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Citation: WANG Ming-Zhen, QIANG Jun-Chao, FANG Yu, HU Dao-Dao. A Comparative Study of the Methods for in Situ Monitoring of Gelation Dynamics[J]. Chinese Journal of Applied Chemistry, ;2000, 17(6): 603-606. shu

A Comparative Study of the Methods for in Situ Monitoring of Gelation Dynamics

1.
Department of Chemistry, Shaanxi Normal University, Xi'an 710062

Received Date: 14 January 2000
Available Online: 10 April 2000
Fund Project: 国家自然科学基金(29973024) (29973024)陕西省自然科学基金(99H13) (99H13)

The usefulness and characteristics of some methods for in situ monitoring gelation dynamics have been studied, taking glutaraldehyde(Glu) crosslinked chitosan(CS) in acetic acid medium as a model system. It has been shown that the viscosity method is simple and direct. But it is unlikely to monitor the changes occurring after the gelling point of a gelation system. In addition, there is a perturbation to the gelling process from the rotationary viscosity measurements. The electroconductivity and photometric methods monitor the crosslin-king reaction, rather than the rheological changes. Therefore, the results may not be in consistent with that perceived through the senses. Among the methods tested, fluorescence probe method appears the first choice to monitor the gelation dynamics of various gelling systems due to the great number of probes and related fluorescence properties.
- hydrogel,
- formation,
- monitoring,
- fluorescence probe method
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