Direct sulfation of bacterial cellulose with a ClSO3H/DMF complex and structure characterization of the sulfates

摘要: Bacterial cellulose (BC) is a form of synthesized by microorganisms, which has unique structure properties and differs from plant cellulose. Up to now, chemical modification BC not been studied widely. This paper aims prepare sodium bacterial sulfate (SBS) in N,N-dimethylformamide (DMF) with ClSO3H/DMF complex as the sulfating agent. SBSs diverse degree sulfation (DS, 0.04–0.86) were synthesized. The system could change heterogeneous homogeneous during sulfation. Regarding DS, optimal ClSO3H amount reaction time 6 mol/mol anhydroglucose unit 4 h, respectively. DS increased little when increasing temperature, while yield decreased significantly. DS > 0.24 soluble deionized water. Carbon nuclear magnetic resonance spectroscopy revealed that prefers take place order C-6 > C-2 > C-3. X-ray diffraction profiles indicated crystalline was destroyed better reactivity than microcrystalline both depolymerization processes. SBS potential biomaterial. However, depolymerized obviously present sulfation, forbids application material. Moisture mixture should be removed completely possible guarantee efficient decrease depolymerization. Copyright © 2013 John Wiley & Sons, Ltd.