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原子力显微镜和分子动态模拟不同化学成分的聚烯胺对碳酸的吸附

Jin Hau Lew¹, Keat Yung Hue¹, Omar K Matar¹

¹Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK.

|February 24, 2024

概括

聚烯胺 (PAM) 与碳酸的相互作用取决于功能组和盐度. 硫酸PAM表现出更强的附着性,受盐离子形成桥梁的影响,影响了各种溶液中的吸附.

科学领域:

材料科学材料科学材料科学
表面化学表面化学
聚合物科学聚合物科学

背景情况:

聚烯胺 (PAM) 在各种工业应用中广泛使用.
了解PAM与碳酸等矿物表面的相互作用,对于优化其性能至关重要.
不同的PAM功能组和电荷密度会影响表面相互作用.

研究的目的:

研究不同类型的PAM与碳酸 (CaCO3) 之间的相互作用机制.
阐明功能组 (硫酸盐与碳酸盐) 的作用和电荷密度对PAM-CaCO3粘附的作用.
探索盐度和类型对这些相互作用的影响.

主要方法:

原子力显微镜 (AFM) 用于测量粘附和相互作用能量.
分子动力学 (MD) 模拟在模型 PAM 和石表面上进行.
分析了不同度 (NaCl和NaNO3) 的PAM溶液.

主要成果:

由于硬质阻碍,硫化PAM (AN125) 的粘合力比碳化PAM (F3330) 低.
AN910显示了不同的粘附和排斥特性,表明了更循环的配置.
盐度显著影响了粘附性;较高度通常降低了F3330和AN125的粘附性,但增加了AN910.
MD模拟证实盐离子在PAM和石之间形成桥梁,调解粘附.

结论:

PAM-CaCO3相互作用是电荷选和盐桥架之间的平衡.
功能组和盐离子的类型决定了粘附力.
吸附行为高度依赖于溶液化学,特别是盐类型和度.

关键词:

吸附吸附是一种吸附.原子力显微镜 (AFM) 的使用强力光谱法强力光谱法化过的多烯胺.分子动态 (MD) 模拟模拟盐盐盐盐盐盐盐盐硫化聚烯胺硫化物

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