液体化学基团对多孔碳颗粒动态孔隙润湿和颗粒-气泡附着的影响

IF 4.1 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology Pub Date : 2025-02-26 DOI:10.1016/j.partic.2025.02.009

Chengping Deng , Teng He , Liuyang Dong , Yuqiang Mao , Peilun Shen , Dianwen Liu

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引用次数: 0

摘要

动态孔隙润湿对多孔矿物颗粒的浮选起着重要作用。然而，液体化学性质在动态孔隙润湿过程中的作用尚未得到系统的研究。采用1H低场核磁共振（LF-NMR）研究了不同润湿时间下，10 g/L NaOL溶液和正十六烷对多孔碳颗粒的动态润湿过程。通过红外光谱（FTIR）、zeta电位、接触角和颗粒-气泡附着试验，揭示了液体化学基团对孔隙润湿率和多孔颗粒可浮性的影响机理。结果表明：除中孔外，NaOL溶液润湿颗粒的孔隙润湿率均大于正十六烷。与原始样品相比，正十六烷润湿颗粒的表面电位降低，NaOL溶液润湿颗粒的表面电位为负。NaOL作为两亲性试剂，含有与正十六烷不同的疏水和亲水官能团。与正十六烷相比，NaOL分子更容易通过静电相互作用吸附到颗粒中，从而使颗粒具有更好的表面疏水性。因此，NaOL溶液润湿多孔碳颗粒的可浮性大于正十六烷。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

The effects of chemical groups of liquids on the dynamic pore wetting and particle-bubble attachment of porous carbon particles

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The effects of chemical groups of liquids on the dynamic pore wetting and particle-bubble attachment of porous carbon particles

Dynamic pore wetting plays a major role in the flotation of porous mineral particles. However, the role of chemical properties of the liquids in dynamic pore wetting is not systematically studied. This paper studied the dynamic pore wetting process of the porous carbon particles by 10 g/L NaOL solution and n-hexadecane at different wetting times using a ¹H low-field nuclear magnetic resonance (LF-NMR). The mechanism of chemical groups of liquids affecting the pore wetting percentage and floatability of porous particles was revealed by FTIR, zeta potential, contact angle, and particle-bubble attachment tests. The results displayed that the pore wetting percentage of the particles wetted by NaOL solution was larger than that by n-hexadecane except for mesopores. Compared with the raw sample, the surface potential of the particles wetted by n-hexadecane was decreased and that by NaOL solution were negative. The NaOL, as an amphiphilic reagent contained some hydrophobic and hydrophilic functional groups, which was different from the n-hexadecane. The NaOL molecule could be easily adsorbed into the particles by electrostatic interaction compared with n-hexadecane, achieving a better surface hydrophobicity of the particles. Thus, the floatability of porous carbon particles wetted by NaOL solution was larger than that by n-hexadecane.

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来源期刊

Particuology 工程技术-材料科学：综合

CiteScore

6.70

自引率

2.90%

发文量

1730

审稿时长

32 days

期刊介绍： The word ‘particuology’ was coined to parallel the discipline for the science and technology of particles. Particuology is an interdisciplinary journal that publishes frontier research articles and critical reviews on the discovery, formulation and engineering of particulate materials, processes and systems. It especially welcomes contributions utilising advanced theoretical, modelling and measurement methods to enable the discovery and creation of new particulate materials, and the manufacturing of functional particulate-based products, such as sensors. Papers are handled by Thematic Editors who oversee contributions from specific subject fields. These fields are classified into: Particle Synthesis and Modification; Particle Characterization and Measurement; Granular Systems and Bulk Solids Technology; Fluidization and Particle-Fluid Systems; Aerosols; and Applications of Particle Technology. Key topics concerning the creation and processing of particulates include: -Modelling and simulation of particle formation, collective behaviour of particles and systems for particle production over a broad spectrum of length scales -Mining of experimental data for particle synthesis and surface properties to facilitate the creation of new materials and processes -Particle design and preparation including controlled response and sensing functionalities in formation, delivery systems and biological systems, etc. -Experimental and computational methods for visualization and analysis of particulate system. These topics are broadly relevant to the production of materials, pharmaceuticals and food, and to the conversion of energy resources to fuels and protection of the environment.