Subscribe free to our newsletters via your
. 24/7 Space News .




TECH SPACE
MatSE researchers develop inexpensive hydrolyzable polymer
by Rick Kubetz
Champaign IL (SPX) Dec 03, 2014


Jianjun Cheng.

Researchers at the University of Illinois at Urbana-Champaign have figured out how to reverse the characteristics of a key bonding material-polyurea-providing an inexpensive alternative for a broad number of applications, such as drug delivery, tissue engineering, and packaging.

"Polymers with transient stability in aqueous solution, also known as hydrolyzable polymers, have been applied in many biomedical applications, such as in the design of drug delivery systems, scaffolds for tissue regeneration, surgical sutures, and transient medical devices and implants," explained Jianjun Cheng, an associate professor of materials science and engineering at Illinois.

"Polyurea materials are widely used in our daily life as coating, painting, and adhesive materials. The highly inert urea bond makes the inexpensive polymer extremely stable, a property that is suitable for some long-lasting applications."

Through some inventive chemistry, Cheng and his colleagues have developed a class of "hindered urea bond-containing polymeric materials" or "poly(hindered urea)s" (PHUs)-cheap polymers that can be designed to degrade over a specified time period, making them potentially useful in biomedical and agricultural applications.

"While conventional polyurea are very stable against hydrolysis, PHUs can be completely hydrolyzed within a few days," Cheng added.

"Since 'hindrance' is the cause of the bond destabilization, the hydrolysis kinetics of PHUs can be easily tuned as needed for a specific application. They can potentially be environmentally friendly green and sustainable materials as well."

"Polyurea usually contain ester and other hydrolyzable bonds, such as anhydride, acetal, ketal, or imine, in their backbone structures," said Hanze Ying, a graduate student in Cheng's research group and first author of the paper published in the Journal of American Chemical Society.

"In this study, we demonstrated the potential of PHUs for the design of water degradable polymeric materials that can be easily synthesized by mixing multifunctional bulky amines and isocyanates, expanding the family of hydrolyzable polymers."

"Hydrolyzable polymers have also been applied in the design of controlled release systems in agriculture and food industries and used as degradable, environmentally friendly plastics and packaging materials," Cheng said.

"These applications usually require short functioning time, complete degradation and clearance of materials after their use."

According to the researchers, the new PHUs potentially have great advantages over many other hydrolyzable polymers. PHUs can be made with inexpensive chemical precursors in ambient conditions via simple and clean chemistry with no catalyst or by-products, making it possible for end-users to control the copolymer recipe for specific use without the need of complicated synthesis apparatus.


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

.


Related Links
Engineering at University of Illinois
Space Technology News - Applications and Research






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





TECH SPACE
Penn Research Shows Way to Design 'Digital' Metamaterials
University Park PA (SPX) Dec 03, 2014
Metamaterials, precisely designed composite materials that have properties not found in natural ones, could be used to make light-bending invisibility cloaks, flat lenses and other otherwise impossible devices. Figuring out the necessary composition and internal structure to create these unusual effects is a challenge but new research from the University of Pennsylvania presents a way of s ... read more


TECH SPACE
Carnegie Mellon Unveils Lunar Rover "Andy"

Why we should mine the moon

Young Volcanoes on the Moon

Russia Preparing Joint Moon Exploration Agreement With EU

TECH SPACE
Red Planet's Mystery

Meteorite From Mars Contains Alien Biomass

Traces of possible Martian biological activity inside a meteorite

Meteorite stirs life-on-Mars debate

TECH SPACE
Orion flight marks 'milestone' for US space program: NASA

Orion launch is trial by fire for Apollo-era heat shield

NASA's Orion pushes boundaries of human spaceflight

Pop culture artifacts aboard Orion spacecraft

TECH SPACE
Service module of China's returned lunar orbiter reaches L2 point

China Launches Second Disaster Relief Satellite

China expects to introduce space law around 2020

China launches new remote sensing satellite

TECH SPACE
ISS Enables Interplanetary Space Exploration

NASA's CATS Eyes Clouds, Smoke and Dust from the Space Station

3-D Printer Creates First Object in Space on ISS

Soyuz docks at Space Station; Expedition 42 joins crew

TECH SPACE
Japan launches rocket carrying asteroid probe

Go-ahead given for Ariane 5 dual-payload mission

Ariane 5 delivers DIRECTV-14 and GSAT-16 to orbit

Launch of European Ariane-5 Space Rocket From Kourou Postponed

TECH SPACE
'Mirage Earth' exoplanets may have burned away chances for life

Stardust Not Likely to Block Planet Portraits

Finding infant earths and potential life just got easier

Ground-based detection of exoplanets

TECH SPACE
Chemists fabricate novel rewritable paper

Space travel is a bit safer than expected

Penn Research Shows Way to Design 'Digital' Metamaterials

MatSE researchers develop inexpensive hydrolyzable polymer




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.