Effects of salt on intermolecular polyelectrolyte complexes formation between cationic microgel and polyanion.
Effects of salt on intermolecular polyelectrolyte complexes formation between cationic microgel and polyanion.
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DOI：
10.1016/j.cis.2015.09.005
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发表时间：
2015-12
影响因子：
15.6
通讯作者：
K. Ogawa
中科院分区：
文献类型：
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作者：
K. Ogawa
研究了阳离子微凝胶与聚阴离子形成聚电解质间络合物(IPEC)。阳离子微凝胶的尺寸和相对分子质量远大于线性阴离子聚电解质。通过动态光散射(DLS)、静态光散射(SLS)和浊度或光谱对IPEC进行了划分：(I)由线性聚电解质结合的微凝胶组成的水溶颗粒内络合物；(Ii)复杂凝聚体(由聚集的颗粒内络合物组成的颗粒间络合物)；以及(Iii)不可溶的无定形沉淀物。这些类型不仅取决于聚阴离子和阳离子微凝胶的混合比例，而且还取决于盐的浓度。从IPEC的组成、IPEC形成的热力学以及盐对IPEC形成中分子间相互作用的影响等方面对这一趋势进行了讨论。微凝胶在IPEC研究中的应用结果表明，在IPEC的聚集或缔合过程中，不仅静电相互作用，而且疏水相互作用也起着重要作用。
The study of interpolyelectrolyte complex (IPEC) formation between cationic microgel and polyanion was presented. The size and molecular weight of cationic microgel are much larger than those of linear anionic polyelectrolyte. The resulting IPEC was divided by dynamic light scattering (DLS), static light scattering (SLS), and turbidity or spectrometry; (i) water-solubleintra-particle complexes consisting of one microgel to which linear polyelectrolytes bind; (ii) complex coacervates (inter-particle complexes composed of aggregatedintra-particle complexes); and (iii) insoluble amorphous precipitates. These types depended on not only the mixing ratio of polyanion to cationic microgel but also salt concentration. This trend was discussed from IPEC's composition, thermodynamics of IPEC formation and the salt effect on intermolecular interactions which were expected in IPEC formation. The results obtained from the use of microgel in IPEC's study suggested that not only electrostatic interaction but also hydrophobic interaction play an important role in the aggregation or association of IPEC.