Register for an account

X

Enter your name and email address below.

Your email address is used to log in and will not be shared or sold. Read our privacy policy.

X

Website access code

Enter your access code into the form field below.

If you are a Zinio, Nook, Kindle, Apple, or Google Play subscriber, you can enter your website access code to gain subscriber access. Your website access code is located in the upper right corner of the Table of Contents page of your digital edition.

Technology

Layer Cake of Nanoparticles Could Clean Up Oil Spills

Durable coating over a stainless steel mesh could be scaled up for huge messes.

By Leah ShafferNovember 30, 2015 6:00 AM
Oil Spill - Shutterstock
(Credit: Signature Message/Shutterstock)

Newsletter

Sign up for our email newsletter for the latest science news

Cleaning oil spills could be as easy as scraping frosting off a cake, thanks to a nanoparticle coating developed by Philip Brown and Bharat Bhushan, engineers at the Ohio State University.

Traditional chemicals that disperse oil spills can harm marine life more than the oil itself. Instead, environmentalists might one day use specially coated nets that separate oil from water. The coating, announced in March, covers a stainless steel mesh and works by first adding silica nanoparticles to create a bumpy, liquid-repelling surface. Next comes a polymer layer that acts as a binder, followed by a layer of surfactant, a molecule with two key parts: one that loves water and another that hates oil. The surfactant’s different response to the two liquids allows the coated mesh to separate them. When Brown and Bhushan tested the mesh, water slid through while oil remained trapped on top.

Nanoparticle Oil Spill Cleanup Figure - OSU
Thanks to a special coating on this stainless steel mesh, a mixture of oil and water is easily separated. The technology could be scaled up for bigger projects, such as cleaning oil spills. (Credit: Philip S. Brown and Bharat Bhushan/Ohio State University)

The layered approach helps the coating components bind and function better, and the more durable the coating, the more affordable it is to scale up for major oil spills. Any way you bake it, this layer cake of tiny particles could provide durable filters for big messes.

2 Free Articles Left

Want it all? Get unlimited access when you subscribe.

Subscribe

Already a subscriber? Register or Log In

Want unlimited access?

Subscribe today and save 70%

Subscribe

Already a subscriber? Register or Log In