Preparation of a polyacrylonitrile/multi-walled carbon nanotubes composite by surface-initiated atom transfer radical polymerization on a stainless steel wire for solid-phase microextraction

• Tipo: Artigo em Revista Científica Internacional
• Data: 2010

Autores

Minet, I (Autor) Outra; Hevesi, L (Autor) Outra; Manuel Azenha (Autor) FCUP; Delhalle, J (Autor) Outra; Mekhalif, Z (Autor) Outra

Revista

Título: Journal of Chromatography A

Vol. 1217 Nº 43

Páginas: 2758-2767

ISSN: 0021-9673

Editora: Elsevier

Indexação

ISI Web of Knowledge - 53 Citações

Scopus - 58 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

CORDIS: Ciências Físicas > Química > Química orgânica > Química de polímeros ; Ciências Físicas > Química > Química analítica ; Ciências Físicas > Química > Química física > Química das superfícies

Outras Informações

ID Authenticus: P-003-7DZ

DOI: 10.1016/j.chroma.2010.02.030

Abstract (EN): We report on the fabrication and performances of a solid-phase microextraction (SPME) fiber based on a stainless steel wire coated with a covalently attached polyacrylonitrile (PAN)/multi-walled carbon nanotubes (MWCNTs) composite. This new coating is obtained by atom transfer radical polymerization (ATRP) of acrylonitrile mixed with MWCNTs. ATRP is initiated from 11-(2-bromo-2-methylpropionyloxy)-undecyl-phosphonic acid molecules grafted on the wire surface via the phosphonic acid group. The extraction performances of the fibers are assessed on different classes of compounds (polar, non-polar, aromatic, etc.) from water solutions by headspace extraction. The optimization of the parameters affecting the extraction efficiency of the target compounds was studied as well as the reproducibility and the repeatability of the fiber. The fibers sustain more than 200 extractions during which they remain chemically stable and maintain good performances (detection limits lower than 2 mu g/l, repeatability, etc.). Considering their robustness together with their easy and inexpensive fabrication, these fibers could constitute promising alternatives to existing products.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10