Articles written in Bulletin of Materials Science
Volume 36 Issue 7 December 2013 pp 1281-1290
Electrochemical copolymerization of 𝑁-methylpyrrole and 2,2'-bithitiophene; characterization, micro-capacitor study, and equivalent circuit model evaluation
Murat Ates Fatih Arican Tolga Karazehir
𝑁-methylpyrrole (𝑁-MPy) and 2,2'-bithiophene (BTh) were electrocopolymerized in 0.2 Macetonitrile–sodium perchlorate solvent–electrolyte couple on a glassy carbon electrode (GCE) by cyclic voltammetry (CV). The resulting homopolymers and copolymers in different initial feed ratios of [𝑁-MPy]0/[BTh]0 = 1/1, 1/2, 1/5 and 1/10 were characterized by CV, Fourier-transform infrared reflectance attenuated transmittance (FTIR–ATR), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and electrochemical impedance spectroscopy (EIS). The capacitive behaviours of the modified electrodes were defined via Nyquist, Bode-magnitude, Bode-phase and admittance plots. The equivalent circuitmodel of R(C(R)(QR)(CR)) was performed to fit theoretical and experimental data. The highest low-frequency capacitance (𝐶LF) were obtained as 𝐶LF = ∼ 1.23 × 10-4 mF cm-2 for P(N-MPy), 𝐶LF = ∼ 2.09 × 10-4 mF cm-2 for P(BTh) and 𝐶LF = ∼ 5.54 × 10-4 mF cm-2 for copolymer in the inital feed ratio of [𝑁-MPy]0/[BTh]0 = 1/2.
Volume 45 All articles Published: 24 May 2022 Article ID 0093
Fabrication of gelatin nanofiber webs via centrifugal spinning for N95 respiratory filters
FATIH ARICAN AYSEGUL UZUNER-DEMIR OGUZHAN POLAT AYKUT SANCAKLI EZGI ISMAR
Due to the impact of the Covid-19 pandemic, the usage of numerous protective face masks has faced an explosion in demand around the world. Therefore, the need to reduce the environmental pollution caused by disposable single-use face masks has become vital. Recently, alternative raw material solutions have been discussed to eliminate the consumption of single-use plastics. Within this research, gelatin nanofibers were fabricated via centrifugal spinningtechnique, and filtration media were investigated in terms of air permeability and filtration efficiency. In addition, morphological properties were examined with scanning electron microscopy. Fabricated fibers have a changing average diameter range from 232 to 778 nm, and targeted 95% filtration efficiency was achieved in several compositions. It was proven that biodegradable gelatin nanofibers could be a sustainable alternative for disposable N95 respiratory filters.
Volume 46, 2023
Continuous Article Publishing mode
Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020
Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020
Click here for Editorial Note on CAP Mode