Layer By Layer Techniques For Making Microcapsules

1481 WordsDec 18, 20146 Pages
Layer-by-Layer Approach for Making Microcapsules Muhammad Faiz Omar (201308264) 4th December 2014 Abstract The fabrication of hollow multilayer microcapsules in the beginning is initiated by layer-by-layer (LbL) self-assembly technique of oppositely charged polyelectrolyte on colloidal template followed by core decomposition. The main concept of microencapsulation is to protect the contents of fabricated microcapsules from the harmful environment in which it is surrounded. In this literature review, I shall outline the technique of microcapsules encapsulation employing LbL approach, lists of polyelectrolytes and templates and application of microcapsules. Introduction Over the past decades, nanometre-sized or known as microcapsules have been benefited the approach of Layer-by-Layer(LbL) technique due to the ability of tailoring their properties(e.g., size , shape, colloidal stability, surface-functionality, composition) that are biocompatible and biodegradable.1-3,10They are broadly used in many applications including food technologies, cosmetics, textiles industry and pharmaceuticals. The LBL assembly of multilayers are fundamentally built up by the alternating deposition of oppositely charged polyelectrolytes onto a sacrificial template such that the charge oscillates between positive and negative with each layer.1,4 The establishment of nanocoatings using LbL assembly method distinguishes itself in its intelligibility compared to the more conventional method. The

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