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What happens when you use nanomaterials to make barrier coatings?

涂层是一种非常成熟的保护表面免受环境影响的方法,苛刻的物质或易于氧化表面的物质。但是当你使用纳米材料制造阻隔涂层时会发生什么?


  纳米材料为阻隔涂层带来的ROYAL OAK ROSE GOLD REPLICA有很多好处  ; 和什么涂层是由通常依赖于表面(其中考虑到的表面的几何形状)周围需要顺应性的程度,材料的组合物的保护,对涂层会在环境中,并且表面需要保护的有害分子。阻隔涂层是一种应用领域,其中已发现一系列纳米材料具有广泛的用途,具有多种形式和一系列特定应用/环境。


纳米材料可用于形成阻挡涂层的方式有很多种。一些最常见的方法包括使用物理气相沉积(PVD),化学气相沉积(CVD)和原子层沉积(ALD)方法以及配制的油墨自下而上制造涂层。


One of the main reasons that nanomaterials have become an option in barrier coating applications is due to their high stability. Whilst it can’t be said for all nanomaterials—as nanomaterials is a very wide-ranging field that encompasses both soft and hard materials—there are plenty of options out there which are highly stable under many conditions. Aside from being stable to many conventional environments, including those where water and moisture can cause corrosion to a surface, many are resistant to high temperatures, highly corrosive chemicals and high pressures. In addition to the inherent barrier properties brought about by their high stability, there are a select few which also exhibit a high degree of flexibility; and the combination of these barrier and flexibility properties make them an ideal choice for conformal-style coatings that can often mould to complex geometries. Additionally, there are nanomaterials which can be formulated into inks, which in turn can then either be printed, painted or coating on to a surface (depending on the area of the surface) to provide barrier properties.


So what applications do nanotechnology-based barrier coatings find themselves in?


There are many. Anti-corrosion and anti-fouling coatings are some of the most recent promising areas, with materials, such as graphene, being able to provide a stable barrier against water and moisture on the hulls of boats, and as a barrier against biological matter in medical prosthetics. There are also many nanomaterials, from nanosized clays to thin film inorganic oxides, that can be added into polymer matrices to produce many types of nanocomposites, which have use across the food packaging industry to keep out air and harmful bacteria. In food packaging applications, another benefit often seen is that the nanocomposites have anti-microbial properties, so they can better protect the internal environment inside the packaging and provide a barrier to the outside environment. Essentially any surface or internal environment (if encased) can be protected from air, moisture, water, and many other hazardous substances using nanomaterials in the coating.


Many of the inorganic-based nanomaterials (and graphene) also have a very high resistance to temperature. This is a very useful property in oil and gas applications, as well as in engines and turbines. Not only can nanomaterial-based coatings provide a thermal barrier to the high temperatures in oilfield and downhole drilling applications, they can double up as a barrier to the common corrosive substances found in these environments, such as hydrogen sulphide gas, and better protect and increase the longevity of the equipment used. Other applications where nanomaterials can provide a thermal barrier include aerospace engines and industrial gas turbines, where temperatures can reach above 1300 °C. In these high temperature environments, nanotechnology barrier coatings can reduce the thermal conduction in these systems and lower the overall operational temperatures, thus minimizing the possibility of the system overheating and/or damaging the surrounding parts.


Liam Critchely撰写

» Author: Liam Critchley

» Publication Date: 12/12/2018

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This project has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement n° [605658].

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