2010
DOI: 10.1002/polb.22076
|View full text |Cite
|
Sign up to set email alerts
|

Swelling behavior of chemically crosslinked PVA gels in mixed solvents

Abstract: We report the swelling behavior of chemically crosslinked polyvinyl alcohol (PVA) gels with different degrees of hydrolysis in water, several organic solvents, and their mixed solvents. The gels were dried after gelation and were put into their respective solvents. The gel volume in pure water decreased with increasing temperatures, and the total changes increased with decreasing degrees of hydrolysis. The swelling ratio depends on the solvent and its concentration. In the cases of mixed solvents of methanol–w… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1
1
1

Citation Types

1
32
0

Year Published

2010
2010
2023
2023

Publication Types

Select...
10

Relationship

1
9

Authors

Journals

citations
Cited by 47 publications
(33 citation statements)
references
References 32 publications
1
32
0
Order By: Relevance
“…As a rule, multifunctional moieties capable of reacting with the PVA hydroxyl groups can be used as crosslinking agents for obtaining 3D PVA networks [13]. Although PVA can be easily cross-linked by contact with glutaraldehyde in acidic medium [14] such process presents limitations due to non-uniformity of the obtained matrix and to the severe toxicity of glutaraldehyde. PVA can also be physically crosslinked by repeated freezing-thawing cycles in aqueous solution, creating crystalline clusters that actuate as reticules [15,16].…”
mentioning
confidence: 99%
“…As a rule, multifunctional moieties capable of reacting with the PVA hydroxyl groups can be used as crosslinking agents for obtaining 3D PVA networks [13]. Although PVA can be easily cross-linked by contact with glutaraldehyde in acidic medium [14] such process presents limitations due to non-uniformity of the obtained matrix and to the severe toxicity of glutaraldehyde. PVA can also be physically crosslinked by repeated freezing-thawing cycles in aqueous solution, creating crystalline clusters that actuate as reticules [15,16].…”
mentioning
confidence: 99%
“…In case of FTIR spectra of PVA, a broad band at 3430.9 cm −1 due to -O-H stretching vibrations, a band at 1264 cm −1 due to the O-H bending vibration and at 2854 cm −1 are attributed to the stretching vibration of -CH 2 . The band at 1461.1 cm −1 due to C-H bending vibration has been observed [44]. In case of crosslinked polymer matrix a broad band with less absorbance as compared to both sterculia gum and PVA matrices has been observed at 3423.4 cm −1 which is due to the presence of hydroxyl groups.…”
Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning
confidence: 92%
“…On the other hand, the charge repulsion between GO and CR is weakened because the negatively charged surfaces of GO aerogels are covered by PVA chains, which makes it easier for CR molecules to be adsorbed on the aerogel. Meanwhile, PVA chains adhered on the GO layers can also adsorb some CR particles through the hydrogen bonding interaction between S-containing groups of CR and C\ \OH groups on PVA chains, which can be demonstrated by the disappearance of the absorption peak at 1123 cm −1 (S_O stretching vibration) [49,51] for CR and peaks at 1256 cm −1 and 1050 cm −1 (C\ \OH stretching vibration) for PVA [52,53]. To further confirm the results, the surface morphology of the 0.5GO/0.2PVA aerogel after adsorption was characterized using SEM.…”
Section: Absorption Performance For Organic Dyesmentioning
confidence: 96%