Electrical conductivity response of poly(phenylene-vinylene)/zeolite composites exposed to ammonium nitrate.
Poly(p-phenylenevinylene) (PPV) was chemically synthesized via the polymerization of p-xylene-bis(tetrahydrothiophenium chloride) monomer and doped with H(2)SO(4). To improve the electrical conductivity sensitivity of the conductive polymer, Zeolites Y (Si/Al = 5.1, 30, 60, 80) were added into the conductive polymer matrix. All composite samples show definite positive responses towards NH(4)NO(3). The electrical conductivity sensitivities of the composite sensors increase linearly with increasing Si/Al ratio: with values of 0.201, 1.37, 2.80 and 3.18, respectively. The interactions between NH(4)NO(3) molecules and the PPV/zeolite composites with respect to the electrical conductivity sensitivity were investigated through the infrared spectroscopy.
Center of Excellence in Petroleum Petrochemicals and Advanced Materials, The Petroleum and Petrochemical College, Chulalongkorn University, Soi Chula 12, Phayathai Road, Phatumwan, Bangkok, 10330, Thailand. som_news@hotmail.com
Jirarat
J
Kamonsawas
Anuvat
A
Sirivat
Sumonman
S
Niamlang
Pimpa
P
Hormnirun
Walaiporn
W
Prissanaroon-Ouajai
D015374:Biosensing Techniques / Q000295:instrumentation; D004553:Electric Conductivity; D008855:Microscopy, Electron, Scanning; D008954:Models, Biological; D009566:Nitrates / Q000494:pharmacology*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D011145:Polyvinyls / Q000737:chemistry*; D016062:Porosity; D013055:Spectrophotometry, Infrared; D013499:Surface Properties; D017641:Zeolites / Q000138:chemical synthesis / Q000737:chemistry*
D009566:Nitrates; D011108:Polymers; D011145:Polyvinyls; C470024:poly(4-phenylenevinylene); D017641:Zeolites; C006568:ammonium nitrate