Phosphorescence and fluorescence of fibrillar cellulose films

Celluloses and nanofibrillar celluloses, and the basis of their luminescence are studied. Comparative studies of photoluminescence of birch kraft pulp and microfibrillar and nanofibrillar celluloses manufactured from the same pulp were made with the aim to investigate their luminescence properties. Comparison was made with the earlier literature and the origin of the photoluminescence of these cellulose variants is discussed.