Home Science Scientists Develop a Wolverine Inspired Self-Healing Material

Scientists Develop a Wolverine Inspired Self-Healing Material

Scientists have now developed a transparent, self-healing, highly stretchable conductive material they say was inspired by Wolverine. The material can be electrically activated to power artificial muscles and could also be used to improve batteries, electronic devices, and robots.

The researcher’s findings have been published in the journal Advanced Material. It is the first time scientists have been able to create an ionic conductor (materials that ions can flow through, that is transparent, mechanically stretchable, and is self-healing).

Illustration showing new self-healing material. (Image: via University of California)
Illustration showing the new self-healing material. (Image: University of California)

The University of California, which had several scientists working on the project, wrote that it has potential applications in a wide range of fields. This would include giving “robots the ability to self-heal after mechanical failure,” or could “extend the lifetime of lithium ion batteries used in electronics and electric cars,” and could also “improve biosensors used in the medical field and environmental monitoring.”

Chao Wang, an adjunct assistant professor of chemistry and one of the authors of the paper, said in a statement:

The project combines the research areas of self-healing materials and ionic conductors. Wang’s love of Wolverine (the comic book character who has the ability to self-heal) is what drove his interest in self-healing materials.

Ionic conductors are a class of materials that have key roles in energy storage, solar energy conversion, sensors, and electronic devices.

Christoph Keplinger, an assistant professor at the University of Colorado and an author of the pape,r has previously demonstrated that stretchable, transparent, ionic conductors can be used to power artificial muscles and create transparent loudspeakers. However, none of these devices additionally had the ability to self-heal from mechanical damage.

The biggest difficulty was identifying bonds that are stable and reversible under electrochemical conditions. In the past, self-healing polymers have made use of non-covalent bonds; this creates a problem because those bonds are affected by electrochemical reactions, which degrade the performance of the materials.

Wang was able to solve the problem by using a mechanism called ion-dipole interactions (forces between charged ions and polar molecules that are highly stabile under electrochemical conditions). He was able to combine a polar, stretchable polymer with a mobile, high-ionic-strength salt. This created a material that had the properties the researchers were looking for.

By doing this, Wang was able to create a low-cost and easy to produce, soft rubber-like material that can be stretched up to 50 times its original length. When cut, it can completely heal itself in 24 hours at room temperature. In only five minutes of healing, the material can be stretched twice its original length.

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