PAN Solution Research Articles

Fabrication of photocatalytic PAN nanofiber membrane loading with TiO2@RGO by electro-spinning & electro-spraying

The new fibrous photocatalytic nanofiber membrane with both good photodegradation performance and mechanical property was developed. Here, TiO2@RGO (TR) which could disperse in PAN solution stably was prepared by solvothermal method with the help of acetic acid. Then the new photocatalytic PAN nanofiber membrane SS7.5-2.3 TR(A) was fabricated for the first time by electro-spinning & electro-spraying, where TR ruled as photocatalysts. Benefited from its novel triple structure, SS7.5-2.3 TR(A) had the best toughness when compared with S-0 (electro-spun dual-network structural membrane) and SS7.5 (control membrane without TR in electro-spraying solution). Moreover, the morphology and mechanical property of membrane was similar to that of original SS7.5-2.3 TR when it was used to photodegrade methyl orange solution five times later. Meanwhile, SS7.5-2.3 TR also had significant photocatalytic performance when applied to the degradation of other three dyes (rhodamine B, methylene blue and oil red) and silk dyeing wastewater, which indicated its potential in dyeing wastewater treatment.

Polyacrylonitrile (PAN)/Freeze-dried Chitosan (FCS)-NaY zeolite triple layer nanostructure fibrous adsorptive membrane (PAN/FCS-NaY TNAM) for Cu(II) and Pb(II) ions removal from aqueous solutions

In this study, an innovative PAN/FCS-NaY TNAM was fabricated using an electrospinning technique for Cu(II) and Pb(II) removal from contaminated water. Top and bottom fibrous layers (M1) were fabricated using a combination of FCS and PAN blends. Middle layer (M2) was electrospun from pure PAN solution and loaded with NaY zeolite particles. The physicochemical properties of the material and fibrous samples were investigated through SEM, FTIR-ATR, DSC, AFM, DMTA analysis, and contact angle measurement. The effective parameters, including initial ions concentration, time, reusability, and pH on the dynamic adsorption performance of the prepared membrane and its stability in the aqueous medium for Cu(II) and Pb(II) ions removal were investigated at a pressure of 0.006 bar. Dynamic metal ions adsorption was modeled using dynamic filtration prediction models such as Thomas and Yoon-Nelson. The fabricated nanostructure fibrous membranes with the removal percentage of Cu(II) and Pb(II) ions (94.6% and 98.7%, respectively) under the optimal operating conditions (initial concentration: 50 ppm, time: 10 min, and pH: 4.6), high compatibility in modeling dynamic filtration (R2 > 0.99), high pure water flux (298 LMH), suitable reusability (four-cycle without significant reduction in adsorption) as well as long-term stability, can be as potential filters in water treatment applications.

The effect of Cu ions concentration on electrochromic properties of Cu embedded PANI thin films

In this paper, copper salt (CuSO4.5H2O) has been used to improve electro-optical performances of PANI electrochromic layers including color switching rate (from transparent to colored state) and stability. For this purpose, the PANI solution was chemically prepared in the presence of different amounts (0.018, 0.03, 0.25, 0.5 and 2.5%w) of copper ions concentration by electrodeposition technique on a fluorine doped tin oxide (FTO) glass, which was used as a transparent conductive electrode and substrate. Finally, the five PANI/Cu samples were characterized and compared with pure PANI electrochromic layer. As a result, with cyclic voltammetry analysis and photospectroscopy, in the most optimal amount of copper (0.03%w) the optical contrast of the Cu embedded PANI electrochromic layer enhanced from 15% to 52.5%, its coloring time improved from 3 s to 1.3 s and its stability was the best.

Structural–Morphological and Rheological Features of Joint Solutions of Cellulose and PAN Copolymer in N-Methylmorpholine-N-Oxide

Mixed 18% solutions of cellulose and PAN terpolymer containing methyl acrylate and methylsulfonate comonomers in N-methylmorpholine-N-oxide have been obtained over the entire range of compositions. All the obtained systems based on cellulose and PAN are biphasic, and the morphological features of the emulsions change from highly dispersed isotropic to fibrillar depending on the phase composition and the intensity of the deformation effect. At high shear stresses that emerge during preparation of the solutions in an extruder, all emulsions are characterized by the same microheterogeneous morphology, which is transformed into fibrillar by deformation. An IR spectroscopic study has established that in the preparation process, specific interactions occur between the functional groups of macromolecules of the cocomponents, leading to the formation of PAN/cellulose associates, which undergo hydrophobic repulsion along the interfaces. It is this process that initiates the fibrillation of the cellulose solution phase in the presence of a PAN solution during deformation. The rheological behavior of mixed solutions over the entire range of concentrations in continuous and dynamic modes at temperatures of 110–130°C is a direct consequence of the phase composition and morphological transformations occurring during deformation. Emulsion compositions characterized by viscoelastic properties that make it possible to successfully form composite fibers have been chosen.

