<![CDATA[Spontaneous combustion is a self-combustion process which is caused by self-heating due to an increase in temperature by an exothermic internal reaction. Heating itself rapidly will accelerate the rise in high temperatures, until finally self-ignition occurs. As we know that spontaneous combustion of coal is a bit dangerous if we couldn’t control it. A new type of mining fire-extinguishing material designed to prevent the spontaneous combustion of coal is presented. Through the graft copolymerization of corn straw, 2-acrylamide-2-methylpropanesulfonic acid (AMPS), and acrylic acid (AA), a corn straw-co-AMPS-co-AA hydrogel was synthesized. A chemical foaming agent was then added to the hydrogel, resulting in a self-foaming gel, which was subsequently mixed with expandable graphite to create an intelligent gel. The intelligent gel exhibited uniform self-foaming when a foaming agent was used. When the water component of the gel had completely evaporated, the gel expanded a second time, with the best results obtained when 10% of expandable graphite was added. The fire-extinguishing performance of the intelligent gel was found to be superior to those of the other gels, as it prevented re-ignition. Thus, this gel is an ideal fire prevention and control material, especially for controlling the spontaneous combustion of coal.]]>
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