A peak/ratio in pyrene-fluorescence spectrum was employed to measure the polarity of micro-environment of chitosan adsorbing pyrene molecules. The authors have in the first time detected the pyrene-fluorescence spectr...A peak/ratio in pyrene-fluorescence spectrum was employed to measure the polarity of micro-environment of chitosan adsorbing pyrene molecules. The authors have in the first time detected the pyrene-fluorescence spectrum of chitosan with different degrees of deacetylation (D.D.), and found the relationship between the flocculation of bentonite colloid by chitosan and the peak/ratio values of different molecular weight (M.W.) and D.D. of chitosan. We find that M.W. plays a key role in the flocculation, but D.D. has limited effect on it. From micro-environmental structure of view, it can be proved that the interparticle bridging rather than charge neutralization dominates the flocculation with chitosan.展开更多
文摘A peak/ratio in pyrene-fluorescence spectrum was employed to measure the polarity of micro-environment of chitosan adsorbing pyrene molecules. The authors have in the first time detected the pyrene-fluorescence spectrum of chitosan with different degrees of deacetylation (D.D.), and found the relationship between the flocculation of bentonite colloid by chitosan and the peak/ratio values of different molecular weight (M.W.) and D.D. of chitosan. We find that M.W. plays a key role in the flocculation, but D.D. has limited effect on it. From micro-environmental structure of view, it can be proved that the interparticle bridging rather than charge neutralization dominates the flocculation with chitosan.
