基于纳米气泡-捕收剂协同构筑一水硬铝石表面超疏水微结构的润湿性调控机制研究

捕收剂调控矿物界面润湿性存在药剂消耗量大、环境污染严重等问题。纳米气泡作为一种绿色经济的“二次捕收剂”，能够以界面疏水气域的形式增强矿物表面疏水性。然而，关于纳米气泡-捕收剂协同强化矿物界面疏水的研究鲜有报道，其内在机理也不明确，更是难以实现纳米气泡-捕收剂协同作用下的矿物表面润湿性的精准调控。本项目以一水硬铝石为研究矿物，从气液界面和矿物界面受限区域内纳米气泡-捕收剂（油酸钠）间的相互作用出发，探讨纳米气泡-油酸钠协同构筑一水硬铝石表面超疏水微结构的机理；研究不同溶液化学条件下，界面超疏水微结构及其特征对一水硬铝石润湿性的影响规律。本研究旨在探明纳米气泡-捕收剂体系中矿物表面疏水域结构、组成和功能之间的内在联系，提出基于纳米气泡-油酸钠协同构筑界面超疏水微结构的一水硬铝石润湿性精准调控机制。项目研究成果可为纳米气泡协同捕收剂强化矿物浮选提供理论支撑，为纳米气泡浮选技术的发展提供技术支持。

There are some problems in the regulation of mineral interface wettability by collectors, such as large consumption of reagents and serious environmental pollution. As a green and economic "secondary collector", nanobubbles can enhance the surface hydrophobicity of minerals by forming interfacial hydrophobic gas domain. However, there are few reports on the synergistic enhancement of interfacial hydrophobicity by nanobubbles and collectors, and its internal mechanism is not clear, which makes it difficult to achieve precise control of mineral surface wettability under the synergistic effect of nanobubbles and collectors. In this project, diaspore is taken as the research mineral, and sodium oleate as collector. The formation mechanism of nanobubble-collector synergistically constructed superhydrophobic microstructure on mineral surface will be initially discussed, through illustrating the interaction between nanobubbles and collectors in the gas-liquid interface and limited mineral-liquid interface. Afterward, the influence of superhydrophobic microstructure and its characteristics on the wettability of diaspore under different solution chemical conditions will be studied. The purpose of this study is to explore the internal relationship between the structure, composition and function of hydrophobic domain on mineral surface in the system of nanobubble collector, and thus to propose a precise control mechanism of diaspore wettability based on the regulation of superhydrophobic microstructure constructed by nanobubbles and sodium oleate. The research results of the project can provide theoretical support for mineral flotation enhanced by nanobubbles and collectors, and meanwhile provide technical support for the development of nanobubble flotation technology.