Nghiên cứu khả năng chống ăn mòn của nanocompozit poly(anilin-Co-O-toluidin)/-Fe2O3

Poly(aniline-co-o-toluidine) (PAT)/Fe2O3 (PATF) nanocomposite were synthesized by electrochemical methods on 316L stainless steel electrode. Aniline (ANi) and o-toluidine (o-Tol) were dissolved in 0.5 M H2SO4 and α-Fe2O3 with different mass ratios were added in the solution. The solution was stirred by speed of 200 rpm during the process. The obtained nanocomposite material were washed by double distilled water to pH = 7, dried and then pulverized. The composite were dissolved in N,N-dimethylformamide (DMF) in 24 hours. The DMF containing nanocomposite was coated on CT3 carbon steel electrodes, the electrodes were dried from 70 to 80 oC for 24 h. Anticorrosion properties of the coating were measured by electrochemical techniques in 3 % NaCl solution at room temperature, were shown by potential corrosion (Ecor), corrosion current (Icorr) and polarization resistance (Rp) parameters. Keywords. Corrosion, nanocomposite, poly(aniline-co-o-toluidine), electrochemical, Fe2O3

Tác động của tỉ lệ monome (ANi/o-Tol) đến một số tính chất của nanocompozit copolyme (ANi/o-Tol)/Fe2O3 nano

Nano composites PANi/POT/Fe2O3 synthesized by electrochemical method on 316 stainless steel in sulfuric acid solution  0.5 M,  with diferent wt-ratios aniline/o-toluidines: 10/0, 9/1, 8/2, 7/3, 6/4, nanoscale Fe2O3 2 % by weight of monomers, scan rate of the CV is 50 mV/s, step 5 mV and from -0.2 V to 1 V (SCE). PANi/POT/Fe2O3 was filtered, washed with distilled water to pH 7 then dried. Some principal properties of the nanocomposite were studied using CV technique, infrared spectroscopy (IR), thermal analysis (TGA), scanning electron microscopy (SEM) and tranmition electron microscopy (TEM). With increasing the ratio of o-Tol, the oxidation potential of the copolymer was increased and however the reduction potential was decreased. The presence of Fe2O3 provides a higher conductivity of the obtained nanocomposites

Tuyển tập truyện cổ tích Việt Nam : phần truyện cổ tích người Việt

271 tr. ; 20 c