Dodecylbenzenesulfonic Acid Sodium Research Articles

Biological responses in Danio rerio by the disinfectant SDBS in SARS-CoV-2 pandemic

The use of disinfectants, such as Sodium Dodecylbenzene Sulfonic acid salt (SDBS), has grown since the SARS-CoV-2 pandemic, with environmentally unknown consequences. The present study analyzed SDBS effects in the fish species Danio rerio, using a combination of biomarkers. Our data reported that larvae had their total locomotor activity increased when exposed to 1 mg/L of SDBS, but this parameter was decreased in fish exposed to 5 mg/L. A significant increment of erratic movements was reported in fish exposed to 1 and 5 mg/L of SDBS. These concentrations inhibited CYP1A1/CYP1A2, and of GSTs inhibition, suggesting SDBS is not preferentially biotransformed by these routes. Results concerning the antioxidant defense biomarkers (CAT and GPx) showed no straightforward pattern, suggesting SDBS exposure may have resulted in changes in redox balance. Finally, acetylcholinesterase activity increased. In summary, increased use of SDBS in a near future may result in deleterious effects in environmentally exposed fish.

Potassium nickel hexacyanoferrate–polyacrylonitrile composite for removing cobalt, strontium, and cesium from radioactive laundry wastewater

AbstractThe applicability of potassium nickel hexacyanoferrate–polyacrylonitrile (KNiFC–PAN) for the sorption of Co2+, Sr2+, and Cs+ from radioactive laundry wastewater generated in nuclear power plants was investigated. Competitive sorption of Co2+, Sr2+, and Cs+ onto KNiFC–PAN was studied for single, binary, and ternary solutions. The Langmuir, Freundlich, Kargi–Ozmıhci, Koble–Corrigan, and Langmuir–Freundlich models predicted the single‐sorption data (R2 ≥ 0.942, sum of squared error ≤ 0.105). The sorption isotherms were nonlinearly favorable (Freundlich coefficient, NF = 0.288–0.842). According to the Langmuir, Freundlich, Kargi–Ozmıhci, Koble–Corrigan, and Langmuir–Freundlich models, at pH 5 (C0 = 20 mM), KNiFC−PAN exhibited the highest maximum sorption capacity (qmL) for Cs+ among the investigated cations, wherein the primary mechanism was physical sorption. The competition between the metal ions in the binary and ternary systems reduced the respective sorption capacities. Binary and ternary sorption models, such as the ideal adsorbed solution theory (IAST) model coupled with Freundlich (IAST–Freundlich), IAST–Langmuir, and IAST–Langmuir–Freundlich models, were fitted to the experimental data; among these, the IAST–Freundlich model was the most accurate for the binary and ternary systems. The presence of sodium 4‐n‐octylbenzenesulfonate and dodecylbenzene–sulfonic acid sodium salt as anionic surfactants strongly affected the sorption capacity on KNiFC–PAN owing to increased distribution coefficients (Kd) of Cs+, Sr2+, and Co2+. Thus, KNiFC–PAN is promising for removing Cs+, Sr2+, and Co2+ from radioactive laundry wastewater.

Analysis of the Anti-corrosion Performance of Dodecyl Benzene Sulfonic Acid Sodium Salt on Various Heat-Treated Dual-Phase EN8 Steel in an Acidic Environment

This work focuses on the investigation of the corrosion inhibition of heat-treated EN8 steel in the presence of sodium salt of dodecyl benzene sulfonic acid in 0.5 M H2SO4 using the Gravimetric and Electrochemical methods. Austenitizing is performed at 700, 750, 790, and 900 °C for 2 h followed by quenching in water. When the heat-treated metal is exposed to 0.5 M H2SO4 at the temperature of 30, 40, 50, and 60 °C in the presence of dodecyl benzene sulfonic acid sodium salt inhibitor, the corrosion inhibition increased with different heat treatment conditions depending on the phase change. This work investigates the activation and adsorption isotherm parameters. The adsorption isotherms were used to estimate Gibb's free energy change. The inhibition efficiency increased with inhibitor concentration and decreased with temperatures. Out of all the isotherms examined, the Langmuir adsorption isotherm produced the best-fit results, according to the adsorption study. Corrosion and inhibition on the metal's surface were confirmed by surface characterization.

