Loading and release of methyl orange in layer-by-layer assembled polyelectrolyte films
Loading and release of methyl orange in layer-by-layer assembled polyelectrolyte films
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DOI：
10.1016/j.msec.2008.09.016
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发表时间：
2009-04
期刊：
影响因子：
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通讯作者：
Hiroshi Sato;Rikumi Okuda;Ayami Sugiyama;Mayumi Hamatsu;J. Anzai
中科院分区：
文献类型：
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作者：
Hiroshi Sato;Rikumi Okuda;Ayami Sugiyama;Mayumi Hamatsu;J. Anzai
研究了甲基橙子（MO）在聚烯丙基胺盐酸盐（PAH）与聚乙烯硫酸盐（PVS）或聚苯乙烯磺酸盐（PSS）层层组装膜中的负载及其释放。阴离子染料MO可以通过静电引力结合到PAH-PVS和PAH-PSS膜上。MO在PAH-PVS膜中完全形成聚集体，而在PAH-PSS膜中发现MO的单体和聚集形式。负载的MO可以从膜释放到缓冲溶液中。释放曲线显着依赖于pH值和离子强度的介质中，MO被释放。在碱性介质中释放速率比在中性和酸性介质中快。在较高离子强度的介质中，由于屏蔽了膜中MO与正结合位点之间的离子相互作用，加速了释放。
The loading of methyl orange (MO) in layer-by-layer assembled thin films composed of poly(allylamine hydrochloride) (PAH) and poly(vinyl sulfate) (PVS) or poly(styrenesulfonate) (PSS) and its release from the films were studied. Anionic dye MO can be bound to the PAH-PVS and PAH-PSS films through electrostatic force of attraction. MO fully formed aggregates in the PAH-PVS films, while both monomeric and aggregated forms of MO were found in the PAH-PSS films. The loaded MO can be released from the films into buffer solutions. The release profiles significantly depended on pH and ionic strength of the medium in which MO was released. The release rate was faster in the basic solution than in neutral and acidic media. The release was accelerated in the media with higher ionic strength due to shielding of ionic interactions between MO and positive binding sites in the films.