The coarseness and length of natural wood or cotton-linter cellulosic fibers may vary depending on the origin, geography and age of the plant. There are tools known by cellulose pulp experts to control or modify fiber geometry but only to a limited extent since the basic parameters have been already defined by Mother Nature. Cellulosic fiber webs possess excellent absorbent properties, in large part because of their high surface energy. Water-based liquids, depending on their liquid rate constant
sites (plurality of hydroxyl and some amount of carboxyl groups) which enable them to serve as ideal carriers of useful functional components which can be chemically attached to the polymer functional groups or be physically bound within the fiber micropores (Fig. 7). Depending on the need these functional agents can be permanently immobilized on the cellulose matrix or be released to the medium during the use of the system.
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