Kinetics Study of Acid Hydrolysis of Waste Nylon-6,6 using Anionic Surfactant

The depolymerization reaction of nylon-6,6 is carried out by acidic hydrolysis in the presence of various amounts of sodium dodecyl benzene sulfonic acid (SDBS) (0.02 to 0.07 g) surfactant used as a catalyst at 80 °C and at a different time interval (120 to 240 min). The maximum yield was obtained when 0.05 g SDBS was added to the reaction mixture as a catalyst and 180 min. The reaction mixture was neutralized by 5N NaOH, and the hexamethylene diamine obtained was converted into the Dibenzoyl derivative of hexamethylene diamine (DBHMD), which was filtered, dried, and weighed. The yield was found to be 87.14 %. The characterization was done by the melting point determination and FTIR spectra. The information obtained was in accordance with the literature value. This reaction has followed first-order kinetics with a rate constant of reaction 8.31×10-3 min -1. The IR recorded clearly reveals that the product obtained is pure.

Influence of Nano-Cutting Fluid in New Cutting and Forming Processes on Heat Transfer Performance of Mechanical Engineering.

In order to strengthen the thermal conductivity of green cutting fluid and the influence of nano-cutting fluid from new cutting and forming processes on heat transfer performance of mechanical engineering, a research method was proposed based on the influence of nano-cutting fluid from new cutting and forming processes on heat transfer performance of mechanical engineering. The dispersion stability, thermal conductivity, and viscosity characteristics of the nanofluid were studied, and the effects of acidification treatment time, type and concentration of carbon tube particles, surfactants, and testing conditions on the above properties were analyzed. It was found that the filling rate of T321 was about 25% when CNTs were filled, and the optimal compounding ratio of the two surfactants, sodium dodecyl benzenesulfonic acid (SDBS) and Tween-80 (TW-80), for the preparation of stable dispersed nanofluids was 3 ∶ 7. The optimum ratio of compound active agent to carbon tube is 5 ∶ 1. When CNTs were acidified for about 9 h and dispersed in sufficient and stable condition, the thermal conductivity of the base liquid was increased by 110% by the composite, and the shape factor of CNTs had the most significant effect on the thermal conductivity. It was found that the composite nanofluids had higher thermal conductivity and lower viscosity than the nanofluids prepared by ordinary CNTs. This was due to the fact that surfaces of CNTs were chemically modified during the opening and internal filling process, so that the composite had better dispersion stability in the base fluid.

Surface characterization of end-of-life reverse osmosis membranes from a full-scale advanced water reuse facility: Combined role of bioorganic materials and silicon on chemically irreversible fouling

Eight-year-old end-of-life reverse osmosis (RO) membranes from all three stages of a full-scale plant from the world's largest potable reuse facility were comprehensively characterized to discern the role of the co-existing foulants on performance decline and recovery by chemical cleaning. X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray spectra detected surficial silica foulants on all stages. High-resolution XPS and infrared spectra evidenced siloxanes among other forms of silicon foulants, which was confirmed by gas chromatography-mass spectrometry as cyclosiloxanes. Additionally, culturable bacteria were recovered, and other bioorganic foulants were identified by colorimetry, microscopy, and spectroscopy. Higher amounts of bioorganic foulants were measured in the first two stages, whereas silica fouling was more significant in the first- and third-stage elements. Chemical cleaning with either sodium tripolyphosphate – sodium dodecylbenzenesulfonic acid mixture, sodium dodecyl sulfate – sodium hydroxide mixture, or hydrochloric acid did not completely restore membrane permeability demonstrating the need for membrane replacement. Siliceous foulants were most intractable to all chemical cleaning methods evaluated (including sodium hydroxide) and were the dominant cause of chemically-irreversible fouling leading to the membranes' end-of-life. Our results suggest that incorporating silicon pretreatment could improve RO performance and extend membrane life span during municipal potable reuse.