Colorimetric-Based Concentration Measurement of Manganese Ions using Spectroscopy Approach

This paper presents the spectroscopy analysis of manganese ions (Mn2+) to investigate the correlation between its concentration and optical absorbance at different wavelength spectra. This work was performed as a preliminary work to establish guidelines and references for future work in developing a monochromatic light-based colorimetric system for concentration measurement of Mn2+. The samples were prepared at the concentration range of 0.2–1.0 ppm using a colorimetric reagent (i.e., 0.1 % PAN solution) that produced an orange-based coloured solution. Qualitative analysis was performed to obtain the absorbance spectra, which are significant in identifying the suitable colour of monochromatic light (e.g., LED), as well as to predict the settling time for steady-state condition before the measurement could be taken. The results showed that for the range of concentration studied, the blue to cyan region gives the best absorbance with peak absorbance wavelength occurred at around 495 nm. Testing at the time interval between 30 and 90 min after sample preparation also gives the indication of the steady-state condition for a complete colorimetric reaction. Then, quantitative analysis was performed to obtain a standard calibration curve that relates optical absorbance and Mn2+ concentration. The curve is significant to serve as a standard reference for the results to be obtained during colorimetric system development. The calibration curve gives a good linearity at R2 = 0.99, thus verifying the sample preparation and measurement procedures, as well as instrumentation setting used in this work.

Bioactive Silvadur loaded polyacrylonitrile nanofibrous membranes for wound dressing applications

Persistent wounds are the most problematic for the patient as well as for the health system. Skin wounds are most exposed to bacterial attacks, which not only cause wound infections but also slow down the healing process. There is a dire need to develop a better wound dressing or scaffold material that can increase the wound healing process. This study involves the development of electrospun nanofibers based on Silvadur-loaded polyacrylonitrile membranes. Samples were developed by using five different concentrations (2 wt%, 4 wt%, 6 wt%, 8 wt%, and 10 wt%) of Silvadur loaded in PAN solution. Resultant nanofibers were characterized by SEM, FTIR, XRD, and antibacterial tests. SEM analysis confirms that all the prepared electrospun nanofibrous membranes have smooth and beads-free surfaces. The average diameter of developed nanofibers lies in the range of 150 nm to 190 nm. It was confirmed that as the concentration of Silvadur increased the diameter of nanofibers also increased due to the increase in the viscosity of the electrospinning solution. FTIR interpretation confirms that the interaction between the PAN and Silvadur is physical, not chemical. XRD analysis reflects the crystallographic and macromolecular structure of prepared electrospun nanofibers. A qualitative antibacterial test was performed to check the antibacterial properties of prepared electrospun nanofibers against gram-negative bacteria (Escherichia Coli) and gram-positive bacteria (Staphylococcus Aureus). The result reveals that nanofibers loaded with the maximum concentration of Silvadur show the maximum antibacterial activity of 92.25% against Escherichia Coli and 98.52% against Staphylococcus Aureus. The higher antibacterial activity against gram-negative bacteria is due to the thinner cell wall as compared to the gram-positive bacteria.

Enhanced broadband microwave absorption of Fe/C core-shell nanofibers in X and Ku bands

