Nav: Home

Successful synthesis of threaded polymers

January 21, 2016

Researchers have synthesized a material with a distinctive structure involving woven organic polymers that provide it with special elastic properties. Covalent organic frameworks (COFs) are structures created with organic building blocks that link together. They are appealing because their low density and high porosity has many promising applications, such as for storing gas or for optoelectronics, but previously, synthesized COFs have been too rigid. Creating more flexible COFs, those that resemble woven fabrics, has been challenging on a molecular level. The synthesis method developed by Yuzhong Liu et al. could lead to a new field of material science. First, the authors created a copper-based framework. They added organic compounds that "link" together, interlacing 1D units to make 2D and 3D structures. Each of the threads making up the framework is a helix, and the helices are covalently linked at "points of registry." These points allow the threads many degrees of flexibility without collapsing the overall structure. Upon removal of the copper ions, the structure remains intact. The threads are able to slide against each other, increasing the elasticity of the material tenfold. Adding copper solution results in complete restoration of the original material. A Perspective by Enrique Gutierrez-Puebla provides more context about this new woven material and its potential applications.
-end-


American Association for the Advancement of Science

Related Copper Articles:

Copper-bottomed deposits
Researchers at UNIGE have studied over 100,000 combinations to establish the depth and number of years required for magma to produce a given amount of copper.
Copper mining with bioactive substances derived from bacteria
Chile is one of the most important suppliers of copper to German industry.
Modeling magma to find copper
About 70 percent of the copper comes from deposits formed several million years ago during events of magma degassing within the Earth's crust just above subduction zones.
Copper essential for burning fat, researchers find
UC Berkeley and Berkeley Lab researchers found that copper is essential to breaking down fat into smaller lipids that can circulate in the blood and be burned for energy.
Copper is key in burning fat
A new study led by a Berkeley Lab scientist and UC Berkeley professor establishes for the first time copper's role in fat metabolism, further burnishing the metal's reputation as an essential nutrient for human physiology.
More Copper News and Copper Current Events

Best Science Podcasts 2019

We have hand picked the best science podcasts for 2019. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Teaching For Better Humans
More than test scores or good grades — what do kids need to prepare them for the future? This hour, guest host Manoush Zomorodi and TED speakers explore how to help children grow into better humans, in and out of the classroom. Guests include educators Olympia Della Flora and Liz Kleinrock, psychologist Thomas Curran, and writer Jacqueline Woodson.
Now Playing: Science for the People

#534 Bacteria are Coming for Your OJ
What makes breakfast, breakfast? Well, according to every movie and TV show we've ever seen, a big glass of orange juice is basically required. But our morning grapefruit might be in danger. Why? Citrus greening, a bacteria carried by a bug, has infected 90% of the citrus groves in Florida. It's coming for your OJ. We'll talk with University of Maryland plant virologist Anne Simon about ways to stop the citrus killer, and with science writer and journalist Maryn McKenna about why throwing antibiotics at the problem is probably not the solution. Related links: A Review of the Citrus Greening...