Water-absorbing properties of hydrogels based on polymeric complexes

Vashuk, E. V.; Vorobievа, E. V.; Basalyga, I. I.; Крутько, Н. П.

doi:10.1007/s100190000115

Cited by 14 publications

(7 citation statements)

References 4 publications

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“…The volume transition ability of poly(AAm-sodium acrylate-PVA) hydrogel increases to 1 200 g water per 1 g swollen polymeric complex after heat treatment at 120 8C. [106] The increased porosity of the polymeric complex results in a decrease in elastic modulus and thus an increase in the volume transition. Schmidt et al reported that PVME structures formed by radiation crosslinking of PVME in aqueous solutions can be microgel particles, porous hydrogel, branched molecules and homogeneous hydrogel, influenced by preparation parameters including radiation dose and irradiation temperature.…”

Section: Preparation Historymentioning

confidence: 99%

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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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Section: Preparation Historymentioning

confidence: 99%

“…Addition of metal ions is reported to decrease the hydrogel swelling. [10,106] Heavy metal adsorption by hydrogels leads to more physical crosslinking formed by the inter-chain metal complex formation. [105] However, the metal adsorption capacity decreases with increasing crosslinker density due to the more rigid polymer networks.…”

Section: Metal Ionsmentioning

confidence: 99%

Modeling Investigation of Hydrogel Volume Transition

Chen

et al. 2004

Macro Theory & Simulations

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“…Uptake of water was measured according to previous reports . The swelling of hydrogels was monitored over time.…”

Section: Experimental Sectionmentioning

confidence: 99%

“…Uptake of water was measured according to previous reports. 47 The swelling of hydrogels was monitored over time. Weight gain of hydrogel samples were measured as a function of time in deionized water.…”

Section: ■ Introductionmentioning

confidence: 99%

Photopatternable “Clickable” Hydrogels: “Orthogonal” Control over Fabrication and Functionalization

et al. 2015

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Clickable" hydrogels were fabricated using dendron− polymer conjugate based triblock copolymers containing orthogonally functionalizable dendrons. Because of their well-defined chemical composition, the dendron-based hydrogels provide control over the number of reactive groups in the hydrogel so that the desired (bio)molecules can be immobilized with tailored density within the hydrogel matrix. Well-defined hydrogel precursors were obtained using the copper-catalyzed azide−alkyne "click" cycloaddition between second and third polyester dendrons bearing an alkyne group at their focal point and linear poly(ethylene glycol) (PEG) diazides PEG2kDa, PEG4kDa, and PEG6kDa. The surfaces of the outer dendron-based blocks were decorated with methacrylate and alkyne groups, the former necessary for photo-cross-linking, while the latter "clickable" alkyne groups would enable efficient postfunctionalization of hydrogels. The degree of cross-linking and the amount of reactive alkyne units available for postgelation functionalization of the hydrogels were tuned by adjusting the stoichiometry of the orthogonally reactive groups on the dendrons. Hydrogels containing alkyne groups were synthesized via photopolymerization with gelation efficiencies between 91 and 99%. Water uptake of these hydrogels in aqueous media could be tuned between 500 and 3010% by varying the length of PEG as well as generation and substitution of the dendrons. Successful covalent modification of these hydrogels via the azide−alkyne "click" reaction was demonstrated by attachment of the fluorescent dye bodipy and immobilization of the protein streptavidin onto biotinylated hydrogels. Importantly, it was demonstrated that the amount of protein immobilization can be tuned varying the amount of ligand incorporated in the hydrogel using the "clickable" alkyne-based reactive handles. Three-dimensional hydrogel micropatterns on silicon oxide surfaces were fabricated using either micromolding in capillaries or via photo-cross-linking using a photomask. These reactive micropatterns were amenable to efficient functionalization in a tailored manner by using the Huisgen-type "click" cycloaddition reaction.

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“…Physical property analysis (water uptake) was done according to the previously reported methods. 112 The swelling behavior of the hydrogels was characterized as a function of time. The experiments were carried out by measuring the weight gain as a function of immersion time in 10 mL of deionized water.…”

Section: Functionalization Of the Dendronized Polymers Synthesis Of C...mentioning

confidence: 99%

Fabrication of “Clickable” Hydrogels via Dendron−Polymer Conjugates

2010

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Functionalizable hydrogels are of great interest as three-dimensional (3D) scaffolds for cell growth and tissue engineering. The ability to covalently immobilize biologically relevant molecules with accurate control of their density within the hydrogel matrix is highly desirable. Dendron−polymer conjugates prepared via Huisgen type “click” reaction provides a unique precursor for reactive hydrogels. A family of dendron−polymer conjugates were prepared by coupling second- and third-generation alkyne appended polyester dendrons with linear poly(ethylene glycol) diazides, PEG2K and PEG6K. Controlled cross-linking of alkyne-functionalized dendron−polymer−dendron conjugates with a hydrophilic diazide provides hydrogels with gelation efficiencies greater than 80%. Excess leftover alkynes can be used to functionalize these hydrogels as desired. Fine tuning of degree of cross-linking and functionalization is demonstrated by immobilization of streptavidin.

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Water-absorbing properties of hydrogels based on polymeric complexes

Cited by 14 publications

References 4 publications

Modeling Investigation of Hydrogel Volume Transition

Modeling Investigation of Hydrogel Volume Transition

Photopatternable “Clickable” Hydrogels: “Orthogonal” Control over Fabrication and Functionalization

Fabrication of “Clickable” Hydrogels via Dendron−Polymer Conjugates

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