De-acetylated PVA for Pharmaceutical Hydrogel Applications

Edgren, David; Zhu, Peter C.; Struble, Elaine; Frame, Richard J.; Zhang, Yun

doi:10.1080/10601321003742204

Cited by 8 publications

(6 citation statements)

References 10 publications

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“…Finally, the skeletal signals appeared as a medium intensity bands in the region from 850 to 916 cm −1 . Two peaks of low intensity appeared between 1600 and 1750 cm −1 and were assigned to CO and CO stretching from the residual acetyl content (2%) present in the PVA matrix . In the case of PVA loaded with CNC [Figure (c)], the same characteristics peaks corresponding to PVA were observed.…”

Section: Resultsmentioning

confidence: 75%

Crosslinked PVA nanofibers reinforced with cellulose nanocrystals: Water interactions and thermomechanical properties

Peresin

Vesterinen

Habibi

et al. 2014

J of Applied Polymer Sci

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Acid-catalyzed vapor phase esterification with maleic anhydride was used to improve the integrity and thermo-mechanical properties of fiber webs based on poly(vinyl alcohol), PVA. The fibers were produced by electrospinning PVA from aqueous dispersions containing cellulose nanocrystals (CNCs). The effect of esterification and CNC loading on the structure and solvent resistance of the electrospun fibers was investigated. Chemical characterization of the fibers (FTIR, NMR) indicated the formation of ester bonds between hydroxyl groups belonging to neighboring molecules. Thermomechanical properties after chemical modification were analyzed using thermal gravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis. An 80% improvement in the ultimate strength was achieved for CNC-loaded, crosslinked PVA fiber webs measured at 90% air relative humidity. Besides the ultra-high surface area, the composite PVA fiber webs were water resistant and presented excellent mechanical properties.

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Section: Resultsmentioning

confidence: 75%

Crosslinked PVA nanofibers reinforced with cellulose nanocrystals: Water interactions and thermomechanical properties

Peresin

Vesterinen

Habibi

et al. 2014

J of Applied Polymer Sci

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“…1c. In the case of P100w, the infrared spectrum displayed typical PVA absorption bands such as AOH stretching at 3275 cm À1 , asymmetric and symmetric CH 2 stretching at 2936 and 2916 cm À1 , respectively, CAH stretching at 2854 cm À1 , C@O stretching of residual acetate groups at 1680 cm À1 , CH 2 bending at 1420 cm À1 and CAO stretching at 1088 cm À1 [42,43]. For P100 sample absorption bands due to TFA were also found.…”

Section: Plasticizer Effect Of Tfa On Pva Polymermentioning

confidence: 86%

Effect of trifluoroacetic acid on the properties of polyvinyl alcohol and polyvinyl alcohol–cellulose composites

Guzmán-Puyol

Ceseracciu

Heredia‐Guerrero

et al. 2015

Chemical Engineering Journal

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“…Poly (vinyl alcohol) (PVA) is a kind of biocompatible and biodegradable polymers with three kinds of tacticities: syndiotacticity, isotacticity, and heterotacticity. It has been widely used to prepare functional hydrogels for pharmaceutical applications . Especially, PVA hydrogel can be prepared by the common freezing/thawing cycle without the use of traditional chemical crosslinking techniques that are widely used in other hydrogel preparation, because physical crosslinking can be formed in concentrated PVA solution via numerous crystalline areas.…”

Section: Introductionmentioning

confidence: 99%

Functionalization of polyvinyl alcohol hydrogels with graphene oxide for potential dye removal

She

et al. 2013

J of Applied Polymer Sci

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Because of highly frozen macromolecule chains, polyvinyl alcohol (PVA) hydrogels have never been used for dye removal. This work focuses on improving the adsorption capacity of the PVA hydrogel by using amphiphilic graphene oxide to improve its macromolecular chain mobility in crystal domain and introduce new functional groups. To evaluate its effectiveness, crystal structure, swelling kinetics, and model dye methylene blue (MB) adsorption of the as-prepared PVA hybrid hydrogels were systematically investigated. The results indicate that the hybrid PVA hydrogels have lower crystallinity and less crystal stability, demonstrating the improved macromolecular chain mobility. Moreover, improved swelling ratios of PVA/GO hydrogels also illustrate the enhanced macromolecular chain mobility. MB adsorption experiment indicates that GO introduced can result in great improvement in MB adsorption. And the adsorption process follows the second-order kinetic model and Morris-Weber model, which is determined by the intraparticle diffusion. Furthermore, MB adsorption isotherm follows Freundlich model and the adsorption is heterogeneous. Desorption studies indicate that the interaction between PVA hydrogels and MB consists of both physisorption and chemisorption.

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De-acetylated PVA for Pharmaceutical Hydrogel Applications

Cited by 8 publications

References 10 publications

Crosslinked PVA nanofibers reinforced with cellulose nanocrystals: Water interactions and thermomechanical properties

Crosslinked PVA nanofibers reinforced with cellulose nanocrystals: Water interactions and thermomechanical properties

Effect of trifluoroacetic acid on the properties of polyvinyl alcohol and polyvinyl alcohol–cellulose composites

Functionalization of polyvinyl alcohol hydrogels with graphene oxide for potential dye removal

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