Premium
Studying flocculation mechanism of chitosan with pyrene‐fluorescence probe method
Author(s) -
Chen Liang,
Chen DongHui,
Wu ChongLiang
Publication year - 2003
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20030210924
Subject(s) - chemistry , chitosan , pyrene , flocculation , fluorescence , chemical engineering , colloid , benzopyrene , photochemistry , chemical physics , organic chemistry , benzo(a)pyrene , optics , physics , engineering
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 inter‐particle bridging rather than charge neutralization dominates the flocculation with chitosan.