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首页> 外文期刊>Polymers >Evaluation of the Performance of Dual Polyelectrolyte Systems on the Re-Flocculation Ability of Calcium Carbonate Aggregates in Turbulent Environment
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Evaluation of the Performance of Dual Polyelectrolyte Systems on the Re-Flocculation Ability of Calcium Carbonate Aggregates in Turbulent Environment

机译：湍流环境下双聚电解质体系对碳酸钙骨料再絮凝能力的评价

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Flocculation can be used in turbulent environments resulting in floc breakage due to shearing. The degree of re-flocculation relates directly to product quality and process efficiency. This study aimed at looking for alternatives to improve the re-flocculation ability of aggregates when polyelectrolytes (PEL) are used as flocculation agents. Moreover, because branched PEL have proved previously to lead to high flocculation efficiencies, the work presented focus on the improvement of the re-flocculation ability of branched PEL. Thus, a selection of branched polymers were used primarily as flocculation aid and after flocs break up a linear polymer was added to the system in order to improve re-flocculation. Different mixtures were tested with the objective to try to induce, during re-flocculation, complementary flocculation mechanisms, favoring the patching mechanism. Re-flocculation improved significantly with this strategy. Laser Diffraction Spectroscopy was used to monitor the flocculation and re-flocculation processes supplying information about the floc size and structure. Since inorganic materials, namely bentonite, have been widely used to improve the re-flocculation capacity of polyelectrolytes, the results of using dual polyelectrolyte systems were compared with the effect of adding bentonite to the system.
机译：絮凝可用于湍流环境中，由于剪切作用导致絮体破裂。再絮凝的程度直接关系到产品质量和工艺效率。这项研究旨在寻找替代方法，以在将聚电解质（PEL）用作絮凝剂时提高聚集体的再絮凝能力。此外，由于支链PEL先前已被证明可导致较高的絮凝效率，因此提出的工作集中在提高支链PEL的再絮凝能力上。因此，主要使用选择的支化聚合物作为絮凝助剂，并且在絮凝物破碎后，将线性聚合物添加到系统中以改善再絮凝。测试了不同的混合物，目的是试图在再絮凝过程中诱导互补的絮凝机制，从而有利于修补机制。通过这种策略，重新絮凝得到了显着改善。激光衍射光谱法用于监测絮凝和再絮凝过程，提供有关絮凝物尺寸和结构的信息。由于无机材料，即膨润土，已被广泛用于提高聚电解质的再絮凝能力，因此将使用双聚电解质体系的结果与向体系中添加膨润土的效果进行了比较。

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