Electrical Behaviour of Chitosan-Silver Nanocomposite in Presence of Water Vapour

Journal of Water and Environmental Nanotechnology

ARTICLE

Yadav, Bal¹  Kumar, Ritesh²  Kumar, Ravindra¹  Chaudhuri, Subhasis³  Pramanik, Panchanan³ 

[1] Department of Applied Physics, School of Physical Sciences, Babasaheb Bhimrao Ambedkar University;Department of Physics, University of Lucknow;Department of Chemistry

关键词: Chitosan;    Humidity sensor;    Nanocomposite;    Silver nanoparticles;   

DOI  :  10.22090/jwent.2017.02.001

学科分类：数学（综合）

来源: Iranian Environmental Mutagen Society

【 摘 要 】

This paper presents the synthesis, characterization of the nanocomposite of silver and chitosan polymer composite reinforced by cellulose fibre and its electrical behaviour in presence of water vapour. The coated paper has been characterized by XRD, IR, SEM and EDX techniques. The size of silver nanoparticles is found to be around 9 nm and deposited uniformly. Chitosan, as well as cellulose, contain a hydrogen attached to electronegative nitrogen and oxygen. This gives a favourable environment for the formation of hydrogen bonds. IR peaks of the composite infer the intermolecular hydrogen bonding between the two constituents. The SEM pictures show that the coating of the fibres with nanoparticles is quite uniform. EDX analysis shows that the coated filter paper has sufficient amount of silver along with carbon and oxygen. The coated paper shows good sensitivity towards humidity. It gives excellent linearity in response with a concentration of water vapour after heat treatment of composite at 130 °C. The sensitivity of the sensor is 0.8 MΩ per unit of relative humidity. Sensing properties originate from protonic conductivity from adsorbed water molecule.

【 授权许可】

CC BY