Imagine that once our phone achieves a soft and snug fit, it can be easily folded, making it not only more convenient to carry around, but also integrated into clothing or gloves; If patients can wear clothes with flexible sensors and can be cleaned, they can monitor their heart rate, breathing, and other health information anytime and anywhere... The prerequisite for these applications is to have elastic ferroelectric materials, and now our scientific research team has made important breakthroughs in this regard. On August 4, 2023 (Beijing time), the international academic journal Science published the latest achievements of the flexible magnetoelectric functional materials and devices team of Ningbo Institute of Materials, Chinese Academy of Sciences: the team took the lead in developing new polymer ferroelectric materials with both elastic recovery and ferroelectricity in the world, effectively solving the problem that traditional ferroelectric materials are difficult to maintain stability under large deformation in the wearable field, and filling the gap in the field of elastic ferroelectric materials. The picture shows an elastic ferroelectric material. Hu Benlin, the corresponding author of the drawings and papers provided by the Chinese Academy of Sciences Ningbo Institute of Materials and a researcher of the Chinese Academy of Sciences Ningbo Institute of Materials, introduced that ferroelectric materials are a kind of magical insulating functional materials with memory ability. They can remember the previous electric field state. Even if the electric field no longer acts, the arranged charges will remain in the original state without changing. This enables ferroelectric materials to possess high dielectric constant, piezoelectric, thermoelectric, and electric refrigeration properties, which can be used in electronic products such as computer memory, high-precision motors, ultra sensitive sensors, and sonar devices. It is also an essential material in electronic devices such as mobile phones and tablets that we use in our daily lives. In recent years, flexible wearable devices have broad application prospects in fields such as portable mobile electronic devices and human motion detection, and have received widespread attention. As one of the important materials for manufacturing flexible wearable devices, the elasticity of ferroelectric materials is also urgent, but the research and preparation of elastic ferroelectric materials is difficult. Li Runwei, the corresponding author of the paper and a researcher at the Chinese Academy of Sciences Ningbo Institute of Materials, said that this is because the ferroelectricity of ferroelectric materials comes from the crystalline part of the materials, but the crystals themselves almost have no elasticity, the tensile ratio is generally less than 5%, and there is no resilience, so it is difficult to give consideration to both ferroelectricity and elasticity for ferroelectric materials, which makes many scientific research institutions flinch. Can't sugarcane really be sweet at both ends? Based on in-depth research on the structure of ferroelectric materials, the research team innovatively proposed the concept of "elastic ferroelectricity". Through precise design and control of the material structure, the balance between ferroelectricity and elasticity of ferroelectric materials was achieved, and an elastic material with good ferroelectric response under high frequency and large strain was prepared. This material has a tensile rate of up to 125%, which means that it can be stretched to twice its original length, Not only can it maintain its original ferroelectricity, but it can also quickly restore its original state after external forces are removed. The picture shows some members of the research team. The first author of the picture paper provided by Ningbo Institute of Materials, Chinese Academy of Sciences, and the graduate of Chinese Academy of Sciences Ningbo Institute of Materials in 2023, highlighted that the research team used the "micro crosslinking method" to use a small amount of soft chain polymer to make the winding parts of the amorphous around the ferroelectric crystal cross-linked, and intertwined with each other to form an elastic fishing net structure. This elastic ferroelectric material does not
Edit：XiaoWanNing Responsible editor：YingLing
Source：China Youth News
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