About “Haze” in cellulose nanopaper

The opaqueness of standard paper originates from the presence of empty spaces among fibers: the presence of air and other fillers yields a material with a discontinuous refractive index. This causes scattering of light in the backward direction and is the reason why we cannot look through a sheet of paper. This limit represents, actually,Continue reading “About “Haze” in cellulose nanopaper”

Ashby plots help comparing properties and potentialities of natural materials

Evaluation of materials properties for a selected application necessarily requires a method to compare different material sources. This is particularly true in the case of natural materials, those biocompatible and renewable constituents that can be extracted from biologic tissues. Natural materials often come in the form of composites. Just think, for instance, about a humanContinue reading “Ashby plots help comparing properties and potentialities of natural materials”

About cellulose

Formal discovery of cellulose, the structural material of plants, dates 1838 in the work of Anselme Payen,1 a French chemist also known for the discovery of the enzyme diastase. Cellulose technological importance is mainly connected to paper industry, even if cellulose derivatives, like rayon and cellophane, are part of our life for decades. Additional challengesContinue reading “About cellulose”

Why Nanopaper?

Considering the outmost attention put by the European Community on biodegradable and renewable plastics, the cellulose nanopaper (CNP), consisting of transparent and flexible paper sheets that are completely biodegradable, can find straightworward technological application in packaging, coating and many other applications. Nanopaper is a self-standing transparent film, that can be produced by deposition of nanocellulose crystals or fibers. With regard to chemicalContinue reading “Why Nanopaper?”