Chemically modified teflon as an effective humidity sensor

Dake, Sujata B. ; Bhoraskar, S. V. ; Patil, Prakash A. ; Narasimhan, N. S. (1986) Chemically modified teflon as an effective humidity sensor Polymer, 27 (6). pp. 910-912. ISSN 0032-3861

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Humidity-sensing characteristics of TeflonĀ® (PTFE) after etching its surface with sodium-naphthalene complex are reported. The change in impedance with relative humidity of the treated films is studied in various extremely dry gaseous atmospheres, viz. Ar, N2, H2 and O2 and also in the presence of moist air. It was observed that the electrical conduction of the films increases by four orders of magnitude as the relative humidity varied from 20% to 80%. The results were analysed using X-ray photoelectron spectroscopy and infra-red techniques. Possible models of the reaction and the chemical behaviour of the sample in humid conditions are discussed.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Humidity Sensors; PTFE; Teflon
ID Code:24164
Deposited On:29 Nov 2010 10:18
Last Modified:09 Jun 2011 09:54

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