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Surface Active Agents

Surface Active Agents

Surfactants, named for their behavior at interfaces, positively adsorb at the interfaces of two phases, reducing interfacial tension. Their versatility as emulsifiers, detergents, and foaming agents stems from this ability. Surfactants, often termed amphiphiles, share the property of amphipathy, with molecules having both hydrophilic and hydrophobic portions. The hydrophilic part is called the head, and the hydrophobic part, including an elongated alkyl substituent, forms the tail.Surfactants...

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Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars

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Superamphiphobic Surfaces Prepared by Coating Multifunctional Nanofluids.

Pouriya Esmaeilzadeh¹, Mohammad Taghi Sadeghi¹, Alireza Bahramian²

¹Chemical Engineering collage, Iran University of Science and Technology (IUST) , Narmak, Tehran 16765-163, Iran.

ACS Applied Materials & Interfaces

|November 2, 2016

Summary

This summary is machine-generated.

Researchers developed superamphiphobic coatings using doped Barium Strontium Titanate nanoparticles and fluorochemicals. These advanced nanofluids create surfaces that repel both water and oil, offering self-cleaning properties and thermal stability.

Keywords:

barium strontium titanate (BST)carbonate rock nanofluid self-cleaning stability superamphiphobicity

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Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications

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Area of Science:

Materials Science
Surface Chemistry
Nanotechnology

Background:

Creating surfaces that repel both water and oil (superamphobicity) is a significant challenge in materials science.
Existing methods often lack durability or broad applicability for diverse liquid types.

Purpose of the Study:

To synthesize and characterize novel doped Barium Strontium Titanate (BST) nanoparticles for superamphiphobic coatings.
To evaluate the oil and water repellency of mineral surfaces coated with these nanofluids.

Main Methods:

Synthesis of Cobalt-doped (CoBST) and Cerium-doped (CeBST) Barium Strontium Titanate nanoparticles.
Formulation of nanofluids incorporating nanoparticles with fluorochemicals (PFOS and PTFE).
Coating mineral surfaces and testing superamphiphobic properties with various liquids.

Main Results:

Coated surfaces exhibited superamphiphobicity, repelling oils with surface tensions as low as 23 mN/m.
High surface tension liquids like water and ethylene glycol rolled off surfaces without tilting.
Demonstrated self-cleaning properties and thermal stability up to 180 °C.

Conclusions:

The developed CoBST and CeBST nanofluids provide effective and durable superamphiphobic coatings.
These coatings offer significant potential for self-cleaning applications in various environments.
Novel industrial applications include fracking and gas reservoir condensate management.