Gelation process visualized by aggregation-induced emission fluorogens.

Abstract:

:Alkaline-urea aqueous solvent system provides a novel and important approach for the utilization of polysaccharide. As one of the most important polysaccharide, chitosan can be well dissolved in this solvent system, and the resultant hydrogel material possesses unique and excellent properties. Thus the sound understanding of the gelation process is fundamentally important. However, current study of the gelation process is still limited due to the absence of direct observation and the lack of attention on the entire process. Here we show the entire gelation process of chitosan LiOH-urea aqueous system by aggregation-induced emission fluorescent imaging. Accompanied by other pseudo in situ investigations, we propose the mechanism of gelation process, focusing on the formation of junction points including hydrogen bonds and crystalline.

journal_name

Nat Commun

journal_title

Nature communications

authors

Wang Z,Nie J,Qin W,Hu Q,Tang BZ

doi

10.1038/ncomms12033

subject

Has Abstract

pub_date

2016-06-23 00:00:00

pages

12033

issn

2041-1723

pii

ncomms12033

journal_volume

7

pub_type

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