Nanocoating is the result of an application where nano structures build a consistent network of molecules on a surface. This entails the chemical process where the surface can be designed to become (super) hydrophobic or hydrophilic for example. Nanocoating is a growing line and some of its applications are already in use whereas many more, with great potential, are being researched on. In this article we will look at the top 8 applications of nanocoating that is currently being used.

1. Anti-corrosive coatings
2. Water proof and non-stick coatings
3. Antibacterial coatings
4. Thermal Barrier coatings
5. Anti-abrasion coatings
6. Self-healing coatings
7. Anti-reflection coatings
8. Anti-graffiti coatings

 

1. Anti-corrosive coatings

Anti-corrosive coatingAnti-corrosive coatingThis is an area where nano coatings are actively playing a role in. Numerous products can be found on the internet that are either already treated to be anti-corrosive or that can be applied on metal surfaces to make them anti corrosive. These products protect metal components against degradation due to moisture, salt spray, oxidation or exposure to a variety of environmental or industrial chemicals. Here, the coating layer added on a metal surface acts as a barrier to inhibit the contact between chemical compounds or corrosive materials. This helps improve the lifespan for metals.

 

2. Water proof and non-stick coatings

Waterproof coatingWaterproof coatingThe most fore coming application of nano coatings are without any doubt making surfaces water repellent. Also known as the “lotus effect” these coatings are easily accessible in the market. These nano coatings make it possible to make, number of surfaces like clothing, shoes, electronics, furniture, and glass, hydrophobic to name a few. As in the plant lotus the droplets of water rolls off the leaf taking dirt, insects and contamination with them. Similarly these hydrophobic coatings help in keeping surfaces cleaner saving time and at time making cleaning products obsolete.
What we also see in the market are coatings that make surfaces not stick. These coatings are of use in mould release and metals in numerous electronic applications. These coatings not only repel water but also substances like oil, dirt, and almost any liquid substance. Specially in the food packaging industry companies are working on non-stick coatings that would make problematic products like tomato ketchup and mayonnaise to just smoothly come out of the bottles without any hassle and preventing throwing away the last remaining portion.

 

3. Antibacterial coatings

Antibacterial coatingAntibacterial coatingCoatings that help surfaces inhibit or reduce the growth of microorganisms are a popular area of application for Nano coatings. Healthcare industry has been one of many areas where these coatings have been able to play a vital role in preventing infections. Furthermore these coatings are also available to be coated to products such as door handles. Antibacterial coatings can also play a vital role are places such as trams, buses and trains with a higher risk of infectious diseases being transmitted from a person to the other.
Furthermore antibacterial coatings are used in kitchens and sanitary facilities, air conditioning and ventilation systems, in food preparation and in the manufacture of packaging material. Even daily life mundane products such as the laminate flooring in our houses can now be bought that are antibacterial in property.

 

 

4. Thermal barrier coatings

Thermal barrier coatingThermal barrier coatingNano-coatings are playing an important role in the aviation and industry sector as thermal barrier coatings. These coatings are mainly applied to metallic surfaces that operate at elevated temperatures. Examples of such surfaces are aero-engine parts and gas turbines. In these surfaces the coating help the metallic surfaces to operate in higher temperatures while limiting the thermal exposure of structural components, extending part life by reducing oxidation and thermal fatigue. Furthermore these coating are also being applied in the automobile industry. They are mainly used in engine exhausts systems of high performance cars.

 

 

5. Anti-abrasion coatings

Anti-abrasion coating © K. Dobberke for Fraunhofer ISCAnti-abrasion coating © K.Dobberke for Fraunhofer ISCAbrasion is the process of wearing down or rubbing away by means of friction. Abrasion is an undesirable effect to the regular and normal use of exposure of a machine or part. Abrasion resistant coatings have been widely used to reduce or eliminate wear, extending the lifetime of products. Abrasive resistant coatings can also be used in certain environments unsuitable for lubrications. Abrasive resistant coatings are also employed to strengthen mechanical properties, such as hardness and toughness. The application of anti-abrasion coatings helps against galling, seizing and other physical damages.

 

 

 

6. Self-healing coatings

Self-healing coatings © NanobaySelf-healing coatings © NanobaySelf-healing coatings are considered as an alternative route for efficient anti-corrosion protection while maintaining a low demand in cathodic protection. Such coatings typically incorporate micro- or nano-capsules that contain film-formers and repair the coating damage when the coating is scratched. Self-healing systems have been developed for metal structures under cathodic protection using specific-film-formers sensitive to the electrical field and pH encountered in the vicinity of a default on a coated structure under cathodic protection. Some popular products incorporating self-healing coatings in the market at present can be found in the mobile phones, automotive and decorative paint markets.

 

 

 

7. Anti-reflection coatings

Anti-reflection coatingAnti-reflection coating   Often, anti-reflective coatings are used to increase transmission of an optic. This is often a valid use of an anti-reflective coating, but it should be noted that this coating does not, by definition, increase transmission. Rather, it only reduces reflections off the incident side of the surface. In some cases, absorptive anti-reflective treatments can actually reduce transmission. In the case of interference filters, an anti-reflective treatment is often superfluous. Anti-reflection coatings are mainly used in optical products like eye-wear, and improving the efficiency of solar panels.

 

 

 

8. Anti-graffiti coatings

Anti-graffiti coatingAnti-graffiti coatingMost countries state graffiti as vandalism and it also costs millions of dollars to clean them off buildings and other walls. In London alone, 200 million US$ are spent per year on this. In such situations anti-graffiti coatings are a boon to governments and private companies all over. These coatings are invisible to the naked eyes and are available in two options. The first option is where the coating can be peeled off once graffiti has been applied on it and the second one is where the coating is applied on the surface which prevents graffiti from adhering to the surface.

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