Dissolution and regeneration of cellulose from recycled papers with naoh/thiourea/urea aqueous solution

The regenerated celluloses were prepared by the dissolution of two different cellulosic materials derived from recycled papers in an aqueous-ba~ed solution of NaOH/thiourea/urea with the ratio of 8:6,5:8 by weight. The cellulose solutions were undergone freeze and thaw process before they were precipitated with the non-solvent, ethanol to form the regenerated cellulose, In another approach, cellulosic samples were cross-linked with sodium trimetaphosphate (STMP) in different mole ratios to identilY the highest degree of cross-linking of the regenerated crosslinked cellulose formed respectively. The products obtained were analyzed by their SEM micrographs and FfIR spectra, The results showed that the STMP has effective cross-linking action on the cellulosic samples and the SEM micrograph for the regenerated cross-linked cellulose showed that it had individual agglomerate with high porosity, brittle and rigid compared to that of regenerated cellulose without cross-linked which had several agglomerates joined together, These results lead to a conclusion that the regenerated cross-linked cellulose could be potential to be used in drug delivery