Premium
A novel fluorescence temperature sensor based on a surfactant‐free PVA/borax/2‐naphthol hydrogel network system
Author(s) -
Lee Sang Min,
Chung Woo Young,
Kim Jong Kyu,
Suh Dong Hack
Publication year - 2004
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.20688
Subject(s) - borax , fluorescence , aqueous solution , pulmonary surfactant , materials science , absorption (acoustics) , atmospheric temperature range , analytical chemistry (journal) , chemical engineering , chemistry , composite material , chromatography , optics , organic chemistry , raw material , physics , meteorology , engineering
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:λ max = 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. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 2114–2118, 2004