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Sensors 2003, 3(4), 83-90; doi:10.3390/s30400083
Article

Influence of Methacrylic-Acrylic Copolymer Composition on Plasticiser-free Optode Films for pH Sensors

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Received: 7 March 2003; Accepted: 24 March 2003 / Published: 27 March 2003
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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.
Keywords: Optical pH sensor; Methacrylic-acrylic films; Chromoionophore; Plasticiserfree Optical pH sensor; Methacrylic-acrylic films; Chromoionophore; Plasticiserfree
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Heng, L.Y.; Fang, T.H.; Chern, L.H.; Ahmad, M. Influence of Methacrylic-Acrylic Copolymer Composition on Plasticiser-free Optode Films for pH Sensors. Sensors 2003, 3, 83-90.

AMA Style

Heng LY, Fang TH, Chern LH, Ahmad M. Influence of Methacrylic-Acrylic Copolymer Composition on Plasticiser-free Optode Films for pH Sensors. Sensors. 2003; 3(4):83-90.

Chicago/Turabian Style

Heng, Lee Y.; Fang, Teh H.; Chern, Loh H.; Ahmad, Musa. 2003. "Influence of Methacrylic-Acrylic Copolymer Composition on Plasticiser-free Optode Films for pH Sensors." Sensors 3, no. 4: 83-90.


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