نوع مقاله: تالیفی
نویسندگان
1 گروه مهندسی پلیمر، دانشکده مهندسی شیمی، دانشگاه صنعتی اصفهان، اصفهان، ایران
2 عضو هیئت علمی، گروه مهندسی پلیمر، دانشکده مهندسی شیمی، دانشگاه صنعتی اصفهان، اصفهان، ایران
3 گروه مهندسی مواد وپلیمر، دانشکده مهندسی، دانشگاه حکیم سبزواری، سبزوار، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Nowadays, the microcapsulation of materials is utilized extensively in different fields and industries including agriculture, food and pharmaceutical materials, coatings, and cosmetics. One of the most important applications of microcapsules is in the preparation of self-healing polymer composites, and poly (urea-formaldehyde) (PUF) microcapsules are very considerable in preparation of these systems, due to their suitable properties. However in some cases these microcapsules are not able to interact properly with polymeric matrix, and therefore, this leads to a reduction in mechanical properties of matrix and restriction of appropriate transition of applied stress to microcapsules (and hence, reduction of self-healing function) as well. Modification of microcapsules in order to reinforce the matrix-microcapsule interactions and improvement of microcapsules properties, is an effective approach for reduction of the drop in mechanical properties and improvement of stress transition to microcapsules. According to the literature, the modification methods of PUF microcapsules can be classified into 4 main groups including; modification via silane coupling agents, modification during synthesis, modification by using nanoparticles, and preparation of multishell microcapsules via layer-by-layer deposition method.
In this study, first, microcapsules and factors affecting their effectiveness, methods of encapsulation, and microcapsule based self-healing systems are explained briefly. Then, especially PUF microcapsules and modification methods of them are investigated.
کلیدواژه‌ها [English]
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