日用化学工业（中英文）2025，Vol.55Issue(12)：1534-1543,10.DOI:10.3969/j.issn.2097-2806.2025.12.005
基于两性/非离子表面活性剂的纳米乳液捕收剂强化低阶煤浮选机理
Mechanism of enhanced low-rank coal flotation using a nanoemulsion collector based on zwitterionic/nonionic surfactants
摘要
Abstract
The abundant oxygen-containing functional groups and pore structures on the surface of low-rank coal(LRC)have restricted its flotation efficiency.Compared with traditional hydrocarbon oil collectors,emulsion collectors are an effective method to improve the dispersion performance and improve their adsorption and hydrophobic modification effect on LRC surface.In this work,a series of nanoemulsion collectors which were synergistically stabilized with zwitterionic and nonionic surfactants were prepared by low-energy emulsification method,using erucic acid amidopropyl betaine(EAB-40)and fatty alcohol polyoxyethylene ether(AEO-7)as surfactants,and diesel oil as oil phase.The influences of the contents of EAB-40 and AEO-7 on the droplet size and microscopic dynamic stability of nanoemulsions were systematically studied through dynamic light scattering(DLS)and multiple light scattering(MLS).The mechanism for nanoemulsions to enhance flotation was investigated through LRC flotation tests and the measurements of particle-bubble and particle-droplet adhesion/detachment forces.The results showed that when the mass ratio of EAB-40∶AEO-7 was 1∶4(nanoemulsion collector#1),the droplet size of the nanoemulsion was the smallest(D50=307 nm),and the combustible matter recovery of LRC flotation could reach the maximum of 92.24%.Compared with traditional diesel collector,nanoemulsion collector#1 could significantly improve the hydrophobicity of LRC surface,enhance the adhesion/detachment interactions between coal particle and bubble and between coal particle and collector,and thus significantly improve the LRC flotation performance.The mechanism was that the EAB-40 at the surface of nanoemulsion droplets had both positively and negatively charged groups,which could both enhance the adsorption of collectors onto LRC surface and the hydrophobic modification of LRC surface through electrostatic attraction;however,when the EAB-40 content was too high,it would lead to excessive adsorption of surfactants and reduce the surface hydrophobic modification and the flotation performance to a certain extent.This research might be helpful to improve the theoretical basis and provide technical support for the development of novel collectors for LRC flotation.关键词
低阶煤/浮选/纳米乳液捕收剂/两性离子表面活性剂/非离子表面活性剂/粘附作用力/脱附作用力Key words
low-rank coal/flotation/nanoemulsion collector/zwitterionic surfactant/non-ionic surfactant/adhesion force/detachment force分类
化学化工引用本文复制引用
王莹莹,马振超,李哲,孔艺博,赵欣怡,邢耀文,桂夏辉..基于两性/非离子表面活性剂的纳米乳液捕收剂强化低阶煤浮选机理[J].日用化学工业（中英文）,2025,55(12):1534-1543,10.基金项目
煤炭能源领域企业创新发展联合基金重点项目(U24B20198) （U24B20198）
中国博士后科学基金资助项目(2024M763563) （2024M763563）
中央高校基本科研业务费专项资金资助(2025QN1180) （2025QN1180）