Fe/C core-shell nanofibers were prepared via a coaxial electrospinning technique integrated with high-temperature carbonization, in which the Fe(NO3)3-containing PAN solution and Fe(NO3)3 constituted the shell and core structures, respectively. The core-shell structure was perfectly maintained after carbonization, and Fe nanoparticles were uniformly distributed within the carbon nanofibers. The effects of the microscopic morphology and crystallinity of the carbon components on the electromagnetic properties, matching characteristics, and electromagnetic wave absorption properties of the Fe/C nanofibers were investigated by adjusting the carbonization temperature. As-prepared Fe/C-800 °C core-shell nanofibers mixed with 10 wt% of paraffin showed a minimal reflection loss (RLmin) of −20.6 dB under 11.52 GHz at 2.5 mm of thickness and lower than −20 dB under 2.3–5.0 mm of thickness. The efficient absorption bandwidth (EAB) was 6.24 GHz in the range of 11.76–18 GHz at 2.1 mm, covering the whole Ku band. The absorption bandwidth can cover the whole X and Ku bands by varying the sample thickness. The efficient absorption bandwidth was 3.84 GHz in the range of 8.08–11.92 GHz at 2.9 mm, covering the X band. The effective complementarities between the magnetic loss of Fe nanoparticles, the dielectric loss of PAN-based carbon, and the core-shell structure promoted impedance matching and multiple interface polarization, endowing the produced composites with prominent absorption characteristics of microwaves. Therefore, the prepared Fe/C core-shell nanofibers are an ideal lightweight and broadband electromagnetic wave (EMW)-absorbing material that exhibits high-performance microwave absorption.

Unique Decoration of NiO Nanostructures on the Electrospun Carbon Nanofibers for High Performance Supercapacitor

Carbon materials having fibrous structures and large specific surface area have shown the great utility value as an electrode material and catalyst support because they present excellent chemical stability, good ionic fluidity and electrical conductivity. Recently, the combination of carbon nanofibers (CNFs) and transition metal oxides such as NiO are received a great deal of interest as effective electrode materials for high performance electrochemical. In the present work, NiO decorated CNFs materials were prepared by the hydrothermal growth of NiO on the surface of electrospun CNFs at low temperature. For CNFs preparation, the electrospinning method was adopted by using 10% PAN solution with the electrospinning conditions like stock feeding rate of 0.5 ml/h and supplying a constant voltage of 15 kV. The obtained PAN mat was first under gone by stabilization at 280oC for 2h and then performed the carbonization in a tube furnace under N2 atmosphere at 800°C for 2 h. The prepared electrospun CNFs and decorated NiO/CNFs were extensively analyzed by various experimental tools such as FE-SEM, TEM, XRD, FTIR and Raman analysis. The structural and crystalline observations deduced the significant and uniform decoration of NiO nanostructures on electrospun CNFs. The decorated NiO/CNFs were applied as electrode for fabricating the electrochemical supercapacitor by measuring cyclicvoltametry (CV) and galvanostatic charge/discharge (GCD). The decorated NiO/CNFs electrode attained the good specific capacitance with excellent rate capability in 1M Na2SO4 solution as electrolyte. Therefore, the decorated NiO/CNFs would be highly promising material for high performance supercapacitors.

Iron ion assisted photocatalytic-adsorptive removal of acid orange 52 by immobilized TiO2/polyaniline bilayer photocatalyst

In the present work, Fe3+ ion was incorporated into polyaniline crosslinked with polyvinyl alcohol-glutaraldehyde (abbreviated as PPG) synthesized via chemical polymerization to remove acid orange 52 (AO52) dye from the solution. The use of polyvinyl alcohol-glutaraldehyde (PG) as adhesive within the synthesized PANI solution decreased the surface area from 9.16 to 3.65 m2 g−1 but the addition of iron (Fe) and silicate (Si) ions has re-increased the surface area to 13.80 m2 g−1. The optimal conditions of Fe-PPG sub-layer was found through adsorption process with varied loading and pH of AO52 solution. The adsorption characteristics of immobilized Fe-PPG showed that the adsorption of AO52 obeyed the pseudo second order kinetic and Freundlich isotherm models. Upon coating with TiO2, the presence of Fe3+ ion was observed to enhance the electron-hole separation as well as visible light response of the TiO2/PPG photocatalyst leading to improvement in photocatalytic-adsorption of AO52 dye. The TiO2/Fe-PPG was highly reusable for at least 10 cycles of continuous AO52 dye removal application.

