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首页> 外文期刊>Polymers for advanced technologies >Porous, bicontinuous, and cationic polyelectrolyte obtained by high internal phase emulsion polymerization
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Porous, bicontinuous, and cationic polyelectrolyte obtained by high internal phase emulsion polymerization

机译：通过高内相乳液聚合获得的多孔，双周末和阳离子聚电解质

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In this work, a cationic polyelectrolyte was synthesized through oil-in-water high internal phase emulsion polymerization. The porous polymer was obtained using the monomer (4-vinyl benzyl)trimethylammonium chloride and cross-linked with N,N-methylene-bis-acrylamide; additionally, ethylene glycol dimethacrylate (EGDMA) was used as the second cross-linker, which was solubilized in the discontinuous phase leading to a bicontinuous-like HIPE system because of the characteristics of this cross-linker and the phase, where polymerized several effects on the polyHIPE were expected. In this way, the effect of the emulsifier and EGDMA content on the pore size, swelling, and rheological properties was assessed. It was observed that an increased concentration of the emulsifier in the polymerization decreased the pore size, narrowed its size distribution, and diminished the swelling capacity of the polymer. Additionally, the poly (HIPE) displayed a close-cell structure explained by the locus of initiation starting from the droplets of the emulsion. After the addition of EGDMA, the polymer exhibited a major decrease in pore size and a significant decrease in swelling attributed to the polymerized skin layer on the droplet and hydrophobicity provided by the polyEGDMA, respectively. Rheological assays revealed an increase in the complex modulus and shear stress as the pore size decreased, but the addition of EGDMA did not produce an increase in the modulus, as expected. Finally, the sorption capabilities of the cationic porous polymers were evaluated through kinetic and isotherm sorption experiments using the anionic dye Acid Black 24.
机译：在这项工作中，通过水包油高内相乳液聚合合成阳离子聚电解质。使用单体（4-乙烯基苄基）三甲基氯化铵得到的多孔聚合物，与N，N-甲基双丙烯酰胺交联;另外，使用乙二醇二甲基丙烯酸酯（EGDMA）作为第二交联剂，其在不连续阶段中溶解，导致具有这种交联剂和该相的特性，该阶段在不连续的阶段，导致双连续的皮层系统，其中聚合有几个效果预期聚丙烯。以这种方式，评估乳化剂和EGDMA含量对孔径，肿胀和流变性质的影响。观察到，聚合中乳化剂的浓度增加降低了孔径，缩小其尺寸分布，并降低了聚合物的溶胀容量。另外，Poly（HIPE）显示由乳液的液滴开始的引发基因座解释的近距离结构。在添加EGDMA之后，聚合物在粒径上表现出孔径的重大降低，并且分别对聚焦和由聚焦提供的液滴和疏水性造成聚合的皮肤层的显着降低。随着孔径降低，流变测定显示复杂模量和剪切应力的增加，但是根据所预期的，添加EGDMA的添加不会产生模量的增加。最后，通过使用阴离子染料黑24通过动力学和等温吸附实验评估阳离子多孔聚合物的吸附能力。

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