Solution Approach 1:
The patent applies ultrasonic vibration to the liquid coating solution to enhance the deposition process. The ultrasonic waves create cavitation and mechanical agitation that promote uniform nanomaterial distribution and accelerate the assembly rate on the substrate, thereby increasing coating speed while maintaining coating quality through controlled vibration parameters
Solution Approach 2:
The patent modifies the coating solution parameters by adjusting solute concentration, pH value, and temperature to optimize the deposition kinetics. These parameter changes enable faster assembly rates while maintaining coating uniformity and quality, resolving the contradiction between speed and reliability
2Reliability
If organic solvents or surfactants are used, then solution stability and uniform film formation are achieved, but environmental friendliness deteriorates and post-treatment is required
Solution Approach 1:
The patent extracts and eliminates harmful organic solvents and surfactants from the coating system. By formulating a water-based solution with optimized solute concentration and pH, the patent achieves solution stability and uniform film formation without requiring environmentally harmful additives, thereby removing the harmful factors while maintaining reliability
Solution Approach 2:
The patent changes the chemical parameters of the coating solution by adjusting pH, ionic strength, and solute composition to enhance solution stability inherently. These parameter modifications allow the system to achieve uniform film formation without surfactants or organic solvents, eliminating environmental harm while maintaining coating quality
3Productivity
If substrate withdrawal speed is increased, then coating speed improves, but stable deposition becomes difficult to maintain
Solution Approach 1:
The patent introduces ultrasonic vibration to the coating system, which creates acoustic radiation pressure and enhances mass transfer at the substrate-solution interface. This mechanical vibration effect stabilizes the deposition process by preventing premature aggregation of nanomaterials, allowing higher substrate withdrawal speeds while maintaining deposition stability and uniformity
Solution Approach 2:
The patent uses solute particles and ultrasonic waves as intermediaries to mediate the deposition process. These intermediaries facilitate controlled nanomaterial assembly on the substrate during rapid withdrawal, acting as transfer agents that maintain deposition stability even at high coating speeds by preventing direct aggregation and ensuring uniform distribution
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables high-quality, uniform, and durable coatings on various substrates, including hydrophilic and hydrophobic materials, at a higher speed and lower cost, while being environmentally friendly by eliminating the need for organic solvents and surfactants.
Implementation Method 1
applying sonication to the mixture
Data Source
AI summary
A method for forming a nanomaterial coating through solute-assisted assembly is provided. The method includes steps of: providing a mixture comprising a solvent, a solute, and a nanomaterial or particle; applying sonication to the mixture; and contacting a substrate with the mixture so as to form a coating of the nanomaterial or the particle onto the substrate. The solute is selected from a salt, a sugar, an acid, a base, or a combination thereof. The present disclosure also provides the resulting products comprising the nanomaterial coating for flexible electronics and functional textiles.