This study was conducted to determine the effect of gelatin reology on mechanical, physical and morphological properties of gelatin-based edible films. The aim of this study was to better understand the variation of viscosity on the structural behaviour of gelatin-based films in the presence of glycerol and sorbitol plasticizers. Gelatin-based films were casted by using gelatins of different viscosities as 2.5, 3.0 and 3.5 centipoise with plasticisers as glycerol and sorbitol. Finally, the physical, mechanical and morphological properties of the films were investigated via pH, thickness, tensile strength and elongation, fourier transform infrared spectroscopy and scanning electron microscopy. As a result of the study, it was observed that a durable film structure could be obtained with gelatin viscosity at 3 centipoise. Furthermore 5.5% gelatin, 0.1% glycerol and 0.4% sorbitol concentration were found as the most suitable formulation for gelatin based film structure with Tukey Test. The results suggest that gelatin-plastisizer combinations can be an excellent source of biobased packaging material with further investigations.

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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 spinning technique, 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.

N-methylpyrrole (N-MPy) and 2,2-bithiophene (BTh) were electrocopolymerized in 0•2 M acetonitrilesodium 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 circuit model of R(C(R)(QR)(CR)) was performed to fit theoretical and experimental data. The highest low-frequency capacitance (C LF) were obtained as C LF = ∼ 1•23 × 10 −4 mF cm −2 for P(N-MPy), C LF = ∼ 2•09 × 10 −4 mF cm −2 for P(BTh) and C LF = ∼ 5•54 × 10 −4 mF cm −2 for copolymer in the inital feed ratio of [N-MPy] 0 /[BTh] 0 = 1/2.

Among conducting polymers, polycarbazoles are known for their good electro-activity [1,2] and thermal [3][4][5], electrical [6], photo-physical [7], and electrochromic properties [8]. They have been suggested for a number of applications, such as electroluminescent devices [9], sensors [10,11], redox catalysts [12], and electrochromic displays [13]. The functional groups, such as amino, imino and sulfonic groups have been performed for achieving new polymers which meet the criteria of commercial applications [14][15][16]. There are many novel syntheses of functional polycarbazole papers. 3,6-bis (2,3-dihydrothieno [3,4-b] N-(o-ethynyl) Abstract. A novel synthesis of 4-toluene 9H-carbazole-9-carbodithioate (TCzC) was chemically synthesized and characterized by Fourier Transform Infrared (FTIR), proton nuclear magnetic resonance ( 1 H-NMR), and carbon nuclear magnetic resonance ( 13 C-NMR) spectroscopies. Specific (C sp ) and double layer capacitances (C dl ) of the electro-coated poly(carbazole) and poly(TCzC) films were obtained on glassy carbon electrode (GCE) by impedimetric method with DC potential from -0.1 to +1.0 V by increasing potential of 0.2 V. The polymers were characterized by Cyclic voltammetry (CV), Fourier transform infrared reflectance-attenuated total reflection spectroscopy (FTIR-ATR), Atomic force microscopy (AFM), and Electrochemical impedance spectroscopy (EIS). The use of additional variable (DC potential) helped to disambiguate the equivalent circuit model of R (C(R(Q(RW))))(CR).Simulation results were compared with experimental data. In this study, substituted group effects of CS 2 and tosyl on carbazole polymer were investigated by EIS technique. CS 2 group together with tosyl group in the structure of carbazole decreased the specific capacitance value (C sp = 0.43 mF·cm -2 ) compared to PCz (C sp = 1.44 mF·cm -2 ). Electropolymerization formation was seriously affected by substituted groups of CS 2 and tosyl on conjugation system because of the electron donor and acceptor ability.

In this study, we proposed to investigate how the effect of electron‐donating methyl (CH3) group at p‐position of amin (NH2) group in aminophenol (AP) compound affected thermal stability, optical, electrochemical properties, and conductivity measurement. For this reason, we choice 2‐AP and 2‐amino‐4‐methylphenol compounds and synthesized phenolic monomers by condensation reactions 4‐fluorobenzaldehyde with aromatic amino phenols. Then, these monomers were converted to their polyphenol derivatives by oxidative polycondensation reactions in an aqueous alkaline medium. Structural characterizations were carried out by FTIR, NMR, and size exclusion chromatography. Cyclic voltammetry was used to determine the electrochemical oxidation‐reduction characteristics. Optical properties were investigated by UV–vis and fluorescence analyses. Solid state electrical conductivities were measured on polymer films by four‐point probe technique using an electrometer. Thermal data of monomer/polymer and polymers were obtained by TG‐DTA and DSC techniques, respectively. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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