Shulou(Shulou.com)11/24 Report--

CTOnews.com, August 4, according to CCTV News and the official website of Ningbo Institute of Materials Technology and Engineering of the Chinese Academy of Sciences (hereinafter referred to as Ningbo Institute of Materials), the institute has developed a new type of highly elastic ferroelectric material, which is published in the top international academic journal Science today.

According to reports, ferroelectric material is a kind of functional material, its surface has its own charge and has memory function. Under the action of an external electric field, the charges can be rearranged, and even if the electric field no longer acts, the arranged charges will remain as they are. This kind of material is one of the indispensable materials in electronic devices such as mobile phones and tablet computers.

However, most of the traditional ferroelectric materials are brittle (inorganic) or plastic (organic). With the rapid development of wearable devices, flexible electronics and intelligent sensing, the requirement of using materials is higher and higher: it is necessary to maintain stable performance under complex deformation.

The institute puts forward a concept of "elastic ferroelectric material", designs an accurate "micro-crosslinking method" to establish a network structure in ferroelectric polymer, and realizes the balance between ferroelectricity and elasticity of ferroelectric material. the elastic materials with good ferroelectric response under high frequency and large strain have been prepared.

CTOnews.com noted that the team used a small amount of soft chain polymer to cross-link the amorphous winding parts around the ferroelectric crystal and interweave each other to form an elastic fishing net structure. This kind of fishing net structure loosely connects the ferroelectric crystals together, and under the action of external force, it can produce reversible deformation to absorb external force and avoid the damage of external force to the crystallization part. so that the material can still maintain stable ferroelectricity in a certain range of tension.

The stretching rate of this material is as high as 125%. After stretching, it can not only maintain the original ferroelectricity, but also quickly restore the original state after the external force is removed, which greatly improves the reliability and service life, and expands the scope of application.

In addition, the material effectively solves the problem that it is difficult for traditional ferroelectric materials to maintain stable performance under large deformation in the wearable field, and fills the gap in the field of elastic ferroelectric materials. In the future, the sensors made of this material will be more easygoing, have higher measurement accuracy and better wearing comfort, and are expected to be widely used in smart medicine, intelligent wearable and other fields, and even made into arbitrarily bent mobile phone screens.

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