Transport Behavior of Heterogeneous Polyelectrolyte Gels
碩士 === 國立臺灣科技大學 === 纖維工程技術系 === 82 === The effects of structure and water content on the penetrant transport properties and solute diffusion behavior of inhomogeneous, ionic poly (acrylonitrile-co-acrylamide-co- acrylic acid) hydrogels wer...
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
1994
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| Online Access: | http://ndltd.ncl.edu.tw/handle/51939889171400023895 |
| Summary: | 碩士 === 國立臺灣科技大學 === 纖維工程技術系 === 82 === The effects of structure and water content on the penetrant
transport properties and solute diffusion behavior of
inhomogeneous, ionic poly (acrylonitrile-co-acrylamide-co-
acrylic acid) hydrogels were investigated. The swelling
kinetics of water in the initially glassy polymers were
followed. Influences of temperature on diffusion mechanism
of benzoic acid in swollen hydrogels is analyzed by the
free volume. The results of swelling measurements
showed that the initial sorption rate of penetrant in
glassy polymers were reduced with increasing water content of
hydrogels. The penetrant transport mechanism of the highly
crosslinked hydrogels exhibited anomalous type. Both the
swelling-related free volume of hydrogels and thermal effects
influence diffusion behavior of solute in our systems.
The solute diffusion mechanism of hydrogels with lower
acrylic acid content deviates free volume theory. The mesh
size of hydrogels was increased with increasing water
content of hydrogels developed by scaling law. An increase
in mesh size promoted the motion of solute, resulting
in an increase in solute diffusion coefficient.
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