Write a comment
Some engineered living materials can combine the strength of run-of-the-mill building materials with the responsiveness of living systems. Think self-healing concrete, paint that changes color when a specific chemical is detected or material that could reproduce and fill in a crack when one forms. This would revolutionize construction and maintenance, with wide-reaching economic and environmenta Some engineered living materials can combine the strength of run-of-the-mill building materials with the responsiveness of living systems. Think self-healing concrete, paint that changes color when a specific chemical is detected or material that could reproduce and fill in a crack when one forms. This would revolutionize construction and maintenance, with wide-reaching economic and environmental implications.
Seeing this new category of adaptive materials on consumer shelves may be a ways off. Still, critical early research from the University of Minnesota sheds new light on this exciting advancement, which shows promise beyond building materials, including biomedical applications.
In a new study in Nature Communications, researchers from the College of Biological Sciences demonstrate how to transform silica - a common material used in plaster and other construction materials - into a self-assembling, dynamic and resilient material.
Currently, the majority of engineered living materials rely on adding a living component into a material. While this additive-approach has benefits, it falls short of the aspirational material - a product that grows, self-organizes, and heals itself. Other researchers were able to engineer a bacteria to produce the target material, but it could only survive in ideal lab conditions. That wouldn't cut it in real-world applications.
Researchers, led by Claudia Schmidt-Dannert, a Distinguished McKnight Professor in the Department of Biochemistry, Molecular Biology and Biophysics, used a well-studied and benign bacteria, Bacillus subtilis, which goes dormant in unfavorable conditions and springs to life when conditions are favorable for growth. This trait made it a strong candidate as future products would eventually need to be shelf stable and easily activated. The research team then engineered the bacteria and studied the optimal approach to integrate it into the silica structure.
"The first time we saw that the bacteria and the silica were cross-linking and forming a rigid material was pivotal. At that moment, we knew it was working," says Schmidt-Dannert.
The findings provide a framework for designing novel engineered living materials for coatings and plasters, key building materials.
Schmidt-Dannert's research team is beginning to look at new starting materials. "We're now interested in going beyond silica, using different cells - maybe even multiple cell types - to develop novel engineered living materials for a range of applications."
The research was funded by the Department of Defense - Defense Advanced Research Project Agency - Engineered Living Materials Program (Contract number HR0011-17-2-0038).
Research Report: "Engineering Bacillus subtilis for the formation of a durable living biocomposite material"
Related Links
University of Minnesota
Space Technology News - Applications and Research
|
| Tweet |
| Thanks for being there;
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 Monthly Supporter
$5+ Billed Monthly |  | SpaceDaily Contributor
$5 Billed Once credit card or paypal |
Selective separation could help alleviate critical metals shortage
Boston MA (SPX) Dec 21, 2021
New processing methods developed by MIT researchers could help ease looming shortages of the essential metals that power everything from phones to automotive batteries, by making it easier to separate these rare metals from mining ores and recycled materials. Selective adjustments within a chemical process called sulfidation allowed professor of metallurgy Antoine Allanore and his graduate student Caspar Stinn to successfully target and separate rare metals, such as the cobalt in a lithium-ion bat ... read more