YPF has been granted a patent for a method to prepare super-hydrophobic membranes. The process involves cleaning a metal mesh, modifying its surface to increase hydrophilicity, coating it with a hydrophobic substance, and drying it. The resulting membrane has a contact angle of 162°. GlobalData’s report on YPF gives a 360-degree view of the company including its patenting strategy. Buy the report here.
According to GlobalData’s company profile on YPF, was a key innovation area identified from patents. YPF's grant share as of May 2024 was 19%. Grant share is based on the ratio of number of grants to total number of patents.
Super-hydrophobic membrane preparation method
A recently granted patent (Publication Number: US11998877B2) discloses a method for preparing a super-hydrophobic membrane. The method involves several steps, including providing a metal mesh, cleaning it with an organic solvent, subjecting it to a surface modification treatment using an electrochemical anodizing process in an aqueous NaOH solution, treating it with a suspension of nanoparticulated oxides comprising SiO2, coating it with a hydrophobic organic substance, and drying it to obtain the super-hydrophobic membrane. The surface modification treatment with nanoparticulated oxides increases the number of hydroxyl groups capable of reacting with the hydrophobic silylated reagent, resulting in a super-hydrophobic membrane with a contact angle of 162°.
The patent also specifies that the metal mesh used can be an alloy such as brass, bronze, tin bronze, or stainless steel. Additionally, the hydrophobic silylated reagent for coating the metal mesh can be selected from options like hexadecyltrimethoxysilane (HDTMS) and octadecyltrimethoxysilane. The drying process in the method is carried out at a temperature ranging from 90°C to 210°C, with a specific temperature of 110°C mentioned in one of the claims. Furthermore, the drying is done at a pressure between 5 and 40 mmHg. These detailed steps and parameters outlined in the patent aim to facilitate the preparation of super-hydrophobic membranes with specific characteristics and properties, offering potential applications in various industries requiring water-repellent surfaces.
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