Premium
A novel resistive‐type humidity sensor based on poly( p ‐diethynylbenzene)
Author(s) -
Yang Mujie,
Li Yang,
Zhan Xiaowei,
Ling Mingfang
Publication year - 1999
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19991121)74:8<2010::aid-app16>3.0.co;2-1
Subject(s) - relative humidity , humidity , toluene , materials science , solvent , polymer chemistry , resistive touchscreen , chemistry , analytical chemistry (journal) , organic chemistry , physics , thermodynamics , electrical engineering , engineering
Poly( p ‐diethynylbenzene) (PDEB) synthesized with nickel catalyst Ni(CC○CCH) 2 (PPh 3 ) 2 (NiC) in dioxane–toluene mixed‐solvent system at 25°C shows a rich trans structure with pendant‐group (○CCH) content of about 35% having higher molecular weight and good solubility. A novel resistive‐type humidity sensor based on PDEB is presented. Its humi‐sensing characteristics are described and discussed. The impedance of the sensor changed from ∼ 10 3 –10 7 Ω in almost the whole humidity range [∼ 15–92% relative humidity (RH)], which is low compared with sensors based on other humi‐sensitive conjugate polymers, and hysteresis of no more than 3% RH was observed. The sensor prepared by Langmuir–Blodgett (LB) deposition method shows the best humidity response. An explanation of humi‐sensing behavior of PDEB is attempted by taking into account the interaction between hydrogen protons and super π‐conjugate orbits in PDEB. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 2010–2015, 1999