The Swelling Kinetics Study of Hydrogels Prepared by the Different Finesses Degrees of Eupatorium Adenophorum

Hai Bo Wen; Xin Gao; Heng Zhang

doi:10.4028/www.scientific.net/AMR.690-693.1615

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The Swelling Kinetics Study of Hydrogels Prepared by the Different Finesses Degrees of Eupatorium Adenophorum

Abstract:

In this study the different finesses degree of the pulverized Eupatorium Adenophorum (EA) was evaluated as potential raw materials for the low-cost hydrogels whose the swelling behaviors were compared and studied at the same graft-copolymerization condition. The results are shown that the absorbency of EA hydrogels increased with decreasing the granule size of pulverized EA from 0.450mm to 0.063mm, while the swelling ratios gradually decreased with continuously reducing the particles size to 0.020mm, and the swelling exponents have been found to indicate non-Fickian mechanism for EA hydrogels at the all finesses range of 0.020~0.450mm. Moreover, to obtain better model for above 60% water uptake, the Beren-Hopfenberg differential model was applied, which also enabled to calculate the relaxation constants.