Год выпуска: 2010 Автор: Ranjit Thakur Издательство: LAP Lambert Academic Publishing Страниц: 220 ISBN: 9783838359090
Описание
This dissertation deals with the production of nanostructured organic, inorganic and biopolymer materials using supercritical carbon dioxide. Over the past decade, supercritical fluids (SCFs) have emerged for particle formation due to SCFs adjustable solubility and significantly high diffusivity. Various methods have been developed, which can be classified into two basic processes: (a) rapid expansion of supercritical solutions (RESS) for processing CO2-soluble materials, (b) and supercritical antisolvent (SAS) for processing CO2-insoluble materials. In this work, further developments in both the methods have been made to overcome the existing challenges and to achieve new nanostructures. Chitin nanofibers are potentially of use in many biomedical and pharmaceutical applications. But, due to highly crystalline nature, it is very difficult to convert into a nanofibrous form. In this work, a SAS method is used to produce chitin nanofibers of average diameter 84 nm using...
