Related Experiment Video
Updated: May 16, 2026
09:01
A Protocol for the Production of Gliadin-cyanoacrylate Nanoparticles for Hydrophilic Coating
Published on: July 8, 2016
7.3K
Long-Lasting Simultaneously Hydrophilic/Oleophobic Behavior of a Nanometer-Thick Ionic Liquid Coating
Alan Tirado1, Newt Kouma1, Anumita Kumari2
1Department of Chemical & Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States.
Langmuir : the ACS Journal of Surfaces and Colloids
|December 2, 2025
Summary
Researchers developed a novel ionic liquid coating for surfaces that repel oil while attracting water. This stable, thin coating offers durable antifogging and detergent-free cleaning properties, overcoming limitations of traditional materials.
Area of Science:
- Materials Science
- Surface Chemistry
- Nanotechnology
Background:
- Surfaces with selective wettability (preferring water over oil) are crucial for applications like oil/water separation and self-cleaning technologies.
- Existing solutions often involve complex fluoropolymer coatings that degrade over time, limiting their practical utility.
Purpose of the Study:
- To develop a stable, functionalized coating with tunable wettability using ionic liquids.
- To create surfaces that are highly oleophobic yet hydrophilic for advanced applications.
Main Methods:
- Fabrication of a nanometer-thick coating using a functionalized ionic liquid with fluorinated segments and polar end-groups on silica substrates.
- Characterization of surface wettability using contact angle measurements for water and oil.
- Assessment of coating stability and performance in antifogging and detergent-free cleaning applications.
Main Results:
- The ionic liquid coating demonstrated strong oleophobicity and maintained a low water contact angle (<10°).
- The coating exhibited stable oleophobicity upon prolonged exposure, attributed to its rigid structure and reduced chain mobility.
- The developed surfaces successfully provided long-term antifogging and detergent-free cleaning functionalities.
Conclusions:
- Functionalized ionic liquids offer a promising route to engineer surfaces with controlled, unconventional wettability.
- The developed coating technology addresses the limitations of conventional materials, paving the way for advanced surface applications.
- This research highlights the potential of ionic liquids in creating robust, high-performance surfaces for diverse technological needs.
More Related Videos
07:37TiO2-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method
Published on: April 26, 2017
10.5K
08:02Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars
Published on: February 11, 2020
9.3K
Related Concept Videos
01:07Cohesion
Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a surface,...
On a surface,...
03:13Intermolecular Forces
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
03:22Colloids
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
01:30The Electrical Double Layer
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
01:29The Colloidal State
The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called the...
01:30Micelles
Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...