The current state-of-the-art superhydrophobic surface layer obtained through casting methods is very thin and can be easily abraded or damaged. Moreover, the top surface layer of the prepared bulk material is not superhydrophobic and needs to be removed to expose the inner superhydrophobic material. This removal step is difficult if the surface is uneven and 3D shaped. The invented material has been shown to be superior to the current state-of-the-art. It is superhydrophobic as prepared and highly durable against mechanical abrasion.
This invention describes a sand-casting method using polymers and silicon oxide nanoparticles to prepare a superhydrophobic coating. Thus far, it has been used as a surface coating for blood pumps and catheters and has been shown to reduce drag stress interaction with blood to reduce blood damage. It prevents protein adsorption and blood lysis.
This method of coating has been tested on rigid polymer/plastic and rubber and may also be used on metals. Moreover, it is flexible and customizable into objects of complex 3D geometries. Therefore, it is an excellent coating for any application.
The global market for hydrophobic coatings is expected to increase from $1.3 billion in 2015 to more than $1.8 billion in 2020, growing at a five-year compound annual growth rate (CAGR) of 6.4% from 2015 through 2020. This IP is superior to the current state-of-the-art and addresses the problems faced by the current state-of-the-art.