Preparation Of Bagasse Celluloses Containing Amine Group And Their Adsorption Behavior

Cellulose, a kind of excellent natural products of extensiveness, importance, and cheapness. In recent years, with decreasing oil resources and rising prices of oil and its products, interest in the production of polymer materials from cellulose, a highly important polymer, grows steadily.This paper has synthesized a kind of cellulose based adsorption material with good adsorption performance by grafting one monomer (diethylenetriamine) having active functional groups onto the bagasse cellulose by solution polymerization and microwave irradiation graft copolymerization, the amine group possess strong chelating ability for heavy metal ions and adsorptive capacity for formaldehyde. Effects of the grafting conditions in the solution polymerization, such as initiator concentration, initiate time, the ratio of monomer/cellulose, reaction temperature, reaction time and in the microwave irradiation graft copolymerization, such as the ratio of initiator/cellulose, initiate time, the ratio of monomer/cellulose, reaction power, reaction time on the Zeta potential were investigate. The surface morphology, chemical structure, crystal morphology of the natural bagasse cellulose and grafted cellulose were characterized with Fourier transform infrared spectroscopy(FT-IR), scanning electron microscopy(SEM), X-ray diffraction(XRD)test. Adsorption performances of the grafted cellulose to the heavy metal ions and formaldehyde were investigated.1. Grafted cellulose Cell-DETA was prepared by solution grafting copolymerization of diethylenetriamine onto natural bagasse cellulose through the free radical initiated copolymerization methods.and using cetric ammonium nitrate (CAN) as an initiator. The results show that the Zeta potential of grafted cellulose can reach Maximum under conditions (initiator concentration40mmol/L, initiate time20min, the ratio of monomer/cellulose1:1, reaction temperature70℃, reaction time3h).2. Grafted cellulose Cell-DETA was prepared by microwave irradiation graft copolymerization of diethylenetriamine onto natural bagasse cellulose through the free radical initiated copolymerization methods.and using cetric ammonium nitrate (CAN) as an initiator. The results show that the Zeta potential of grafted cellulose can reach Maximum under conditions (the ratio of initiator/cellulose0.25:1, initiate time3min, the ratio of monomer/cellulose0.8:1, reaction power300W, reaction time10min).3. The adsorption performance forCr6+and Cu2+are determined. The results show that the adsorption capacity best respectively under the conditions(Cr6+: pH4.5, adsorption time90min, Cr6+concentration100mg/L; Cu2+:pH=4, adsorption time60min, Cu2+concentration400mg/L). The adsorption behavior of Cell-DETA is in good accordance with Langmuir isotherm model. The adsorption process in good conform to second order rate equation.4. The adsorption performance for formaldehyde are determined. The results show that the adsorption capacity best under the conditions (maldehyde concentration500mg/L, adsorption temperature70℃, adsorption time60min) The adsorption behavior of Cell-DETA is in good accordance with Langmuir isotherm model and Freundlich isotherm model. The adsorption process in good conform to second order rate equation.