drilling into limestone formations for exploration and

The coal mining industry, a critical sector in the global energy landscape, has seen significant advancements over the centuries. One of the most notable developments is the evolution of coal mine tools, which have played an instrumental role in shaping the productivity and safety standards within this industry. From hand-held picks and shovels to sophisticated machinery, the journey of these tools encapsulates human ingenuity and the relentless pursuit of efficiency and safety.

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The polymerization of resin monomers was initiated in the presence of nanofibers as structural templates to prepare a hydrogel with nanofibrous networks, followed by the drying and pyrolysis to get hard carbon aerogel. During polymerization, the monomers deposit on templates and weld the fiber-fiber joints, leaving a random network structure with massive robust joints. Moreover, physical properties (such as diameters of nanofiber, densities of aerogels, and mechanical properties) can be controlled by simply tuning templates and the amount of raw materials.

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