PRODUCTION OF OIL-CONTAINING POLYTEREPHTHALAMIDE MICROCAPSULES BY INTERFACIAL POLYMERIZATION - AN EXPERIMENTAL INVESTIGATION OF THE EFFECT OF PROCESS VARIABLES ON THE MICROCAPSULE SIZE DISTRIBUTION

被引：25

作者：

ALEXANDRIDOU, S ^{[1
]}

KIPARISSIDES, C ^{[1
]}

机构：

[1] ARISTOTELIAN UNIV THESSALONIKI,DEPT CHEM ENGN,THESSALONIKI,GREECE

来源：

JOURNAL OF MICROENCAPSULATION | 1994年 / 11卷 / 06期

关键词：

D O I：

10.3109/02652049409051110

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Oil-containing polyterephthalamide microcapsules were prepared by the interfacial polymerization technique. The inner phase of the microcapsules consisted of a mixture of an organic solvent, toluene, and a commercial oil, santosol. Microcapsules with mean Sauter diameters in the range 0.5-20 mum were prepared by varying the rate of agitation (2000-7000 rpm) and the concentration of a poly(vinyl alcohol) stabilizer (0.1-1.0wt% w/v), in the presence of several ionic and non-ionic cosurfactants. High agitation rates resulted in a significant reduction of the mean size of the oil droplets, although a slight increase in the breadth of the droplet size distribution was observed. High concentrations of PVA also resulted in a decrease of the microcapsule size, although the effect of stabilizer concentration was generally less important than that of the agitation speed. Finally, the effect of various ionic and non-ionic cosurfactants on the microcapsule size distribution was investigated. It was found that the addition of a cosurfactant significantly reduced the mean droplet size of the initial emulsion, leading to the formation of microcapsules in the submicron range.

引用

页码：603 / 614

页数：12

共 8 条

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