The use of cellulosic fibers as load bearing constituents in composite materials has increased over the last decade due to their relative cheapness compared to conventional materials such as glass and aramid fibers, their ability to recycle, and because they compete well in terms of strength per weight of material. All-Cellulosic based composites prepared from cellulose derivatives based matrices and microcrystalline cellulosic fibers made by direct coupling between fibers and matrix present interesting mechanical and gas permeation properties for the use as packaging materials. Both the cellulosic matrix and the fibers are biocompatible and widely used in the pharmaceutical industry which is very important for the envisaged application. Besides its biocompatibility cellulose derivatives have the ability to form both thermotropic and lyotropic chiral nematic phases and the composites produced from the latter show improved mechanical properties due to fiber orientation induced by the anisotropic matrix.The preparation and characterization (physico-chemical, mechanical, gas barrier properties) of all-cellulosic based composites are described in this chapter.
|Title of host publication||Cellulose Fibers: Bio- and Nano-Polymer Composites|
|Place of Publication||London; New York|
|ISBN (Print)||978-3-642-17369-1 / 978-3-642-17370-7|
|Publication status||Published - 1 Jan 2011|