Adsorption Kinetics of an Activated Carbon Glass Composite Prepared Using Acrylic Waste Through Laser Treatment

This work explains a novel method of producing activated carbon using laser treatment. Acrylic coated glass samples were developed by padding a glass non-woven sheet in 30% acrylic fibre solution (PAN solution) from waste acrylic bathmats. Samples were then dried and cured at different temperatures. After curing, stabilisation was performed at 230 °C with a heating rate of 50 °C hr-1. Infrared laser irradiation was performed on the stabilised web using a commercial pulsed infrared laser for carbonisation. The resultant acrylic glass carbon composite (AGCC) was characterised with the help of x-ray diffraction analysis, energy dispersive w-ray, and a scanning electron microscope to determine the increase in crystallinity as well as the percentage of carbon and surface roughness of the carbon glass composites. The adsorption capacity of the activated carbon (AC) glass composite prepared was determined by changing process inputs like the concentration of dye, the amount of AC glass composite, the agitation speed and pH. The results were analysed through different adsorption isotherms. It was established that the Freundlich model can more effectively describe results due to the development of heterogeneous surface characteristics. The kinetics of adsorption were studied using first order and second order models.

Lignin addition to polyacrylonitrile copolymer solution and its effect on the properties of carbon fiber precursor

Polyacrylonitrile copolymer (PAN) fiber and PAN/lignin (PL) fiber were wet spun from the PAN copolymer solution and PAN/Lignin blend solution using dimethyl sulphoxide (DMSO) solvent. A blend of 90% by weight (wt %) PAN terpolymer and 10wt% lignin dissolved in DMSO was used in wet spinning of PL fiber. Viscoelastic properties of PAN solution and PAN/lignin solution in DMSO were determined by rheometer. The properties of precursor fiber with and without lignin were evaluated by differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and mechanical testing. The diffusion of lignin out of coagulated filament was observed during wet spinning of PL solution and was quantitatively estimated by UV–Vis studies. DSC results showed that blending lignin with PAN copolymers can improve the thermal oxidation performance of the precursor fiber and accelerate the thermal stabilization process. A schematic illustration has been deduced for the decrease in tensile strength of PL fiber compared to that of PAN fiber.

Research on the mechanism of gel accelerator on gel transition of PAN solution by rheology and dynamic light scattering

Abstract The rheological properties of PAN/DMSO solution and the size and distribution of PAN coils were studied by rheology and dynamic light scattering (DLS) measurements. It was found that water could be used as a gel accelerator and increase the gel transition temperature T gel and the storage modulus G′ as well as decrease the damping factor tan δ through rheological measurements. DLS test shows that the average size of PAN coils increases significantly with the increase in gel accelerator content. In addition, the gel accelerator can change the mobility of PAN chains during the cooling process. The results show that the gel accelerator can enhance the entanglement of PAN macromolecular chains and improve the formation of three-dimensional network gel structure, so that PAN solution is more prone to gel transition during the cooling process.

Electrospinning preparation of PAN/TiO2/PANI hybrid fiber membrane with highly selective adsorption and photocatalytic regeneration properties

Fiber membranes for pollutants removal have attracted more and more attentions owing to their high adsorption performance and easy recovery properties. However, some adsorption membranes are short of reusability performance due to lack of environment-friendly regeneration approach and low regeneration efficiency especially in terms of chemical adsorption. Herein a polyacrylonitrile/ titanium dioxide/ polyaniline (PAN/TiO2/PANI) hybrid fiber membrane was successfully prepared by electrospinning of PAN solution with TiO2 particles and subsequent in-situ oxidative polymerization of aniline (ANI) on PAN/TiO2 fiber membranes. The obtained fibers have ~200 nm in width with PANI and TiO2 particles dispersed uniformly. Importantly, such hybrid membrane could remove Congo red effectively and completely in water. Detailed investigation reveals that the adsorption behavior fits Langmuir model well which indicates chemical related adsorption. In addition, the membranes could be recycled by photocatalytic degradation under visible light irradiation. After 4 times photocatalytic regenerations, the regeneration efficiency and removal rate could still remain ~60% and upon 50%, respectively, higher than that of water-wash regeneration (only 2%). Such extraordinary performance could also extend to heavy metals [such as Cr (VI)]. After equilibrium adsorption, the adsorbed Cr(VI) on membrane could be reduced and desorbed through visible light photocatalytic procedure, leading to an effective regeneration. This work not only demonstrates the possibility and validity of the PAN/TiO2/PANI hybrid fiber membrane as promising environment-friendly adsorbent for pollutants removal, but also gives further insight into understanding the adsorptive behavior of the hybrid membrane.

