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首页> 外文期刊>Journal of Microencapsulation: Microcapsules Liposomes Nanoparticles Microcells Microspheres >Extraction of metal cations by polyterephthalamide microcapsules containing a poly(acrylic acid) gel
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Extraction of metal cations by polyterephthalamide microcapsules containing a poly(acrylic acid) gel

机译：含有聚（丙烯酸）凝胶的聚对苯二甲酰胺微胶囊提取金属阳离子

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摘要

Polyterephthalamide microcapsules containing a poly(acrylic acid)gel as a macromolecular ligand (PAA-CAPS) were prepared using an original two step polymerization process in a water-in-oil inverse emulsion system. A polyamide microcapsule containing acrylic acid, initiator and cross-linking agent, is formed by interfacial polycondensation of terephthaloyl dichloride with hexamethylenediamine. In situ radical polymerization of the microcapsule core acrylic acid is initiated to obtain encapsulated poly(acrylic acid) gel. Reference polyamide microcapsules, i.e. without ligand (CAPS), were also synthesized. The mean diameter of synthesized microcapsules was 210 #mu#m, and the microcapsule wall thickness was evaluated by SEM and TEM observations of microcapsule cross-section cuts. The microcapsule water content was determined by thermogravimetric experiments. The extractabilities of Cu(II), Ni(II), Co(II) and Zn(II) into PAA-CAPS were examined. The stripping of the various cations can be promoted in diluted hydrochloric acid solutions.
机译：在油包水反相乳液体系中，采用原始的两步聚合工艺制备了包含聚丙烯酸丙烯酸作为大分子配体的聚对苯二甲酰胺微囊（PAA-CAPS）。含有丙烯酸，引发剂和交联剂的聚酰胺微胶囊是通过对苯二甲酰二氯与六亚甲基二胺的界面缩聚反应形成的。微胶囊芯的丙烯酸的原位自由基聚合被引发以获得封装的聚（丙烯酸）凝胶。还合成了参考聚酰胺微胶囊，即没有配体（CAPS）。合成的微胶囊的平均直径为210＃μm，并且通过SEM和TEM观察微胶囊横截面的切口来评估微胶囊的壁厚。通过热重实验确定微胶囊的水含量。考察了铜（II），镍（II），钴（II）和锌（II）在PAA-CAPS中的可萃取性。在稀盐酸溶液中可以促进各种阳离子的剥离。

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