ABSTRACT
This chapter provides important findings in multilayer encapsulation and presents an explanatory overview of the same, highlighting the various facets, techniques, and utilities of the said encapsulation. Multilayered protection of the active compound from environmental stresses including fluctuations in ionic equilibria, pH, mechanical, thermal, and electrochemical shocks, is another advantage over single layer emulsions. Spray drying, an extensively practiced method of microencapsulation, has also been successfully employed for the development of multilayered encapsulates, as shown by a number of studies. Liposomal encapsulation is yet another technique widely employed for the encapsulation of bioactives. Estimation of the efficiency of one component multilayered liposome with potential biomedical applications, using synthetic polyvinyl alcohol has also been recently conducted. The electrospray technique is another method engaged in nanoencapsulation, wherein the feed ejects as a mist of droplets from the equipment employed when being transformed into a gas phase at a high speed and then falls onto a collector vessel.
