Site Meter

Water-Harvesting Cotton Could Help Sustain Agriculture in Arid Places

by , 01/22/13   filed under: Eco-Textiles, Wearable Technology

deserts, water conservation, eco-friendly textiles, eco-textiles, sustainable textiles, cotton, Eindhoven University of Technology, Hong Kong Polytechnic University, wearable technology, eco-fashion, sustainable fashion, green fashion, ethical fashion, sustainable style, biomimicry, agriculture

Photo by Shutterstock

In arid areas, clean flowing water is always in short supply. However, once temperatures cool at night, mists and fogs nourish plant and animal life. Inspired by species of beetles and spiders that have adapted to gather droplets from the air, a team from the Eindhoven University of Technology (TU/e) and the Hong Kong Polytechnic University (PolyU) have developed a cotton fabric coated with a special polymer that collects and retains moisture. The team, who will publish their results in the journal, Advanced Materials later this month, found that with the coating the fabric was able to absorb 340% of its own weight as compared to 18% without the polymer. Up to 93 degrees Fahrenheit, the material strongly attracts water. Once above that threshold, the microstructure changes, becoming completely closed and releasing pure water wherever it is placed.

deserts, water conservation, eco-friendly textiles, eco-textiles, sustainable textiles, cotton, Eindhoven University of Technology, Hong Kong Polytechnic University, wearable technology, eco-fashion, sustainable fashion, green fashion, ethical fashion, sustainable style, biomimicry, agriculture

Photo by Shutterstock

The cotton coated with the PNIPAAm compound has the further advantage of also being inexpensive. As a basic material, cotton can be grown and processed locally, and the coating can be added for roughly 12% of the entire cost of production under current conditions. Able to be placed directly on the ground to irrigate plants, the coated cotton does not need to rely on wind to drive moisture collection.

Researchers are also considering altering the the fabric for use in camping equipment and sportswear. Led by John Xin at PolyU and Dr. Catarina Esteves at TU/e, the scientists plan to further maximize the efficacy of the material and expect to be able to adjust the temperature at which the material switches from a water-collecting to a water-releasing state. The coated cotton has great implications for irrigation and hydration of arid regions, eliminating the need to transport water over long distances, purification systems, or containers.

+ Press Release

+ Eindhoven University of Technology

[Via ScienceDaily]

Related Posts

One Response to “Water-Harvesting Cotton Could Help Sustain Agriculture in Arid Places”

  1. LeonardDikobe says:

    This clearly is positive science. Certainly a must for further reading, the possibilities are huge with technology like this. The expanding desert margins may just become history!!!

Leave a Comment

Please keep your comments relevant to this blog entry. Email addresses are never displayed, but they are required to confirm your comments.

Please note that gratuitous links to your site are viewed as spam and may result in removed comments.

Add your comments

NEW USER

Sign me up for weekly Ecouterre updates

Let's make sure you're a real person:

CURRENT USERS LOGIN

Lost your password?