Composites of carbon black functionalized with polymers as candidates for the detection of methanol vapor
| Autor: | Yousi Chen, Yang Li, Huicai Wang, Wa Yuan, Mingyong Yuan, Mujie Yang |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
chemistry.chemical_classification
Thermogravimetric analysis Polymers and Plastics General Chemical Engineering Infrared spectroscopy General Chemistry Polymer Carbon black Biochemistry Styrene chemistry.chemical_compound chemistry Materials Chemistry Copolymer Environmental Chemistry Thermal stability Thin film Composite material |
| Zdroj: | Reactive and Functional Polymers. 67:977-985 |
| ISSN: | 1381-5148 |
| DOI: | 10.1016/j.reactfunctpolym.2007.05.021 |
| Popis: | Homo- and copolymers of styrene and 4-vinylpyridine prepared by a nitroxide-mediated “living” free-radical method were grafted onto carbon black (CB) by trapping of radicals formed by the dissociation of the radical-capped polymers. The structural characteristics of the polymers and the composites were investigated by using Fourier transformed infrared spectra, nuclear magnetic resonance spectra, thermal gravimetric analysis, scanning electron microscopy and gel permeation chromotography. The composites were dip-coated on interdigitated electrodes to prepare thin film gas sensors, and their electrical responses towards methanol vapor were investigated at room temperature. It was found that the composites exhibited linear and reversible electrical responses towards methanol vapor in the range of 1000–20,000 ppm ( R 2 = 0.999), and the sensitivities are highly dependent on the structure of the polymers, the content of CB and the dispersion of CB in the composites. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect