A novel fluorescence temperature sensor based on a surfactant-free PVA/borax/2-naphthol hydrogel network system

Sang Min Lee, Woo Young Chung, Jong Kyu Kim, Dong Hack Suh

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

This article is a report about the novel fluorescence temperature sensor based on a surfactant-free Poly (vinly alcohol)/borax/2-naphthol hydrogel system. The well-known fluorescence indicator, 2-naphthol, exhibits a change of fluorescence intensity when it is embedded in aqueous PVA/borax gel networks at various temperatures. The blue color emission intensity(PL: λmix = 426 nm) of 2-naphthol in a basic hydrogel changed gradually to strong from 30°C to 80°C when excitation wavelength was 365 nm. The pH change in the hydrogel system was in the range from 8.50 at 30°C to 9.35 at 80°C with rising temperature. In the case of salicylic acid, the blue color emission intensity in the acidic gel decreases with rising temperature when excitation wavelength was 365 nm in all cases. The pH change in the hydrogel system was from 2.80 at 30°C to 2.40 at 80°C with rising temperature.

Original languageEnglish
Pages (from-to)2114-2118
Number of pages5
JournalJournal of Applied Polymer Science
Volume93
Issue number5
DOIs
StatePublished - 2004 Sep 5

Keywords

  • Crosslinking
  • Fluorescence indicator
  • Fluorescence temperature sensor
  • Hydrogels

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