A Sensor for Acid Concentration Based on Cellulose Paper Sheets Modified with Polyaniline Nanoparticles

作者：Souza Fernando G Jr; Oliveira Geiza E; Anzai Thiago; Richa Priscila; Cosme Taina; Nele Marcio; Rodrigues Cezar H M; Soares Bluma G; Pinto Jose Carlos^*

来源：Macromolecular Materials and Engineering, 2009, 294(11): 739-748.

DOI：10.1002/mame.200900111

• cellulose
• FT-IR
• paper
• polyaniline
• sensors

Sheets of cellulosic paper were modified with PAni nanoparticles through a chromatographic process. When exposed to acidic conditions, strips of the modified paper sheets are subject to RGB color changes that can be detected by a scanner (and similar devices used for image analyses). As a consequence, cellulosic paper sheets modified with PAni can be used for analyses of acid concentrations in liquid and gaseous streams. Aqueous solutions of hydrochloric acid were used for modeling purposes and it was observed that color changes were most significant when the HCl content was between 0-500 ppm range. Materials were characterized by FT-IR spectroscopy, optical microscopy, AFM, and SAXS techniques, in order to reveal the main characteristics of the produced materials.

• 出版日期2009-11-12