Influence of methacrylic-acrylic copolymer composition on plasticiser-free optode films for pH sensors

Yook Heng Lee, Teh Huey Fang, Loh Han Chern, Musa Ahmad

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

In this work we have examined the use of plasticiser-free polymeric films incorporating a proton selective chromoionophore for optical pH sensor. Four types of methacrylic-acrylic copolymers containing different compositions of n-butyl acrylate (nBA) and methyl methacrylate (MMA) were synthesised for use as optical sensor films. The copolymers were mixed with appropriate amounts of chromoionophore (ETH5294) and a lipophilic salt before spin coated on glass slides to form films for the evaluation of pH response using spectrophotometry. Co-polymer films with high nBA content gave good response and the response time depended on the film thickness. A preliminary evaluation of the optical films of high nBA content with pHs from 2 - 14 showed distinguishable responses from pH 5 - 9. However, the adhesion of the pH sensitive film was good for copolymers with higher content of MMA but not for films with high nBA.

Original languageEnglish
Pages (from-to)83-90
Number of pages8
JournalSensors
Volume3
Issue number4
Publication statusPublished - 2003

Fingerprint

pH sensors
Plasticizers
plasticizers
Acrylics
copolymers
Copolymers
acrylates
Methacrylates
sensors
Optical sensors
Chemical analysis
Polymer films
Optical films
Spectrophotometry
Motion Pictures
Reaction Time
Glass
Film thickness
Protons
Polymers

Keywords

  • Chromoionophore
  • Methacrylic-acrylic films
  • Optical pH sensor
  • Plasticiser-free

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry

Cite this

Influence of methacrylic-acrylic copolymer composition on plasticiser-free optode films for pH sensors. / Lee, Yook Heng; Fang, Teh Huey; Chern, Loh Han; Ahmad, Musa.

In: Sensors, Vol. 3, No. 4, 2003, p. 83-90.

Research output: Contribution to journalArticle

Lee, Yook Heng ; Fang, Teh Huey ; Chern, Loh Han ; Ahmad, Musa. / Influence of methacrylic-acrylic copolymer composition on plasticiser-free optode films for pH sensors. In: Sensors. 2003 ; Vol. 3, No. 4. pp. 83-90.
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