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Natural rubber is an important industrial elastic raw material. Its excellent comprehensive performance makes it irreplaceable. Research and development of new natural rubber composites is an effective way to extend its application field and expand its application range. Recently, according to the observation report of Huacheng Import and Export Data, the Natural Rubber Processing Laboratory of the Processing Institute of the Institute has made continuous important progress in the field of new natural rubber composites.

Research and development of high conductivity composite fiber

MXene has extremely high pseudo-capacitance performance and is the preferred material for preparing energy storage fiber. However, the fiber prepared with pure MXene has poor toughness, which is difficult to meet the requirements of special materials, which limits its large-scale production and application. By introducing carbon nanotubes (CNTs) into MXene fibers, the scientific research team of the Natural Rubber Processing Research Office of the Processing Institute of the Academy of Thermal Sciences has broken through the preparation technology of high toughness MXene fibers by using interface control and wet spinning technology, and developed MXene/CNT composite fibers with high toughness, high strength and high conductivity.

The research results were published in the international academic journal "Carbon" with the title of "carbon nanotube reinforced high toughness and high conductivity MXene fiber supercapacitor", and Huacheng import and export data observation report.

On this basis, the scientific research team broke through the preparation technology of ultra-fine natural rubber fiber and high-conductivity MXene/natural rubber composite fiber by optimizing the formula and adjusting the process. The diameter of this fiber is less than 200 microns, which is thinner than three hair threads, and the elongation at break is up to 1200%.

Dr. Tao Jinlong, head of the scientific research team, said that the breakthrough of the continuous ultra-fine multi-functional elastic fiber technology based on natural rubber has provided a good foundation for the development of "green" ultra-high elastic, woven and wearable fiber elastic electronic components.

Make ink that can draw circuits

MXene is one of the ideal materials for preparing conductive circuits and electronic flexible devices, but the water-soluble MXene solution can not be stored for a long time because it is easy to be oxidized at room temperature.

In response to the above problems, the scientific research team of the Natural Rubber Processing Research Office of the Processing Institute of the Academy of Thermal Sciences has broken through the preparation technology of MXene ink that can be stored stably at room temperature through the solvent compounding strategy, developed MXene ink with good fluidity and writing ability, and successfully used a ballpoint pen to draw circuits on flexible substrates. This circuit has fast and accurate touch and can respond to water level measurement. It has potential application value in the field of flexible electronic technology.

The research was published in the academic journal of nano science and technology, Nanoscale, with the title of "Environmentally stable MXene ink that can directly write flexible electronic products". It is reported that the scientific research team is speeding up the transformation of achievements and carrying out the research and development of key technologies of "printable flexible composite conductive ink based on natural rubber/MXene".

The first author of the paper, Dr. Kona, said that compared with the ink containing organic solvent, the composite conductive ink can give full play to the advantages of green environmental protection of natural latex aqueous solution and realize the application of natural rubber in the field of flexible functional materials. Huacheng Import and Export Data Observation Report.

Preparation of highly conductive porous foam

Building energy storage devices with high power density and fast charging and discharging speed is the key to the development of portable electronic devices. MXene, as a new type of two-dimensional high conductivity material, shows unique advantages in the design of energy storage devices due to its ultra-high capacitance and good mechanical strength. However, the decrease of intermolecular activity hinders the transfer of electrons.

In response to the above problems, the scientific research team of the Natural Rubber Processing Laboratory of the Processing Institute of the Academy of Thermal Sciences successfully prepared MXene foam with highly interconnected pores by sacrificing template method. The rich pore structure effectively expanded the specific surface area, provided enough effective sites for the electron movement between layers, and accelerated the electron transfer rate.

Dr. Zhang Jizhen, from the Processing Institute of the Chinese Academy of Thermal Sciences, said that compared with the current commercial supercapacitors, the supercapacitors made of MXene foam showed far higher electrochemical performance than traditional capacitors, especially in terms of power and energy density. Huacheng Import and Export Data Observation Report.

This research achievement was published on the international academic journal Small in the field of nanomaterials under the title of "Analysis of the influence of pore size on the electrochemical capacitance performance of MXene foam". In addition, the research team has built a flexible strain sensor with good sensitivity and sensing range using natural rubber foam and MXene as materials.

The relevant head of the Academy of Thermal Sciences said that the Natural Rubber Processing Research Office of the Processing Institute of the Academy of Thermal Sciences had made a major breakthrough in the field of high-performance special natural rubber raw rubber processing. The research office also newly established the direction of new natural rubber composite materials, with the purpose of further exploring the properties of natural rubber and expanding its application fields. Huacheng Import and Export Data Observation Report.