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Influence of functional polyelectrolytes on the stability of clay hydrodispersions
Chemical Papers ( IF 2.1 ) Pub Date : 2021-06-25 , DOI: 10.1007/s11696-021-01718-4
Amankait Asanov , Sayat Mameshova

The destabilization of disperse systems using flocculation is an approach in hydrometallurgy, purification of wastewater, agriculture, etc. The recent efforts here have been made in development of polyelectrolytes. In this work, the bentonite clay hydrodispersions stability under the influence of polyelectrolytes, differing in molar ratio, and types of functionality, was investigated. The dispersions obtained were characterized by spectrophotometry, conductivity measurements, viscometry. The stability of clay hydrodispersions was studied by the turbidimetric method. Under the influence of a polyelectrolyte containing non-ionizable acetate and amide groups, a slight increase in hydrodispersions’ destabilization with the number of very weakly positively charged amide groups was observed. In the presence of polyelectrolytes containing vinyl acetate and well-ionizable aliphatic amine groups, the hydrodispersions’ destabilization was clearly expressed. A pronounced decrease in the hydrodispersion stability was observed under the influence of polyelectrolytes obtained from the highly-ionized 2-vinylpyridine and diethylaminoethylmethacrylate. Polyelectrolytes obtained from vinyl acetate and highly-ionized aliphatic amino-groups had more pronounced effect on destabilization. Hence, features of polyelectrolyte nature, composition, charge density and molecular weight effect on the stability of bentonite clay were elucidated. The selection of the appropriate dose of coagulants and flocculants was demonstrated to be nonlinear function of turbidity.



中文翻译:

功能性聚电解质对粘土水分散体稳定性的影响

使用絮凝使分散系统不稳定是湿法冶金、废水净化、农业等领域的一种方法。最近在聚电解质的开发方面做出了努力。在这项工作中,研究了不同摩尔比和官能团类型的聚电解质影响下的膨润土水分散体稳定性。获得的分散体通过分光光度法、电导率测量、粘度测定法表征。通过比浊法研究粘土水分散体的稳定性。在含有不可电离的乙酸酯和酰胺基团的聚电解质的影响下,观察到水分散体的不稳定随着非常弱的带正电荷的酰胺基团的数量略有增加。在含有醋酸乙烯酯和可充分电离的脂肪胺基团的聚电解质的存在下,水分散体的去稳定作用被清楚地表现出来。在从高度电离的 2-乙烯基吡啶和甲基丙烯酸二乙氨基乙酯获得的聚电解质的影响下,观察到水分散稳定性的显着降低。从醋酸乙烯酯和高度电离的脂肪族氨基获得的聚电解质对去稳定作用更显着。因此,阐明了聚电解质性质、组成、电荷密度和分子量对膨润土稳定性的影响。混凝剂和絮凝剂合适剂量的选择被证明是浊度的非线性函数。水分散体的不稳定被清楚地表达出来。在从高度电离的 2-乙烯基吡啶和甲基丙烯酸二乙氨基乙酯获得的聚电解质的影响下,观察到水分散稳定性的显着降低。从醋酸乙烯酯和高度电离的脂肪族氨基获得的聚电解质对去稳定作用更显着。因此,阐明了聚电解质性质、组成、电荷密度和分子量对膨润土稳定性的影响。混凝剂和絮凝剂合适剂量的选择被证明是浊度的非线性函数。水分散体的不稳定被清楚地表达出来。在从高度电离的 2-乙烯基吡啶和甲基丙烯酸二乙氨基乙酯获得的聚电解质的影响下,观察到水分散稳定性的显着降低。从醋酸乙烯酯和高度电离的脂肪族氨基获得的聚电解质对去稳定作用更显着。因此,阐明了聚电解质性质、组成、电荷密度和分子量对膨润土稳定性的影响。混凝剂和絮凝剂合适剂量的选择被证明是浊度的非线性函数。在从高度电离的 2-乙烯基吡啶和甲基丙烯酸二乙氨基乙酯获得的聚电解质的影响下,观察到水分散稳定性的显着降低。从醋酸乙烯酯和高度电离的脂肪族氨基获得的聚电解质对去稳定作用更显着。因此,阐明了聚电解质性质、组成、电荷密度和分子量对膨润土稳定性的影响。混凝剂和絮凝剂合适剂量的选择被证明是浊度的非线性函数。在从高度电离的 2-乙烯基吡啶和甲基丙烯酸二乙氨基乙酯获得的聚电解质的影响下,观察到水分散稳定性的显着降低。从醋酸乙烯酯和高度电离的脂肪族氨基获得的聚电解质对去稳定作用更显着。因此,阐明了聚电解质性质、组成、电荷密度和分子量对膨润土稳定性的影响。混凝剂和絮凝剂合适剂量的选择被证明是浊度的非线性函数。阐明了电荷密度和分子量对膨润土稳定性的影响。混凝剂和絮凝剂合适剂量的选择被证明是浊度的非线性函数。阐明了电荷密度和分子量对膨润土稳定性的影响。混凝剂和絮凝剂合适剂量的选择被证明是浊度的非线性函数。

更新日期:2021-08-25
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