Expansion type nanometer inhibition gel for inhibiting spontaneous combustion of coal and preparation method of expansion type nanometer inhibition gel

Abstract

The invention provides an expansion type nanometer inhibition gel for inhibiting spontaneous combustion of coal and a preparation method the expansion type nanometer inhibition gel, belonging to the technical field of nanometer gel. The nanometer inhibition gel comprises an intumescent flame retardant, a nanometer flame retardant and a gel inhibitor, wherein the intumescent flame retardant comprises ammonium polyphosphate, polyethylene glycol and melamine; the nanometer flame retardant is nanometer silicon dioxide modified by a silane coupling agent process; and the gel inhibitor is a macromolecular hydrogel prepared from acrylamide through a monomer cross-linking polymerization method. The above three inhibition materials are compounded into the expansive nanometer inhibition gel by adopting an in-situ polymerization method. The gel is good in thermal stability, remarkable in inhibition effect at a high-temperature stage and long in inhibition service life, has the characteristics of stable gel material structure, large diffusion range and good water retention capacity, is an efficient, green, halogen-free, low-cost and stable environment-friendly inhibitor, can better adapt to a complex underground environment compared with a traditional inhibitor, and provides a new thought for research in the field of prevention and control of spontaneous combustion of coal.

Description

technical field [0001] The invention relates to the technical field of nano gels, in particular to an intumescent nano-resistance gel for inhibiting coal spontaneous combustion, that is, an intumescent flame retardant / modified nano silicon dioxide / polyacrylamide composite gel. Background technique [0002] The inhibitors commonly used in coal mines mainly include physical inhibitors, chemical inhibitors and composite inhibitors. However, among the physical inhibitors, halogen salt inhibitors will cause certain pollution to the environment, and the thermal stability is not high, and they are easy to be deactivated in the later stage of inhibition; silica gel inhibitors release a large amount of ammonia during the gelling process , cause certain harm to the human body, other gel inhibitors or viscosity, inhibition effect is not ideal, the cost is relatively high, the preparation process is complicated, the procedure is cumbersome, etc.; the polymer inhibitor participates in th...

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Problems solved by technology

Adding such particles directly to the polymer will not only fail to improve the performance of the material, but may also degrade the performance of the material

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