The aim of this study is to produce a lavender oil capsules with triblock copolymer and to use these capsules for providing scented paper. Thus, polyethylene oxide‐polypropylene glycol‐polyethylene oxide (PEO‐b‐PPG‐b‐PEO) ABA‐type block copolymer was synthesized by means of Atom Transfer Radical Polymerization and the chemical structure of PEO‐b‐PPG‐b‐PEO was characterized by ATR‐FTIR and ¹H‐NMR. Moreover, block ratio of the PEO‐b‐PPG‐b‐PEO was identified with ¹H‐NMR. Lavender oil was encapsulated in the polymer by micellization of interactions between hydrophilic‐lipophilic‐hydrophilic polymer and oil. These interactions include lavender oil and lipophilic block interaction and oil‐hydrophilic group repulsion. In addition, hydrophilic groups interacted with water to keep the micelles suspended. The critical micelle concentration and size of the micelles were analysed with SEM. Decomposition of capsules was determined by UV spectroscopy with respect to pH change. Paper coating formulations were prepared with fragrant capsules and coated on paper with laboratory‐type coating machine. The colour and gloss of obtained papers were determined by spectrophotometer and glossmeter. As a result, PEO‐b‐PPG‐b‐PEO polymer can be used to encapsulate lavender oil, and the resulting capsules have functioned without degradation in the paper coating.

中文翻译：

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用ABA型嵌段共聚物进行pH值控制的薰衣草油胶囊化及其在纸张涂料中的用途

这项研究的目的是生产具有三嵌段共聚物的薰衣草油胶囊，并使用这些胶囊提供香味纸。因此，通过原子转移自由基聚合合成了聚环氧乙烷-聚丙二醇-聚环氧乙烷（PEO-b-PPG-b-PEO）ABA型嵌段共聚物，PEO-b-PPG-b-PEO的化学结构为由ATR‐FTIR和¹ H‐NMR表征。此外，将PEO-b-PPG-b-PEO的嵌段比确定为¹1 H-NMR。薰衣草油通过亲水性-亲脂性-亲水性聚合物与油之间的相互作用的胶束化作用而被封装在聚合物中。这些相互作用包括薰衣草油和亲脂性嵌段相互作用以及油-亲水基团排斥。另外，亲水基团与水相互作用以保持胶束悬浮。用SEM分析临界胶束浓度和胶束大小。关于pH变化，通过UV光谱法确定胶囊的分解。用芳香胶囊制备纸涂料配方，并用实验室型涂布机将其涂布在纸上。用分光光度计和光泽度仪测定所得纸的颜色和光泽度。因此，PEO-b-PPG-b-PEO聚合物可用于封装薰衣草油，