Article

Microporous, Thermosensitive Organic-Inorganic Hybrid Hydrogel Prepared by Freezing

  1. Norihiro Kato*

Article first published online: 11 JUL 2008

DOI: 10.1002/masy.200850705

Issue

Macromolecular Symposia

Macromolecular Symposia

Special Issue: Nanostructured Polymers and Polymer Nanocomposites

Volume 267, Issue 1, pages 27–30, June 2008

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How to Cite

Kato, N. (2008), Microporous, Thermosensitive Organic-Inorganic Hybrid Hydrogel Prepared by Freezing. Macromol. Symp., 267: 27–30. doi: 10.1002/masy.200850705

Author Information

  1. Department of Applied Chemistry, Faculty of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan Fax: (+81) 28 689 6154;

*Department of Applied Chemistry, Faculty of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan Fax: (+81) 28 689 6154;.

Publication History

  1. Issue published online: 11 JUL 2008
  2. Article first published online: 11 JUL 2008

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Keywords:

  • hydrogel;
  • microporous polymers;
  • N-isopropylacrylamide;
  • organic-inorganic composite;
  • stimuli-sensitive polymers

Abstract

Thermally triggered shrinking rates of poly(N-isopropyl-acrylamide) (PNIPA) -based organic-inorganic hydrogel could be accelerated by applying the ice templating method. Freezing and subsequent rehydration of gels is an effective way to prepare the porous polymer network that leads to rapid expelling of pore water. The shrinking coefficients obtained by fitting Fick's law to the data increased two orders of magnitude as compared with the conventional gel before freezing. The microstructure of gels generated during freezing gels had advantage to expel the pore water rapidly probably due to the PNIPA aggregation through the hydrophobic interaction.

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