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Application of Spherical Polyelectrolyte Brushes Microparticle System in Flocculation and Retention

机译：球形聚电解质刷微粒体系在絮凝和保留中的应用

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摘要

In this paper, a microparticle system consisting of cationic polyacrylamide (CPAM) and anionic spherical polyelectrolyte brushes (ASPB) is proposed to improve the retention of pulp suspension containing bleached reed kraft pulp and precipitated calcium carbonate (PCC). We first describe the preparation of ASPB. The ASPB, consisting of a carbon sphere (CS) core and a shell of sodium polystyrene sulfonate (PSSNa) brushes, was synthesized by surface-initiated polymerization. The structure and morphology of ASPB were characterized by Fourier-transform infrared spectrometry (FTIR), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). Then, flocculation and retention of pulp suspension by a CPAM/ASPB dual-component system were examined. Our results indicate that more highly effective flocculation and higher retention efficiency could be achieved simultaneously by a CPAM/ASPB dual-component system when compared to the conventional microparticle system. Bridging flocculation and electrostatic attraction might be the main flocculation mechanism for CPAM/ASPB systems.
机译：本文提出了一种由阳离子聚丙烯酰胺（CPAM）和阴离子球形聚电解质刷（ASPB）组成的微粒体系，以提高纸浆悬浮液的保留性，该纸浆悬浮液包含漂白的芦苇牛皮纸浆和沉淀的碳酸钙（PCC）。我们首先描述ASPB的编写。通过表面引发的聚合反应合成了由碳球（CS）核和聚苯乙烯磺酸钠（PSSNa）刷壳组成的ASPB。用傅立叶变换红外光谱（FTIR），场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）对ASPB的结构和形貌进行了表征。然后，通过CPAM / ASPB双组分系统检查了纸浆悬浮液的絮凝和保留情况。我们的结果表明，与传统的微粒系统相比，CPAM / ASPB双组分系统可以同时实现更高效的絮凝和更高的保留效率。桥接絮凝和静电吸引可能是CPAM / ASPB系统的主要絮凝机理。

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