The "Durability Bottleneck" of Nano Coatings Is Being Overcome One by One
Superhydrophobic surfaces, due to their extreme water-repellent properties, show great application potential in self-cleaning, anti-icing, anti-corrosion, drag reduction and other fields. However, for a long time, traditional superhydrophobic coatings have generally faced three major bottlenecks—poor mechanical durability, complex preparation processes, and difficulty in large-scale application, which have kept them at the laboratory stage for a long time and made it hard to truly enter industrial scenarios.
Entering 2026, this situation is changing. From domestic universities to corporate patents, multiple key technological breakthroughs in nano coatings have emerged intensively, with the core direction aimed at "maintaining excellent water-repellent performance while improving mechanical strength, scalability, and environmental sustainability." As a manufacturer that has long focused on functional coatings, Kexin New Materials has sorted out several of the most representative recent advances.
Breakthrough 1: Photothermal Anti-Icing, Letting the Coating "Melt Ice by Basking in the Sun"
In aviation, power transmission, wind power, and transportation systems, icing has long been a pain point for safe operation. Traditional mechanical de-icing and chemical de-icing are energy-intensive and complex to maintain. In 2026, photothermal superhydrophobic coatings with "active heating + passive anti-icing" synergistic protection have become a research hotspot.
A study published in an international journal achieved both photothermal and superhydrophobic properties by embedding silver nanoparticle-modified multilayer graphene sheets (Ag@MGs) into the coating surface: water contact angle of about 154.5°, the coating can heat up to 80.5℃ under 200 mW/cm² illumination, ice delay of 102 seconds, and still maintains a contact angle of 152.1° after 10 freeze-thaw cycles. The principle is that silver nanoparticles generate local heating through localized surface plasmon resonance (LSPR), while the excellent thermal conductivity of graphene promotes rapid heat diffusion.
Domestic teams have also made similar progress. A bilayer superhydrophobic coating based on graphene oxide can delay icing for 528 seconds at -18℃, achieve efficient photothermal de-icing in 63 seconds, and withstand 9 anti-icing/de-icing cycles, with the contact angle still above 150°. Such technologies provide new solutions for the protection of drones, polar research equipment, high-altitude monitoring devices and other equipment in harsh environments with low temperature, high humidity, and strong wind.
Breakthrough 2: Rare Earth-Graphene Synergy, Ultra-Long-Life Self-Cleaning Coating
The core value of self-cleaning coatings lies in making building curtain walls, photovoltaic panels, and outdoor facilities "maintenance-free" or "low-maintenance." In 2026, a patent titled "Self-Cleaning Composite Coating and Its Preparation Method" (Publication No. CN121975415A) was published, representing the cutting-edge level in this direction.
Through an "organic-inorganic-hybrid" three-module design, the coating uses multi-functional nanomaterials such as tri-rare-earth co-doped TiO₂, graphene oxide-CeO₂-ZrO₂, and boron nitride nanoparticles, combined with a fluorosilicone-polyurethane dual-resin system, and undergoes plasma activation, high-energy compounding, electrostatic spraying, and gradient curing processes to form a composite coating with micro-nano rough structure, full-spectrum catalysis, UV shielding, high thermal conductivity, and strong adhesion. Its measured performance is impressive: water contact angle ≤3° (superhydrophilic self-cleaning), visible light transmittance ≥94%, QUVB accelerated aging for 3000 hours with performance retention >90%, and excellent self-cleaning, wear resistance, salt spray resistance, and long-term outdoor stability.
Breakthrough 3: Maturation of Multiple Process Routes, Making Large-Scale Preparation Possible
Whether nano coatings can be industrialized hinges on whether the preparation process can be scaled up and low-cost. A recent review systematically evaluated the pros and cons of mainstream preparation technologies such as sol-gel, dip coating, spray coating, and electrochemical deposition, providing clear guidance for scale-up paths. Studies show that nanofillers such as carbon-based materials (graphene, carbon nanotubes), metal oxides (SiO₂, TiO₂), and metal-organic frameworks (MOFs) can enhance superhydrophobicity by constructing hierarchical rough structures and reducing surface energy—this opens up space for "customization on demand" for different application scenarios.
Technology Progress Overview
| Technology Direction | Representative Performance Indicators | Potential Applications |
|---|---|---|
| Photothermal anti-icing (Ag@graphene) | Contact angle 154.5°, illumination heating 80.5℃, ice delay 102s | Aviation, power transmission, wind power |
| Photothermal anti-icing (graphene oxide bilayer) | -18℃ ice delay 528s, 63s de-icing, 9 cycles | Drones, polar equipment |
| Rare earth-graphene self-cleaning | Contact angle ≤3°, transmittance ≥94%, aging 3000h retention >90% | Curtain walls, photovoltaics, outdoor facilities |
Kexin's Perspective: The Value of Functional Nano Coatings Lies in "Scenario Matching"
These technological breakthroughs in nano coatings are exciting, but from "paper performance" to "engineering usability," there are still four practical barriers: durability, scalability, cost, and environmental sustainability. The truly professional approach is not to blindly chase a certain "parameter extreme," but to match the appropriate nano coating system according to specific scenarios—whether it is the self-cleaning needs of outdoor curtain walls, the anti-icing needs of industrial equipment, or the anti-corrosion and drag-reduction needs of metal substrates.
Kexin New Materials adheres to the idea of "determining solutions by scenario" in the field of nano coatings, and around functional needs such as superhydrophobic antifouling, self-cleaning, and anti-corrosion drag reduction, provides customers with nano coating products and construction guidance adapted to different substrates and working conditions. We are also continuously tracking the industrialization progress of frontier materials such as graphene modification and rare earth synergy, transforming the performance advantages in the laboratory into practical value that customers can use on site and use for a long time.
Further Reading
- Nano Coating Technology Principles, Preparation Processes and Multi-Field Applications
- Heavy Anti-Corrosion Coating System Design, Selection and Engineering Application
- Kexin Nano Ceramic Coating Products