Silica nanoparticles make wool even better

By Darren QuickThe silica nanoparticle coating changes the surface of the wool to make it more water abso...

Already regarded as a “wonder fabric” for its lightness, softness, warmth even when wet, and other qualities, scientists from China say they have been able to improve on the natural properties of wool. They say their discovery could give wool a “brain,” placing it among other “smart” fabrics that shake off wrinkles, shrinkage and “breathe” to release perspiration.

Wool’s natural water-repellency also acts as a barrier to enhanced features such as anti-wrinkle, anti-shrinkage finishing and dyeing. This property also hinders its ability to absorb moisture and makes wool garments feel sweaty.

Although scientists have developed treatments that make wool more hydrophilic, or water-absorbing, they may not last long, may damage the fabric, and are not environmentally-friendly.

By coating the wool with an ultrathin silica layer the scientists found they were able to make the wool more water-absorbing without the problems associated with existing treatments. The coating is made from silica nanoparticles 1/50,000th the width of a human hair. The particles altered both the surface roughness and surface energy of the fiber and endowed the wool fabrics with excellent water absorption. The new layer does not affect wool’s color or texture and can withstand dry cleaning, the scientists note.

The study, “Fabricating Superhydrophilic Wool Fabrics,” detailing the scientists’ research appears in ACS’ bi-weekly journal, Langmuir.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s