Chemical composition fibrous networks

Articular cartilage is a complex composite polymeric material that consists principally of a network of collagen (in various states of aggregation), protein-polysaccharides, living cells (chondrocytes) and Inorganic ions. The latter are primarily counterions to the charged moieties of the polyelectrolytes of the matrix. The entire network is swollen with water, a major fraction of which is in regions between its fibrous elements. On compression this water is exuded. The tissue s network structure, composition, and equilibrium fluid contents vary with depth from the surface ( >A> ) Its structure and chemical composition have been extensively reviewed ... 

Wood, a lignocellulosic polymer composite, contains a fibrous structure of cellulose, hemicellulose, and a three-dimensional network of lignin and several extractives (Table 4.7). Figure 4.18 shows the chemical components of a typical softwood cell wall [650]. 

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