Ch emical syn thesis an d characte rization o f poly(۳- methylthio phene)/S iO۲ nanocom posites by inverted emulsion t echnique

Poly(۳ -methylthio phene) (P۳MTh) as o ne of the most important electrically cond uctive polymers is both organo-soluble and melt processable. It has goo d chemical and environmental stability with excellent electronic and optical properties suitable for v arious device application s [۱]. Moreover, it has been demonstrated that the deposition of meta l and metal oxide nanoparticles in polymer matrixes re sults in ad vanced materials, so- called polymer-based nanocomposites [۲,۳]. In this stud y, P۳MTh/SiO۲ nanocomposites were synthe sized by inverted emulsion techni que using t wo anionic emulsifiers including so dium dodecylbenzenesulfonate (SDBS) and sodium poly(styrene sulfon ate) (SPSS).Mate rials and m ethods: All c hemicals we re purchas ed from Si gma-Aldrich and used without further purification. Firstly , into a ۱۰۰ -mL round-bottomed flask, toluene (۴۰ mL), S DBS or SPSS (۰.۵۰۰ g ) and nanosized SiO۲ (۰.۰۵۰ g) were poured, respectively while stirrin g at room temperature. In the secon d step, the solution of ۳ -methylthio phene monomer (۷ mm ol, ۰.۶۸۷۱ g) in toluene (۱۰ mL) w as added dr opwise to t he vessel. Finally, the so lution of Fe Cl۳ oxidant (۷ mmol, ۰.۶۸۷۱ g) in d eionized wa ter (۱۰ mL) was added. The mixture was then stirred for another ۳ h at room temperature to yie ld a greenish black mixture. Methanol (۱۰۰ mL ) was adde d to the system to precipitate the products.

کلیدواژه ها:

Nanocomposite ، Poly(۳-meth ylthiophene ) ، Surfactant ، Electron microscopy.