Synthesis and medico-biological properties of low-substituted cellulose phosphates
The process of cellulose fiber esterification by dilute (0.3-0.8 mol/dm <sup>3</sup>) orthophosphoric acid water solutions in presence of urea under various conditions has been investigated. Low-substituted cellulose phosphates containing 0.25-0.5 mmol/g of phosphorus, have been prepared. Physical, chemical and medico-biological properties of cellulose phosphates obtained have been studied. It has been shown that they fit the medico-biological safety criteria, including biocompatibility indicators and possibility of use as medicine materials.