Electrospun three-dimensional cobalt decorated nitrogen doped carbon nanofibers network as freestanding electrode for lithium/sulfur batteries

Cobalt decorated nitrogen doped carbon nanofibers (Co, N-CNFs) were successfully fabricated by electrospinning technique based the cobalt based zeolitic-imidazolate frameworks-67 (ZIF-67)/PAN solution as precursor. The as-synthesize fibrous Co, N-CNFs membrane was employed as positive current collector containing Li2S6 catholyte solution for lithium sulfur batteries. Co, N-CNFs inhibited the dissolution of polysulfides shuttle effect and demonstrated as positive catalyst accelerating kinetic redox reaction of lithium polysulfides/sulfide. In addition, metallic cobalt achieves the purpose of reducing polarization and increasing specific capacity by promoting nucleation of lithium sulfide on the surface of Co, N-CNFs. Li2S6 catholyte impregnated Co, N-CNFs electrode (sulfur loading: 4.74 mg) exhibits the first discharge capacity of 1166 mA h g−1 and matins at 938 mA h g−1 after 300 cycles at 0.2 C, which is superior cycling performance than N-CNFs. Even at 7.11 mg sulfur loading, the composite electrode shows a high area capacity of 6.47 mA h cm−2. Furthermore, a steady-state of lithium anode resulting through effective suppression of polysulfide shuttle effect is also demonstrated to contribute significantly to enhance electrochemical performance.

Fabrication of a Novel Electrospun Polyacrylonitrile/Giant Ball {Mo132} Composite Nanofibrous Mats in Adsorption of 2-CEES

Background: Polyacrylonitrile/Mo132 composite nanofibers mats was synthesized by an electrospinning technique using PAN and giant ball nano-polyoxomolybdateMo132. The nanocluster Mo132 was mixed with PAN solution and then electrospun to produce bead-free nanofibers. The aim of this study is to evaluate the adsorption ability of electrospun composite nanofibers against sulfur mustard stimulants and assess the possibility of using the electrospun nanofibers as protective membranes in chemical masks and warfare clothing. Adsorption of sulfur mustard stimulants was investigated on the surface of PAN nanofibers embedded with keplerate nano-polyoxomolybdate. Methods: In order to study the 2-CEES adsorption ability, the prepared PAN/Mo132 nanofibers composite was further prepared and exposed to 2-CEES solution. The surface morphology and other properties of the PAN/Mo132 nanofibers composite were characterized by various techniques, including SEM, TEM, FT-IR, UV-Vis. SEM images which showed that the average diameter of the fibers was found to be between 100-120 nm. Results: The adsorption efficiency of PAN/Mo132 composite in adsorption of 2-CEES was obtained 89% after 7h at room temperature. The results showed that composite nanofibers PAN/Mo132 will have a good ability as protective clothing and chemical masks against chemical warfare agents. Conclusion: PAN/Mo132 nanofibers were prepared by electrospinning method. The leaching of Mo132 from the nanofibers was not observed, meaning that the catalyst had excellent stability and could be used as a heterogeneous structure against the adsorption of sulfur mustard stimulant at room temperature. This composite nanofibers membrane exhibited good performance to adsorb 2-CEES in comparison with pure PAN. The adsorption rate of 2-CEES increases with increasing the amount of Mo132 embedded in the PAN nanofibers.

Preparation and their thermal properties of the nanodiamond/polyacrylonitrile composite nanofibers generated from electrospinning

Nonadiamond (ND) are renowned as superlative material due to their relatively high thermal conductivity and hardness while comparing with any bulk materials. In the paper, the polyacrylonitrile/nanonodiamond (PAN/ND) precursors were fabricated via electrospinning using the PAN solution incorporated with ND at an alteration of mass fractions. The C/ND nanofibers were preparation from the carbonization of PAN/ND precursors. And then, composite nanofibers are characterized by scanning electron microscope (SEM), fourier transform infrared spectroscopy (FTIR), and so on. The results show that the thermal conductivity of the C/ND nanofiber composite nanofibers with 50 wt% ND incorporation reached 6.7 W/(m•k), which is about 2.7 times that of the C/ND composite nanofiber without ND.

