Bioprotein creates two-dimensional stretchable materials

Bioprotein creates two-dimensional stretchable materials

Credit: Porco Dorson, Pennsylvania

Nature creates layered materials like bone and mother-of-pearl that become less sensitive to imperfections as they grow. Using biomimetic proteins engraved on squid ring teeth, the researchers have now created two-dimensional composites that are both fracture-resistant and highly stretchable.

“Researchers have rarely reported this interface property of bone and nacre because it has been difficult to measure experimentally,” said Melik Demirel, Lloyd, and Dorothy Foehr Huck Chair in Biomimetics and Director of the Center for Advanced Fiber Technologies at Penn State.

2D composite Materials It consists of atom-thick layers of a solid material, such as graphene or maxene – usually a transition metal carbide, nitride or carbonitride – separated by layers of something to stick the layers together. While the larger pieces of graphene or MXenes have aggregate properties, the strength of the 2D composites comes from the interfacial properties.

“Because we use an interfacial material that we can modify by repeating the sequences, we can adjust the properties,” Demirel said. “We can make it very flexible and very robust at the same time.”

Using biomimetic proteins modeled on squid ring teeth, the researchers created two-dimensional composites that are both fracture-resistant and highly stretchable. Credit: Porco Dorson, Pennsylvania

He noted that materials can also have unique thermal conductivity systems or properties that spread heat in one direction with a force greater than 90 degrees. The results of this work were published today (25 July) in Proceedings of the National Academy of Sciences.

“This material would be great for running shoe insoles,” Demirel said. “It can cool the foot and repeated flexing will not break the sole.”

These 2D composites can be used for flexible circuit boards, wearable devices and other equipment that requires strength and flexibility.

According to Demirel, the traditional continuum theory does not explain why these materials are strong and flexible, but simulations have shown that the interface is important. What appears to happen is that with a higher proportion of the material constituting the interface, the interface breaks in places when the material is under stress, but the material as a whole does not.

“The user interface But the materials don’t break down, Demirel said. “We expected them to become compatible, but all of a sudden it’s not just compatible anymore, but it’s incredibly extensible.”

Others working on this project from Penn State include Mert Vural, postdoctoral fellow. Tarek Mazeed is a postdoctoral fellow. Oguzan Kulak, graduate student; and Reginald F. Hamilton, associate professor of engineering and mechanics.

Dong Li and Huajian Zhao, professor of mechanics and . also worked on this research Aviation Engineeringboth at Nanyang Technological University, Singapore.

Self-assembled biomimetic compounds have unusual electrical properties

more information:
Stretchable molecular compounds inspired by 2D materials and tandem repeat proteins, Proceedings of the National Academy of Sciences (2022). DOI: 10.1073/pnas.2120021119.

the quote: Bioprotein Creates Stretchable 2D Materials (2022, July 25) Retrieved on July 26, 2022 from

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