CELL 23 |
| Recently, cellulose microfibril have been paid much attention as a new functional material. We have succeeded in making a cellulose nanofiber sheet (referred to as Cellulose Nanofiber nonwoven Fabrics, CNF) from two types of starting materials; i.e., bacterial cellulose (BC-) and the cellulose microfibrils (Co-) downsized from conventional pulp. Both types of CNF could be controlled the porosity or the degree of ventilation in a certain range. In case of the most porous samples for each CNF series, the SEM observation and the evaluation of specific surface area by a B.E.T. method showed fine average fiber diameters (65nm for BC-CNF and 40nm for Co-CNF) and very large surface area (110m2/g for BC-CNF and 160m2/g for Co-CNF), respectively. Preparation flow of CNF consists of the wet sheet making process by using a paper machine (containing continuous type) and the substitution process of wet paper from water to organic solvent before drying. The preparation technique of nanofiber sheet making and the specific features of these new materials will be introduced. |
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Structure and Properties of Cellulosic Polymers, Assemblies, and Nanocomposites
1:00 PM-4:45 PM, Sunday, April 6, 2008 Morial Convention Center -- Rm. R07, Oral
Division of Cellulose & Renewable Materials |