Publication detail

Controlling the internal microstructure and properties of physically cross-linked PVA hydrogels by the rate of freezing

TRUDIČOVÁ, M. ZAHRÁDKA, J. SEDLÁČEK, P. PEKAŘ, M.

Original Title

Controlling the internal microstructure and properties of physically cross-linked PVA hydrogels by the rate of freezing

Type

conference paper

Language

English

Original Abstract

PVA hydrogels can be formed via physical crosslinking (e.g. by cyclic freezing/thawing of aqueous polyvinyl alcohol solutions) or with a chemical cross-linker. Physical crosslinking is more useful for biomedical applications since it contains no harmful cross-linker residues. This work, therefore, focused on studying properties of physically crosslinked hydrogels with different concentrations of polyvinyl alcohol (2.5 to 15 wt%) prepared via cyclic freezing/thawing under different cryogenic conditions: in the liquid nitrogen (-196 degrees C), in two different laboratory freezers (-80 degrees C and -18 degrees C) and the ice bath. Furthermore, the effects of the addition of several cryoprotectants were evaluated. The optical and mechanical properties of the prepared samples were studied, and the microstructure of the hydrogels was observed by scanning electron microscopy after freeze-drying.

Keywords

hydrogel, polyvinyl alcohol, rheology, scanning electron microscopy

Authors

TRUDIČOVÁ, M.; ZAHRÁDKA, J.; SEDLÁČEK, P.; PEKAŘ, M.

Released

1. 1. 2021

Publisher

TANGER Ltd.

Location

Ostrava

ISBN

978-80-87294-98-7

Book

Proceedings 12th International Conference on Nanomaterials - Research & Application

Pages from

547

Pages to

552

Pages count

6

URL

https://www.confer.cz/nanocon/2020/3769-controlling-the-internal-microstructure-and-properties-of-physically-cross-linked-pva-hydrogels-by-the-rate-of-freezing

Full text in the Digital Library

http://hdl.handle.net/11012/202244

BibTex

@inproceedings{BUT172085,
  author="Monika {Trudičová} and Jan {Zahrádka} and Petr {Sedláček} and Miloslav {Pekař}",
  title="Controlling the internal microstructure and properties of physically cross-linked PVA hydrogels by the rate of freezing",
  booktitle="Proceedings 12th International Conference on Nanomaterials - Research & Application",
  year="2021",
  pages="547--552",
  publisher="TANGER Ltd.",
  address="Ostrava",
  doi="10.37904/nanocon.2020.3769",
  isbn="978-80-87294-98-7",
  url="https://www.confer.cz/nanocon/2020/3769-controlling-the-internal-microstructure-and-properties-of-physically-cross-linked-pva-hydrogels-by-the-rate-of-freezing"
}