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Pore structure of macroporous monolithic cryogels prepared from poly(vinyl alcohol)

Plieva, Fatima LU ; Sjöö, Malin LU ; Aguilar, MR ; Gomez, D ; Mikhalovsky, S ; Galaev, Igor LU and Mattiasson, Bo LU (2006) In Journal of Applied Polymer Science 100(2). p.1057-1066
Abstract
Macroporous monolithic cryogels made from poly(vinyl alcohol) (PVA) with degree of saponification 87.7% have been prepared using a crosslinking reaction with glutaralclehyde under acidic conditions at subzero ternperatures. The porous structure of the monolithic cryogels from PVA (cryoPVA), analyzed using optical microscopy, scarinina electron microscopy, and environmental scanning electron microscopy, revealed interconnected macropores up to 150 mu m in size with a noticeable microporosity of the gel walls. Differential scanning calorimetry measurement showed that more than 90% of the water in the cryoPVA monoliths was freezable water, while the amount of polymer bound water increased with increase in the polymer concentration in the... (More)
Macroporous monolithic cryogels made from poly(vinyl alcohol) (PVA) with degree of saponification 87.7% have been prepared using a crosslinking reaction with glutaralclehyde under acidic conditions at subzero ternperatures. The porous structure of the monolithic cryogels from PVA (cryoPVA), analyzed using optical microscopy, scarinina electron microscopy, and environmental scanning electron microscopy, revealed interconnected macropores up to 150 mu m in size with a noticeable microporosity of the gel walls. Differential scanning calorimetry measurement showed that more than 90% of the water in the cryoPVA monoliths was freezable water, while the amount of polymer bound water increased with increase in the polymer concentration in the cryoPVA sample. The swelling degree of cryoPVA depended on concentration of polymer in the initial reaction mixture and degree of crosslinking. The cryoPVA monoliths were elastic and spongy-like materials that can be dried, stored in dried state, and re-swelled when required. Derivatization of hydroxyl-groups of the cryoPVA monolith allowed incorporation of required functionality. (c) 2006 Wiley Periodicals, Inc. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
pore structure, freezable water, crosslinking, cryogel, degree of saponification, monolith, poly(vinyl alcohol)
in
Journal of Applied Polymer Science
volume
100
issue
2
pages
1057 - 1066
publisher
John Wiley and Sons
external identifiers
  • wos:000235556400026
  • scopus:33645137226
ISSN
1097-4628
DOI
10.1002/app.23200
language
English
LU publication?
yes
id
068aab7d-63ef-4808-a4be-9e5deb872e29 (old id 417139)
date added to LUP
2016-04-01 12:28:39
date last changed
2021-06-16 04:08:35
@article{068aab7d-63ef-4808-a4be-9e5deb872e29,
  abstract     = {Macroporous monolithic cryogels made from poly(vinyl alcohol) (PVA) with degree of saponification 87.7% have been prepared using a crosslinking reaction with glutaralclehyde under acidic conditions at subzero ternperatures. The porous structure of the monolithic cryogels from PVA (cryoPVA), analyzed using optical microscopy, scarinina electron microscopy, and environmental scanning electron microscopy, revealed interconnected macropores up to 150 mu m in size with a noticeable microporosity of the gel walls. Differential scanning calorimetry measurement showed that more than 90% of the water in the cryoPVA monoliths was freezable water, while the amount of polymer bound water increased with increase in the polymer concentration in the cryoPVA sample. The swelling degree of cryoPVA depended on concentration of polymer in the initial reaction mixture and degree of crosslinking. The cryoPVA monoliths were elastic and spongy-like materials that can be dried, stored in dried state, and re-swelled when required. Derivatization of hydroxyl-groups of the cryoPVA monolith allowed incorporation of required functionality. (c) 2006 Wiley Periodicals, Inc.},
  author       = {Plieva, Fatima and Sjöö, Malin and Aguilar, MR and Gomez, D and Mikhalovsky, S and Galaev, Igor and Mattiasson, Bo},
  issn         = {1097-4628},
  language     = {eng},
  number       = {2},
  pages        = {1057--1066},
  publisher    = {John Wiley and Sons},
  series       = {Journal of Applied Polymer Science},
  title        = {Pore structure of macroporous monolithic cryogels prepared from poly(vinyl alcohol)},
  url          = {http://dx.doi.org/10.1002/app.23200},
  doi          = {10.1002/app.23200},
  volume       = {100},
  year         = {2006},
}