层层组装微胶囊的制备及其缓释性能

纺织学报 ›› 2015, Vol. 36 ›› Issue (03): 58-62.

层层组装微胶囊的制备及其缓释性能

收稿日期:2014-03-31 修回日期:2014-05-28 出版日期:2015-03-15 发布日期:2015-03-16
通讯作者: 张健飞 E-mail:zhangjianfei1960@126.com

Preparation and controlled release of microcapsules via Layer-by-Layer assembly

Received:2014-03-31 Revised:2014-05-28 Online:2015-03-15 Published:2015-03-16
Contact: Zhang Jian-Fei E-mail:zhangjianfei1960@126.com

摘要/Abstract

摘要：

为研究聚电解质微胶囊对水溶性物质及染料的缓释作用，采用聚苯乙烯磺酸钠（PSS）调节碳酸钙（CaCO3）微粒的生长，将聚丙烯胺盐酸盐（PAH）和PSS在其表面进行层层组装，用乙二胺四乙酸（EDTA）将CaCO3微粒溶解去除，制得中空聚电解质微胶囊。将水溶性的罗丹明B包埋到微胶囊内部，研究组装层数、pH值大小、盐浓度对罗丹明B释放行为的影响。结果表明：层数越多，其囊壁越厚，渗透性越差，组装层数为7时，有最大的释放量；包埋罗丹明B的微胶囊在不同pH条件下都能实现释放，且释放趋势相同，但酸性条件下的释放速度和释放量大于中性及碱性条件；盐浓度低于0.05 mol/L时，释放量和释放速度均得到很大提高，继续增加盐浓度，释放速率反而降低。

关键词: 聚电解质微胶囊, 层层组装, 染料, 缓释

Abstract:

In order to study the sustained release of water-soluble substances or dyes from microcapsules, polystyrene sulfonate (PSS) was choose to adjust the growth of calcium carbonate (CaCO3) particles. Poly(allyamine hydrochloride) (PAH) and PSS were assembled on the template surface, and ethylenediamine tetraacetic acid (EDTA) was used to remove CaCO3 particles, then hollow polyelectrolyte microcapsules were obtained. The water-soluble Rhodamine B (RhB) embedded into the microcapsules. The effect of layers, pH and salt concentration on release behavior of RhB from microcapsules were studied. The results showed that: there was a similar release behavior of encapsulated RhB at different pH, while the release rate and amount at acidic conditions were greater than the neutral and alkaline conditions; the permeability was decreased with increasing the number of layers, the largest release amount occurred when assembled seven layers; salt concentration less than 0.05 mol/L was better for improving the release rate, and increasing the concentration would reduce the rate.

Key words: polyelectrolyte microcapsule, layer by layer assembly, dyes, controlled release

中图分类号:

TS195，TB34

张维李秋瑾张健飞. 层层组装微胶囊的制备及其缓释性能[J]. 纺织学报, 2015, 36(03): 58-62.

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