The Use of Mixed Organic/Ionic Liquid Electrolytes with Forcespun Metal Oxides/Carbon Microfiber Electrodes in Lithium Ion Batteries

We present results on the Forcespinning (FS) of PAN solution precursors for the mass production of metal/oxides carbon (MO/C) composite microfibers as anode materials for Lithium-ion batteries. The MO/C composite microfiber anodes are produced using a scalable technique (FS) and subsequent thermal treatment (calcination). The composite anodes were porous and flexible. The flexible composite microfibers were directly used as binder free electrodes in lithium-ion batteries. Mixed organic/ionic liquid electrolytes (MOILEs) were employed in Lithium ion cell cycling studies with the MO/C composite fibers and composite fiber cathodes to investigate the electrochemical and cycling performance of the Li-ion cells. The ionic conductivity of MOILEs and the electrochemical performance of LIB cells were investigated at different temperatures and current rates. 1-Ethyl-3-Methyl-imidazolium Lithium bis(trifluoromethanesulfonyl) imide (EMI-TFSI) ionic liquid was synthesized in our laboratory by reacting the EMI cation and TFSI ion in a 1:1 mole ratio. The EMI-TFSI ionic liquid and LiTFSI salt were mixed with organic liquids (Ethylene carbonate (EC) dimethyl carbonate (DMC) and Succinonitril (SN) to improve the ionic transport of the electrolyte during the charge/discharge cycles. The MO/C composite electrodes delivered a good electrochemical performance and Columbic efficiency when used as half and full cells. The electrochemical performance of the Forcespun composite fiber cathodes was also investigated in half-cell cycling.

Microwave Absorption and Electrical Properties of Coated Polyester Fabric with Cobalt Ferrite and Polyaniline

In this study, the CoFe2O4-PANI/PET fabric with microwave absorption and electrical properties was successfully prepared by a facile method. Firstly, the PANI in emeraldine base form was prepared by chemical oxidative polymerization. Secondly, the CoFe2O4 nanoparticles and PANI solution were uniformly dispersed in epoxy resin and coated on the PET fabric. Finally, the conductive properties of the coating surface were obtained by doping. The resultant fabric was investigated by FTIR, SEM and TGA to check its chemical structure, surface morphology and thermal stability. The results of this fabric demonstrated efficient microwave absorption performance and broad absorption bandwidth, which indicating its potential application in microwave adsorption fields.

Preparation of amidoxime‐modified polyacrylonitrile nanofibrous adsorbents for the extraction of copper(II) and lead(II) ions and dye from aqueous media

ABSTRACTAmidoxime‐modified polyacrylonitrile nanofibrous films (AOPAN NFs) were prepared via an electrospinning technique. The traditional preparation methods for amidoximated polyacrylonitrile (AOPAN) solution were changed and improved. First, the PAN solution was modified by hydroxylamine hydrochloride to produce an AOPAN solution, and then, a small amount of inhibitor was added to the AOPAN solution for electrospinning. We found that the crosslinking of the AOPAN solution was inhibited by the addition of a small amount of inhibitor; at the same time, the storage time of the AOPAN solution was prolonged. In addition, the prepared AOPAN solution was electrospun into nanofibrous films, which could be used as excellent adsorption materials for Cu(II), Pb(II), and methyl orange (MO) after drying. The maximal adsorption capacities for Cu(II), Pb(II), and MO were 143.47, 178.57, and 68.07 mg/g, respectively. The adsorption capacities of the nanofibrous films were more than 50% that of the first adsorption after four recycling runs; this indicated the reusability of the nanofibrous films for water treatment. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45697.

Influence of the thickness and roughness of polyaniline coatings on corrosion protection of AA7075 aluminum alloy

Polyaniline coatings of various controlled thicknesses are applied to 7075-T6 aluminum alloy substrates and evaluated for their corrosion protection ability in a corrosive saline environment using electrochemical techniques. The coating thicknesses are in the range of approximately 5 to 35μm and they increase linearly with increasing quantities of PANI solution deposited on the substrate. The relationship between the coating thickness, roughness, and hydrophilicity is examined. Coatings ranging from 12 to 23μm in thickness have the lowest roughness values and highest contact angles with water. The PANI-coated 7075 alloy electrodes with low roughness and high contact angles show better corrosion protection properties in saline solution (3.5% NaCl), as determined by electrochemical impedance spectroscopy (EIS) and voltammetric polarization measurements. Scanning electronic microscopy (SEM) images demonstrate the homogenous surface morphology of the PANI coatings on the micrometer scale. Even after prolonged exposure to corrosive media, no cracks were found.