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• W4306408217 startingPage "136902" @default.
• W4306408217 abstract "A serious risk to the production safety of coal mines is coal dust. The wettability of coal may be successfully changed by adding surfactants to water. However, the creation of very effective dust suppressants is constrained by the lack of knowledge about the microscopic interaction mechanism between coal dust and surfactants. In this investigation, we explained macroscopic experimental phenomena from a molecular perspective. The lauryl polyoxyethylene ethers (C12 (EO)n, n = 7,15,23) were selected. The macromolecular model of anthracite with 55 different components was constructed. Surface tension experiments and hydrophilic lipophilic balance (HLB) calculations showed that the ability of surface hydrophilicization followed the order of C12 (EO)7<C12 (EO)15<C12 (EO)23. Contact angle experiment, XPS and FTIR experiments proved that after the surfactants were adsorbed on the surface of anthracite, the content of carbon element decreased and the content of oxygen element increased, indicating the enhanced surface hydrophilicity. The simulation results showed that with the degree of ethoxylation increases, the adsorption strength of surfactants becomes stronger, and the hydrophilic head group of surfactant on anthracite surface is more uniformly distributed. The greater the degree of ethoxylation, the more powerfully the modified coal surface can bind to water molecules." @default.
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• W4306408217 date "2023-01-01" @default.
• W4306408217 modified "2023-10-10" @default.
• W4306408217 title "Molecular mechanism study on the effect of nonionic surfactants with different degrees of ethoxylation on the wettability of anthracite" @default.
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• W4306408217 doi "https://doi.org/10.1016/j.chemosphere.2022.136902" @default.
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