The Ion Exchange Preliminary Study Of The Synthesis Of Bacterial Cellulose And Its Adsorption Properties

In this work, bacterial cellulose ion-exchanger, such as bacterial cellulose xanthate, bacterial cellulose sodium sulfate, 2-hydroxy-3-sulfpropyl-bacterial cellulose Na salt , ethylenediamine chelating bacterial cellulose, polyethylenepolyamino bacterial cellulose were synthesized by bacterial cellulose. The properly synthetic conditions and the characteristics of adsorption to copper ions were systemically studied. The samples were also characterized by TEM, X-ray diffraction, FT-IR and elemental analysis.The bacterial cellulose xanthate exhibited the optimal performance on copper ions in the progression of adsorption. The adsorptive reaction was completed in twenty five minutes with a fast and steady course. The kinetic data could be well modeled by the pseudo-second order equation.The synthesis of cross-linked bacterial cellulose from epoxy chloropropane in the presence of alkali medium were described. Strong cation exchanger bacterial cellulose sodium sulfate was prepared by the reaction of cross-linked bacterial cellulose with sulfuric acid. Under the optimum condition, the exchange capacity of bacterial cellulose sodium sulfate was 2.87mmol/g. Strong cation exchanger 2-hydroxy-3-sulfpropyl-bacterial cellulose Na salt was synthesized by cross-linked bacterial cellulose and sodium 3-chloro-2-hydroxy propanesulfate, which exchange capacity was 0.481mmol/g .under the optimum conditionThe cellulose-ether was synthesized by epoxy chloropropane and the bacterial cellulose pretreated by the sodium hydroxide. Ethylenediamine chelating bacterial cellulose and polyethylenepolyamino bacterial cellulose were synthesized from cellulose-ether carrier by grafting with ethylenediamine and polyethylenepolyamino, respectively. The absorptive characteristics of ethylenediamine chelating bacterial cellulose for copper ions of static state were studied, which characteristics included absorption capacity, absorption dynamics and isothermal etc. The tests indicated that the polyethylenepolyamino bacterial cellulose exhibited high adsorptive capacity to copper ions and good property for being repeated use.