Abstract In this study, five types of surfactants including non-ionic lipophilic surfactant Span series surfactant, non-ionic hydrophilic surfactant Tween and OP series surfactant, characteristics of both anionic and hydrophilic surfactant NaOL and triethanolamine oleate (named as OL series for short), characteristics of both cationic and hydrophilic surfactant AC1201 and AC1205 (named as AC series for short) were chosen as research subjects to investigate the relationship between the structure and synergistic ability of surfactants, focusing on the adsorption of the typical cationic collector dodecylamine (DDA) and surfactant mixture at liquid/air and solid/liquid interface to investigate the application potential of structure in the development of an effective surfactant to apply for quartz flotation. Flotation experiments, surface tension measurements, microcalorimetric experiments, interaction parameter calculation and Fourier Transform Infrared Spectroscopy (FTIR) analysis were used to analyze the characteristics of different DDA/surfactant systems and the interaction mechanism between quartz and collector mixture. The flotation results indicated that the synergistic capacity of these surfactants was in the following ranking: AC > OP > Tween > Span > OL. AC1201 showed a stronger synergistic ability than the other surfactants, accompanying with a recovery promotion over 20% compared with pure DDA. The physicochemical properties including surface activity parameters, the micelles and interfacial compositions, and interaction parameters were evaluated according to the theory of regular solutions. The surface tension and critical micelle concentration of the mixture solution decreased with the addition of the surfactant. According to the basic Rubingh equations, the interaction parameter of these surfactants was in the following ranking: OL > Span > OP > Tween > AC, indicating that the flotation recovery of quartz was negatively correlated with the interaction parameters. While there was a positive correlation between the interaction heat changes obtained from microcalorimetry and the trend from the flotation experiments. The obtained results demonstrated that it should be chosen this type of surfactant, which can be able to intensify collector adsorption at the solid/liquid interface. AC1201 has a potential for industrial application in the flotation of quartz.

中文翻译：

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混合DDA/表面活性剂捕收剂对石英浮选的协同作用

摘要 本研究采用非离子亲油表面活性剂Span系列表面活性剂、非离子亲水表面活性剂吐温和OP系列表面活性剂五种表面活性剂，兼具阴离子和亲水表面活性剂NaOL和油酸三乙醇胺（简称OL系列）的特性，以阳离子表面活性剂和亲水表面活性剂AC1201和AC1205（简称AC系列）的特性为研究对象，研究表面活性剂的结构与协同能力之间的关系，重点研究了典型的阳离子捕收剂十二胺（DDA）和表面活性剂混合物在液体/空气和固体/液体界面，以研究结构在开发用于石英浮选的有效表面活性剂中的应用潜力。浮选实验，通过表面张力测量、微量热实验、相互作用参数计算和傅里叶变换红外光谱 (FTIR) 分析，分析了不同 DDA/表面活性剂体系的特性以及石英与收集器混合物之间的相互作用机制。浮选结果表明，这些表面活性剂的增效能力依次为：AC > OP > Tween > Span > OL。AC1201显示出比其他表面活性剂更强的协同能力，与纯DDA相比，回收率提高了20%以上。根据规则溶液理论评估包括表面活性参数、胶束和界面组成以及相互作用参数在内的物理化学性质。混合溶液的表面张力和临界胶束浓度随着表面活性剂的加入而降低。根据Rubingh基本方程，这些表面活性剂的相互作用参数排列如下：OL > Span > OP > Tween > AC，表明石英的浮选回收率与相互作用参数呈负相关。而从微量热法获得的相互作用热变化与浮选实验的趋势之间存在正相关。得到的结果表明，应选择这类表面活性剂，它能够加强固/液界面的捕收剂吸附。AC1201 在石英浮选方面具有工业应用的潜力。根据Rubingh基本方程，这些表面活性剂的相互作用参数排列如下：OL > Span > OP > Tween > AC，表明石英的浮选回收率与相互作用参数呈负相关。而从微量热法获得的相互作用热变化与浮选实验的趋势之间存在正相关。得到的结果表明，应选择这类表面活性剂，它能够加强固/液界面的捕收剂吸附。AC1201 在石英浮选方面具有工业应用的潜力。根据Rubingh基本方程，这些表面活性剂的相互作用参数排列如下：OL > Span > OP > Tween > AC，表明石英的浮选回收率与相互作用参数呈负相关。而从微量热法获得的相互作用热变化与浮选实验的趋势之间存在正相关。得到的结果表明，应选择这类表面活性剂，它能够加强固/液界面的捕收剂吸附。AC1201 在石英浮选方面具有工业应用的潜力。表明石英的浮选回收率与相互作用参数呈负相关。而从微量热法获得的相互作用热变化与浮选实验的趋势之间存在正相关。得到的结果表明，应选择这类表面活性剂，它能够加强固/液界面的捕收剂吸附。AC1201 在石英浮选方面具有工业应用的潜力。表明石英的浮选回收率与相互作用参数呈负相关。而从微量热法获得的相互作用热变化与浮选实验的趋势之间存在正相关。得到的结果表明，应选择这类表面活性剂，它能够加强固/液界面的捕收剂吸附。AC1201 在石英浮选方面具有工业应用的潜力。可以加强固/液界面的捕收剂吸附。AC1201 在石英浮选方面具有工业应用的潜力。可以加强固/液界面的捕收剂吸附。AC1201 在石英浮选方面具有工业应用的潜力。