Journal
REACTIVE & FUNCTIONAL POLYMERS
Volume 112, Issue -, Pages 74-80Publisher
ELSEVIER
DOI: 10.1016/j.reactfunctpolym.2017.01.007
Keywords
Poly(3,4-ethylenedioxythiophene); Conductive composite fiber; Gas sensing; Surface modification; Photoinduced surface grafting
Funding
- Natural Science Foundation of China [51273040, 21274019]
- Program for Changjiang Scholars and Innovative Research Team in University [T2011079, IRT1221]
- National Natural Science Foundation for Distinguished Young Scholar of China [50925312]
- Shanghai Fundamental Research Projects [16JC1400701]
- Program of Introducing Talents of Discipline to Universities in China [111-2-04]
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Conductive composite fibers were successfully fabricated by coating poly(3,4-ethylenedioxythiophene) (PEDOT) layers on the surface of polypropylene-graft-poly(acrylic acid) (PP-g-PM) fibers through in situ chemical oxidative polymerization. It was found that the adhesion between the conductive PEDOT layers and the modified PP fiber substrates was significantly enhanced due to the electrostatic attractions between PEDOT chains and carboxylic groups of grafted PM. In this study, we investigated the influence of the 3,4-ethylenedioxythiophene (EDOT) concentration and the oxidant species on the electrical conductivity of the composite fibers, and the result show that the maximum conductivities of PP-g-PAA/PEDOT composite fibers prepared with FeCl3 and iron(III) p-toluenesulfonate (FepTS) as oxidants reached 0.069 S/cm and 10.09 S/cm, respectively. The composite fibers were applied as a sensor for HCl and NH3 gas detection and exhibited a rapid and reversible response. The influence of the oxidant species on the sensing properties for HCI and NH3 gas detection is further discussed, and some features such as fast response time (less than 2 s) and high relative resistance changes (63% for HCl and 110% for NH3 gas) were achieved. (C) 2017 Elsevier B.V. All rights reserved.
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