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首页> 外文期刊>Journal of Microencapsulation: Microcapsules Liposomes Nanoparticles Microcells Microspheres >Microencapsulation of fragrant oil via in situ polymerization: effects of pH and melamine-formaldehyde molar ratio
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Microencapsulation of fragrant oil via in situ polymerization: effects of pH and melamine-formaldehyde molar ratio

机译：原位聚合的芳香油微胶囊：pH和三聚氰胺 - 甲醛摩尔比的作用

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摘要

Microcapsules containing fragrant oil (Foral oil) were synthesized via the in situ polymeriation method using melamine-formaldehyde (M-F) as a wall material. The encapsulation efficiency and other physical properties were analysed with varying formaldehyde/melamine (F/M) mole ratio and pH of emulsion medium. The pH of the reaction medium was varied from 5.0-6.0 and the F/M molar ratio, 2.3 approx 5.5. Microcapsules containing fragrant oil were synthesized successfully and their particle sizes ranged from 12-15 mum. Encapsulation efficiency of fragrant oil varied from 67-81%. It was found that both pH and F/M molar ratio have an effect on the separation of M-F prepolymer, consequently the morphology of the suface of the microcapsule was changed as well as encapsulation efficiency. The encapsulation mechanism, focusing on the liquid-liquid phase separation of methylomelamines and formation of M-F precursor particle, was described to explain the surface morphology and encapsulation efficiency.
机译：通过以甲甲醛（M-F）为壁材料，通过原位聚合方法合成含有香油（锻造油）的微胶囊。通过改变甲醛/三聚氰胺（F / M）摩尔比和乳液介质的pH分析封装效率和其他物理性质。反应介质的pH值不同于5.0-6.0和F / m摩尔比，2.3约5.5。成功合成含有香油的微胶囊，其颗粒尺寸范围为12-15毫米。香油的封装效率从67-81％变化。发现pH和F / m摩尔比两种摩尔比对M-F预聚物的分离有影响，因此微胶囊的表面的形态改变以及封装效率。描述了专注于甲基胺的液相分离和形成M-F前体颗粒的封装机理，以解释表面形态和封装效率。

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