A New Approach for the Flocculation Mechanism of Chitosan.

Autor:	Chen, Liang1 chliang@dhu.edu.cn, Chen, Donghui2, Wu, Chongliang2
Předmět:	Fluorescence Pyrene Chitosan Physical & theoretical chemistry Molecular weights Colloids
Zdroj:	Journal of Polymers & the Environment. Jul2003, Vol. 11 Issue 3, p87-92. 6p.
Abstrakt:	A peak III/I ratio (δpeak) in pyrene-fluorescence spectrum was used to measure the polarity of microenvironment of chitosan adsorbing pyrene molecules. The authors detected the pyrene-fluorescence spectrum of chitosan with different degrees of deacetylation (DD) and determined the relationship between the flocculation of bentonite colloid and the δpeak of chitosan with a different molecular weight (MW) and DD. It can be concluded that MW rather than DD plays a key role in the flocculation and that bond bridging rather than charge neutralization dominates the flocculation with chitosan from a microenvironmental structure of view. [ABSTRACT FROM AUTHOR]
Databáze:	GreenFILE
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