Network and swelling parameters of chemically crosslinked thermoreversible hydrogels

Xue, Wei; Champ, Simon; Huglin, Malcolm B.

doi:10.1016/s0032-3861(00)00627-3

Cited by 135 publications

(85 citation statements)

References 14 publications

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“…For neutral PVI hydrogels synthesized with several C T and C values and swollen in salt-free water at 20 8C, it was found [19] that w ¼ 0.496 þ 0.308v 2 in very good accordance with the expression deduced by Huglin et al [44] : w ¼ 0.500 þ v 2 /3. Table 2 and 3 show some examples on P mix values calculated with w values proposed in ref.…”

Section: Discussionsupporting

confidence: 81%

pH-dependence of the swelling capacity of poly(N-vinylimidazole) hydrogels

Molina

Gómez-Antón

Piérola

2002

Macromol. Chem. Phys.

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Section: Discussionsupporting

confidence: 81%

pH-dependence of the swelling capacity of poly(N-vinylimidazole) hydrogels

Molina

Gómez-Antón

Piérola

2002

Macromol. Chem. Phys.

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“…[127] Replacing bisacrylamide with more hydrophilic GLY as crosslinker, the swelling of the crosslinked poly(NIPAAm) hydrogel is enhanced. [47,98] Pronounced increase of the polymer-water interaction parameter is also observed with increasing GLY content.…”

Section: Electrolytesmentioning

confidence: 86%

“…It is reported that w % 1=2 þ f=3 for poly(NIPAAm-co-AAc) hydrogel. [47] Taking into account the dependence of polymer-water interaction parameter on polymer concentration w ¼ 0:3875 þ 0:518f ð Þ , reentrant volume transitions of NIPAAm/AMPS hydrogels in aqueous PEG solutions are successfully described. [48] Addition of organic solvent may change the structuring of water around hydrophobic polymers and the hydrogen bonding network.…”

Section: Polymer-solvent Interaction Parameter Wmentioning

confidence: 99%

Modeling Investigation of Hydrogel Volume Transition

Chen

et al. 2004

Macro Theory & Simulations

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Summary: This paper provides an overview of the latest development in modeling and simulation of volume transition behaviors of hydrogels with models at both macroscopic and molecular levels. Energy conservation law, mass conservation law and momentum conservation law provide good starting points for developing models for hydrogel volume transition. Thermodynamic models, transport models, multiphasic mixture theory and molecular simulation are discussed. Thermodynamic models provide qualitative description of equilibrium volume transition of hydrogels. Both transport models and multiphasic mixture theory can predict transient and equilibrium volume transition of hydrogels. Molecular simulation provides mechanistic understanding of hydrogel volume transition. Several key parameters are summarized for future model development.

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“…The most relevant properties of crosslinked polymers (e.g., swelling, elastic modulus, or permeability) depend on the crosslinking density, the type of crosslinker and the polymer network structure. 1,2 Polymer morphology is also known to have an important incidence on the hydrogel properties. [3][4][5][6][7] Crosslinked polymers may show pores with quite different size (from nanometer to millimeter diameters), structure (closed or interconnected) and shape (fibrillar networks, honeycomb-like, spherical, cylindrical, channel-like).…”

Section: Introductionmentioning

confidence: 99%

Discrimination of the roles of crosslinking density and morphology in the swelling behavior of crosslinked polymers: Poly(N‐vinylimidazole) hydrogels

Pacios

Piérola

2009

J of Applied Polymer Sci

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The degree of swelling (S) of crosslinked polymers depends on several variables whose individual contributions are difficult to be distinguished. The aim of this work is to determine the contributions of the morphology to S, discriminating them from the effect of the crosslinking density. Under usual conditions of synthesis, these two characteristics vary simultaneously but here, several samples of chemically crosslinked poly(N-vinylimidazole) having the same permanent crosslinking density (determined by DSC) and different porous morphologies (determined by SEM) were prepared. It was thus found that the variation of S with porosity, keeping constant the rest of variables, is strongly solvent dependent. Swelling in methanol is almost constant whereas for ethanol, deionized water, and aqueous HCl solutions, S depends on morphological features in a different way for each medium. It was concluded that S increases with inherent porosity and solvent effects arise from the counterbalance of such increment with the dependence of the polymer-solvent interaction parameter on the polymer volume fraction.

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Network and swelling parameters of chemically crosslinked thermoreversible hydrogels

Cited by 135 publications

References 14 publications

pH-dependence of the swelling capacity of poly(N-vinylimidazole) hydrogels

pH-dependence of the swelling capacity of poly(N-vinylimidazole) hydrogels

Modeling Investigation of Hydrogel Volume Transition

Discrimination of the roles of crosslinking density and morphology in the swelling behavior of crosslinked polymers: Poly(N‐vinylimidazole) hydrogels

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