کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
186322 459610 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Towards conducting inks: Polypyrrole–silver colloids
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Towards conducting inks: Polypyrrole–silver colloids
چکیده انگلیسی


• Composite colloidal particles combining conducting polymer and metal have been prepared.
• Conducting colloids are suitable for printing applications.
• Polypyrrole/silver colloids are prepared in a single reaction step.
• The conductivity control is discussed and still needs improvement.

The oxidation of pyrrole with silver nitrate in the presence of suitable water-soluble polymers yields composite polypyrrole–silver colloids. The polypyrrole–silver nanoparticles stabilized with poly(N-vinylpyrrolidone) have a typical size around 350 nm and polydispersity index 0.20, i.e. a moderate polydispersity in size. Similar results have been obtained with poly(vinyl alcohol) as stabilizer. The effect of stabilizer concentration on the particle size is marginal. In the present study, several types of stabilizers have been tested in addition to currently used poly(N-vinylpyrrolidone). Transmission electron microscopy and optical microscopy revealed the gemini morphology of polypyrrole and silver colloidal nanoparticles and confirmed their size and size-distribution determined by dynamic light scattering. The use of colloidal dispersions provides an efficient tool for the UV–vis and FT Raman spectroscopic characterization of polypyrrole, including the transition between polypyrrole salt and corresponding polypyrrole base. The dispersions were used for the preparation of coatings on polyethylene terephthalate foils, and the properties for polypyrrole–silver composites have been compared with those produced from polypyrrole colloids alone.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 122, 10 March 2014, Pages 296–302
نویسندگان
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