Effect of UV-Irradiation on Polyelectrolyte Multilayered Films and Hollow Capsules Prepared by Layer-by-Layer Assembly
Effect of UV-Irradiation on Polyelectrolyte Multilayered Films and Hollow Capsules Prepared by Layer-by-Layer Assembly
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DOI：
10.1021/ma0615598
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发表时间：
2006-10
期刊：
影响因子：
5.5
通讯作者：
Kiyofumi Katagiri;A. Matsuda;F. Caruso
中科院分区：
文献类型：
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作者：
Kiyofumi Katagiri;A. Matsuda;F. Caruso
聚合物多层膜组装到平面和颗粒基板上的交替吸附带相反电荷的聚电解质。从涂覆的三聚氰胺甲醛（MF）颗粒中除去模板产生中空的纳米胶囊。通过透射电子显微镜（TEM）、傅里叶变换红外（FT-IR）光谱和石英晶体微重分析（QCM）研究了不同强度和时间的紫外光照射后胶囊的形貌和化学结构的变化。显著收缩的胶囊后，观察到紫外线照射的胶囊与聚电解质轴承芳族基团，如聚（4-苯乙烯磺酸钠）（PSS）。由PSS和聚二烯丙基二甲基氯化铵（PDDA）组成的五层双层胶囊收缩至约100 μ m。20%的原始直径后，紫外线照射（20 mW cm-2，365 nm）120分钟。相比之下，可忽略不计的收缩，观察到由聚电解质形成的胶囊没有…
Polymer multilayered films were assembled onto planar and particle substrates by the alternate adsorption of oppositely charged polyelectrolytes. Removal of the template from the coated melamine formaldehyde (MF) particles yields hollow polyelectrolyte capsules. The changes in morphology and chemical structure of the capsules after exposure to UV light over a range of intensities and time were characterized by transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, and quartz crystal microgravimetry (QCM). Pronounced shrinkage of the capsules was observed after UV irradiation for capsules formed with polyelectrolytes bearing aromatic groups, such as poly(sodium 4-styrenesulfonate) (PSS). Capsules composed of five bilayers of PSS and poly(diallyldimethylammonium chloride) (PDDA) shrunk to ca. 20% of their original diameter after UV irradiation (20 mW cm-2 at 365 nm) for 120 min. In contrast, negligible shrinkage was observed for capsules formed from polyelectrolytes without...