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According to the report of the physicist organization's network on May 17, at present, the development momentum of flexible electronic equipment is excellent, but it faces an important problem: the electronic materials may be damaged after multiple breakages and repairs. Now, scientists from China and the United States have teamed up to develop a new type of electronic material that can automatically restore all functions even if it breaks many times, helping to improve the durability and durability of wearable devices. The relevant research results were published in the latest issue of Advanced Functional Materials.
Scientists from Pennsylvania State University and Harbin University of Technology have added boron nitride nanosheets to a plastic polymer raw material. Boron nitride nanoplates are connected by hydrogen bonds that act on their surfaces. When two nanosheets are used In close proximity, the naturally occurring electron attraction between the hydrogen bonds makes them closely linked; when the hydrogen bonds recover, the nanoplatelet also recovers automatically. Depending on the percentage of boron nitride nanosheets added to the polymer, this self-healing method requires additional heating or pressurization, but some forms of new materials will automatically resume function at room temperature.
Boron nitride nanosheets are also two-dimensional materials, but they are non-conductive and can be used as insulators in wearable devices. Experiments have shown that when this material is destroyed, it can restore all properties as an insulator, including mechanical strength, breaking strength, electrical resistance, thermal conductivity, and insulation.
Wang Qing, a professor of materials science and engineering at Pennsylvania State University, said: "Wearable devices and flexible electronic devices will mechanically deform over time, resulting in damage to the device's function and appearance. Therefore, we hope to develop a The electronic materials that can still recover all functions after multiple crushes.†He said that most of the auto-recovery materials are soft, but the new materials they developed are very strong; and unlike other recoverable materials that use hydrogen bonds, nitrogen Boron nanosheets are impervious to moisture, which means that equipment using this insulating material can operate in a humid environment.
Previously, researchers have developed materials that can automatically repair a function after crushing, but for efficient wearable devices, restoring full functionality is crucial. This is the first time that scientists have developed self-healing materials that can recover multiple properties after multiple damages. (Reporter Liu Xia)
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