DOI QR코드

DOI QR Code

Synthesis and Characterization of Comb-Type Grafted Polymer Hydrogels with Low Temperature Sensitivity

저온 감열 특성을 가지는 Comb-Type Grafted Polymer Hydrogels의 합성 및 특성평가

  • Published : 2003.02.20

Abstract

The comb-type grafted polymer hydrogels, which composed of N-isopropylacrylamide monomer and oligo(N-isopropylacrylamide-co-tert-butylacrylamide) [oligo(NIPAAm-co-t-BAM)], were synthesized by redox polymerization in 5~10% methanol aqueous solution using ammonium peroxodisulfate (APS) at 4 oC for 24h. The lower critical solution temperatures (LCSTs) of the comb-type grafted hydrogels were decreased with increase of t-BAM content in the grafted copolymer. We observed the effect of crosslinker and concentration of oligo(NIPAAm-co-t-BAM) on the shrinking/swelling ratio of hydrogels. Changes of shrinking/swelling ratio were decreased with increase of concentration of crosslinker. The increase of grafted oligo(NIPAAm-co-t-BAM) in the hydrogel shows an fast changes of shrinking/ swelling rate. The comb-type grafted hydrogels are expected to be valuable for the sensing materials of time-temperature labels(TTLs).

Keywords

N-isopropylacrylamide;Hydrogel;LCST;Cold Chain;Swelling

References

  1. Park, T. G.; Hoffman, A. S. J. Appl. Polym. Sci. 1992, 45, 659.
  2. Mamada, A.; Tanaka, T.; Kungwatchku, D.; Irie, M. Macromolecules 1990, 3, 1517.
  3. Tanaka, T.; Nishio, I.; Sung, S. T.; Nishio, S. U. sience 1982, 218, 467. https://doi.org/10.1126/science.218.4571.467
  4. Bae, Y. H.; Okano, T.; Kim, S. W. J. Polym. Sci. Polym. Phys. 1990, 28, 923. https://doi.org/10.1002/polb.1990.090280609
  5. Fail, H.; Bae, Y. H.; Feijen, J.; Kim, S. W. Macromolecules 1993, 26(10), 2496. https://doi.org/10.1021/ma00062a016
  6. Schild, H. G.; Muthukumar, M.; Tirrell, D. A. Macromolecules 1991, 24(4), 948. https://doi.org/10.1021/ma00004a022
  7. Yoshida, R.; Uchida, K.; Kaneko, Y.; Sakai, K.; Kikuchi, A.; Sakurai, Y.; Okano, T. Letters to nature 1995, 374(16), 240. https://doi.org/10.1038/374240a0
  8. Katono, H.; Sanui, K.; Ogata, N.; Olano, T.; Sakurai, Y. J. Polym. 1991, 23, 1179. https://doi.org/10.1295/polymj.23.1179
  9. Yagi, Y.; Inomata, H.; Saito, S. Macromolecules 1992, 25(11), 2997. https://doi.org/10.1021/ma00037a034
  10. Schild, H. D.; Tirrell, D. A. The Journal of Physical Chemistry 1990, 94(10), 4352. https://doi.org/10.1021/j100373a088
  11. Akiyama, S.; Kawashima, K.; Fujishi, H. Polymer 1991, 32(9), 1637.
  12. Aoki, T.; Kawashima, M.; Katono, H.; Sanui, K.; Ogata, N.; Okano, T.; Sakurai, Y. Macromolecules 1994, 27, 947. https://doi.org/10.1021/ma00082a010
  13. Feil, H.; Bae, Y. H.; Feijen, Y.; Kim, S. W. Macromolecules 1992, 25, 5528. https://doi.org/10.1021/ma00046a063