Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > New method applies pesticides in nanofibers to keep chemicals on target

Margaret Frey, left, associate professor of fiber science and apparel design, and research associate Chunhui Xiang have developed a method to deliver pesticides via nanofibers.
Margaret Frey, left, associate professor of fiber science and apparel design, and research associate Chunhui Xiang have developed a method to deliver pesticides via nanofibers.

Abstract:
By Sheri Hall: To prevent pesticides from drifting away and potentially posing risks to the environment, Cornell researchers have devised a solution: Apply the pesticides by encapsulating them in biodegradable nanofibers, which keeps then intact until needed and minimizes loss to drift or being washed away from the plants they are intended to protect.

New method applies pesticides in nanofibers to keep chemicals on target

Ithaca, NY | Posted on March 27th, 2009

"Our technology will decrease the amount of pesticides applied, which is good for the environment," said research associate Chunhui Xiang, Ph.D. '08, who worked on the new technology with Margaret Frey, associate professor of fiber science and apparel design in the College of Human Ecology, as well as Cornell experts in horticultural sciences and entomology. "All the materials are biodegradable and from renewable resources."

The new technology also extends how long the pesticides remain effective and improves the safety of applications. As the fiber biodegrades, the chemicals are slowly released into the soil.

Xiang, who was named the outstanding student of the American Chemical Society Division for Cellulose and Renewable Materials last year, presented the material at the American Chemical Society annual meeting, March 22-26, in Salt Lake City.

"The chemical is protected, so it won't degrade from being exposed to air and water," Frey said. "It also keeps the chemical where it needs to be and allows it to time-release."

The delivery system is created by electrospinning solutions of cellulose, the pesticide and PLA -- a polymer derived from cornstarch.

For the initial trials, Xiang measured chemical delivery in the laboratory over a 16-week period. The individual fibers tested had a diameter more than 100 times finer than a human hair and could hold up to 50 percent of their weight in agricultural chemicals. The results showed that the chemical was released gradually over the entire four-month period, and that the rate of release could be adjusted by changing the composition of the fiber. The chemical itself did not degrade.

To find out if pesticides delivered this way could really work, professor Michael Hoffmann's entomology group planted 4-by-4 millimeter squares of pesticide-loaded fabrics with pole bean seeds in greenhouses on campus. Pesticide delivered from the fabric effectively controlled white flies on the bean plants.

Meanwhile, professor Alan Taylor's group in horticultural science is investigating use of these fibers to deliver pesticides with seed coating technologies. The team is also considering this system for direct application to plant leaves or stalks.

"It's the tip of the iceberg," Frey said.

This research is funded in part by federal Hatch funds, administered by the Cornell University Agricultural Experiment Station.

Sheri Hall is assistant communications director for the College of Human Ecology.

####

About Cornell University
Once called "the first American university" by educational historian Frederick Rudolph, Cornell University represents a distinctive mix of eminent scholarship and democratic ideals. Adding practical subjects to the classics and admitting qualified students regardless of nationality, race, social circumstance, gender, or religion was quite a departure when Cornell was founded in 1865.

Contacts:
Media Contact:
Nicola Pytell
(607) 254-6236


Cornell Chronicle:
Susan Lang
(607) 255-3613

Copyright © Cornell University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Video captures bubble-blowing battery in action: Researchers propose how bubbles form, could lead to smaller lithium-air batteries April 26th, 2017

New Product Nanoparticle preparation from Intertronics with new Thinky NP-100 Nano Pulveriser April 26th, 2017

California Research Alliance by BASF establishes more than 25 research projects in three years April 26th, 2017

Affordable STM32 Cloud-Connectable Kit from STMicroelectronics Puts More Features On-Board for Fast and Flexible IoT-Device Development April 26th, 2017

Announcements

Video captures bubble-blowing battery in action: Researchers propose how bubbles form, could lead to smaller lithium-air batteries April 26th, 2017

New Product Nanoparticle preparation from Intertronics with new Thinky NP-100 Nano Pulveriser April 26th, 2017

California Research Alliance by BASF establishes more than 25 research projects in three years April 26th, 2017

Affordable STM32 Cloud-Connectable Kit from STMicroelectronics Puts More Features On-Board for Fast and Flexible IoT-Device Development April 26th, 2017

Food/Agriculture/Supplements

New technology could offer cheaper, faster food testing: Specialized droplets interact with bacteria and can be analyzed using a smartphone April 7th, 2017

Meta-lenses bring benchtop performance to small, hand-held spectrometer: Game-changing nanostructure-based lenses allow smaller devices, increased functionality February 9th, 2017

PCATDES Starts Field Testing of Photocatalytic Reactors in South East Asia December 28th, 2016

News from Quorum: The Agricultural Research Service of the USDA uses a Quorum Cryo-SEM preparation system for the study of mites, ticks and other soft bodied organisms November 22nd, 2016

Environment

NanoMONITOR shares its latest developments concerning the NanoMONITOR Software and the Monitoring stations April 21st, 2017

Wood filter removes toxic dye from water April 21st, 2017

Making Batteries From Waste Glass Bottles: UCR researchers are turning glass bottles into high performance lithium-ion batteries for electric vehicles and personal electronics April 19th, 2017

Shedding light on the absorption of light by titanium dioxide April 14th, 2017

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project