Synthesis and performance of sulfonated poly(styrene-alt-maleic anhydride) for coal-water slurry: The effect of structure on slurryability and stability
The development and application of high-efficiency coal-water slurry (CWS) dispersants can foster the clean utilization of natural coal. CWS with excellent flowability and stability requires good adsorption capacity of dispersant on pulverized coal surface, which is influenced substantially by the architecture and hydrophilicity of dispersants molecule. In this study, a series of neutralized sulfonated poly(styrene- alt -maleic anhydride) (NSPSM) with different molecular weight (M n ) and sulfonation degree (SD) were synthesized by self-stabilized precipitation polymerization (2SP), gas-solid heterogeneous sulfonation reaction (GSR) and neutralization reaction with NaOH. The performance of NSPSM for CWS, and their dispersion and stabilization mechanisms were investigated in detail. Under optimized conditions, maximum slurry concentration (MSC) and water separation ratio (WSR) of slurry with NSPSM could reach 66.5% and 2.0%, respectively, which are superior to commercial naphthalene sulfonate formaldehyde condensate (NSF) dispersant. The outstanding dispersibility of NSPSM was ascribed to its improved adsorption capacity due to increased charge density along polymer chain, which can prevent agglomeration among coal particles through electrostatic repulsion.
危险品化学品经营许可证（带存储）