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The review article "Poly(p-Phenylene Benzobisoxazole) Nanofiber: A Promising Nanoscale Building Block Toward Extremely Harsh Conditions" published by Professor Zhang Meiyun and Associate Professor Yang Bin of Shaanxi University of Science and Technology in ACS Nano systematically summarizes the preparation methods, application progress and potential challenges of PBO nanofibers.
The preparation methods of PBO nanofibers can be divided into two approaches: "bottom-up" and "top-down".
Bottom-up: including electrospinning, self-assembly and crystallization. For example, PBO nanofiber membranes can be directly prepared by electrospinning technology for battery separators, high temperature resistant protective layers and insulating materials.
Top-down: such as mechanical beating and protonation methods, among which the protonation method has attracted widespread attention because of its simple operation and ability to retain the excellent properties of PBO fibers.
PBO nanofibers are widely used under extreme conditions, including:
Thermal protection and insulation: PBO nanofibers have excellent thermal insulation properties and can be used to construct thermal insulation materials.
Electrical insulation and heat dissipation: Meet the requirements of flexible electronic devices for mechanical strength and insulation properties.
Electromagnetic protection: Excellent performance in electromagnetic shielding and absorption, can be used to solve electromagnetic pollution problems.
Structural reinforcement: Improve the mechanical properties of composite materials and provide new ideas for material reinforcement.
Efficient and controllable preparation: Develop low-cost and high-efficiency preparation methods to promote the large-scale production of PBO nanofibers.
Diversified applications: By compounding with other nanomaterials, expand its application in flame retardant insulation, electrical insulation, electromagnetic shielding, wave absorption, flexible sensing and other fields.
Performance optimization: Further improve the mechanical properties, thermal stability and chemical resistance of PBO nanofibers to meet the application needs in more extreme environments.
Advantages of electrospinning technology: Electrospinning technology is very suitable for the preparation of high-performance PBO nanofibers due to its simple equipment, low cost and controllable process. Through electrospinning, PBO nanofibers can be continuously produced under relatively mild conditions while retaining their excellent mechanical properties and thermal stability.
Preparation of high-performance PBO nanofibers: Electrospinning technology can accurately control the diameter and morphology of PBO nanofibers, thereby optimizing their performance. By adjusting the spinning parameters (such as voltage, solution concentration, collection distance, etc.), PBO nanofibers with diameters between 100 nm and 10 μm can be prepared.
Although PBO nanofibers show great application potential, their development still faces challenges, such as high costs of raw materials and reagents, and difficulty in large-scale preparation. In the future, with the advancement of science and technology, PBO nanofibers are expected to realize their application value in more fields, especially in aerospace, flexible electronics, and energy management.
Electrospinning Nanofibers Article Source:
https://doi.org/10.1021/acsnano.4c14912
