Samples of microcrystalline cellulose (MCC) were studied using X-ray photoelectron spectroscopy before and after sulfation. It was established, that the reaction of MCC with chlorosulfonic acid in dioxane solvent results in an introduction of sulfate groups into cellulose structure. The sulfur content in sulfated MCC is varied between 4,0-9,7 % atomic and the sulfur is present in a form of sulfate. The content of sulfur on the surface and into the bulk of MCC sulfates was compared. The observed

more »

... difference in shapes of 1s lines of carbon in spectra of initial and sulfated MCC samples points on the change of the electron state of a part of carbon atoms after sulfation.