Please use this identifier to cite or link to this item: http://nopr.niscpr.res.in/handle/123456789/15814
Title: Synthesis of polyaniline grafted cellulose suitable for humidity sensing
Authors: Shukla, S K
Keywords: Copolymer;PANi-cellulose;Electrical resistance;Chemical characterization;Humidity sensing
Issue Date: Dec-2012
Publisher: NISCAIR-CSIR, India
Abstract: Polyaniline-grafted-cellulose (PANi-cellulose) copolymer is prepared by a chemical method using cupric sulphate as initiator. The representative PANi-cellulose samples are characterized by Fourier transform infrared spectroscopy (FTIR), thermal gravimetric differential thermal analysis (TG-DTA), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The data reveal the formation of electrically conducting and hydrophillc copolymer. The film of PANi-cellulose is casted on a glass slide by spin coating technique and used for humidity sensing of a controlled humid environment by monitoring electrical resistance. The resistance continuously decreased from ~ 32 MΩ to 10.0 MΩ with increase in relative humidity in the range of 5- 90%. The observed sensing parameters are sensitivity 0.22, response time 40 s, recover time 60 s and stability for more than 60 days.
Page(s): 417-420
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.19(6) [December 2012]

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