Preparation and comparative study of anticorrosion nanocomposites of polyaniline/graphene oxide/clay coating

Abstract In this study, novel anticorrosion coatings including doped polyaniline, reduced graphene oxide (RGO) and modified clay sodium montmorillonite (Na-MMT) were synthesized. The nanocomposite particles were coated on carbon steel after optimal mixing and dispersion in epoxy resin. In order to increase the dispersibility and increase the functional groups between the graphene plates, the initial graphene oxide nanoparticles were re-oxidized and finally reduced to have a better dispersibility in the composite environment. Sodium dodecyl benzene sulfonic acid (SDBS) was used as a secondary dopant and surfactant. Synthesized nanocomposites were characterized using Fourier-transform infrared spectroscopy (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). Furthermore, Open Circuit Potential (OCP), Electrochemical Impedance Spectroscopy (EIS), Fourier-transform infrared spectroscopy (FFT), and salt spray test were used to investigate the electrochemical and anticorrosion behavior of the synthesized composite. The results showed that the initiative of adding certain ratios of RGO and Na-MMT to the polyaniline polymer significantly increased the anticorrosion properties of the coating. It was also found that at the same part ratios, the anticorrosion property of RGO is higher than the anticorrosion property of Na-MMT. According to the Tafel test, the corrosion current of the synthesized nanocomposite was 0.065 μA cm−2, which was lower than the corrosion current of other samples and shows the superiority of the anticorrosion property of this sample. Also, after 720 h of Salt spray test (In 3.5% wt NaCl), a very high and desirable durability of this sample (Sample a) has been observed.

Dispersion of electrically conductive carbon fibres in self-compacting concrete using chemical and mechanical dispersing techniques

In this study, the influence of the mechanical de-agglomeration of carbon fibres in the mixing water blended with methylcellulose and sodium dodecyl benzene sulfonic acid salt (SDBS) for dispersion of carbon fibres in self-compacting concrete (SCC) was studied. The mechanical energy needed for de-agglomeration was provided by churning the carbon fibres in the treated water using mechanical churner at varying speed of 1440RPM to 23000RPM. The degree of dispersion was evaluated by investigating the variations in rheological, electro-mechanical and microstructure properties of carbon-fibre reinforced SCC. It was observed that the mechanical churner at lower speed (1440RPM to 11000RPM) in the surfactant blended water successfully deagglomerated the carbon fibre filament threads without disturbing their individual morphology that resulted in better distribution of fibres in the concrete. Microstructure images further confirmed the role of mechanical mixing in improving the dispersion of fibres.

Dispersion of electrically conductive carbon fibres in self-compacting concrete using chemical and mechanical dispersing techniques

In this study, the influence of the mechanical de-agglomeration of carbon fibres in the mixing water blended with methylcellulose and sodium dodecyl benzene sulfonic acid salt (SDBS) for dispersion of carbon fibres in self-compacting concrete (SCC) was studied. The mechanical energy needed for de-agglomeration was provided by churning the carbon fibres in the treated water using mechanical churner at varying speed of 1440RPM to 23000RPM. The degree of dispersion was evaluated by investigating the variations in rheological, electro-mechanical and microstructure properties of carbon-fibre reinforced SCC. It was observed that the mechanical churner at lower speed (1440RPM to 11000RPM) in the surfactant blended water successfully deagglomerated the carbon fibre filament threads without disturbing their individual morphology that resulted in better distribution of fibres in the concrete. Microstructure images further confirmed the role of mechanical mixing in improving the dispersion of fibres.

Synthesis and Characterization of Novel Poly (VAC-VeoVa-HFMA-BZMA) Latex via Semicontinuous Seeded Emulsion Polymerization

The novel poly (VAC-VeoVa-HFMA-BZMA) latex was successfully prepared via semicontinuous seeded emulsion polymerization which vinyl acetate (VAc) and vinyl ester of neodecanoic acid (VeoVa10) were main monomer, hexafluorobutyl methacrylate (HFMA) and benzyl methacrylate (BZMA) were used as functional monomer. Dodecyl benzene sulfonic acid sodium (SDBS), octylphenol polyoxyethylene ether (OP-10) and potassium persulfate (KPS) were used to be mixed emulsifier and initiator, respectively. The structure of the resultant latex is determined by Fourier transform infrared spectroscopy spectrum (FTIR). The thermal performances of latex film are studied via the thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The average particle size of the latex is characterized by the dynamic light scattering(DLS).Water contact angle (WCA) is used to test the wetting property of the novel poly (VAC-VeoVa-HFMA-BZMA) latex film. The condition of synthesizing the latex was studied in detail. The optimum condition of preparing the novel latex is that the amount of emulsifier is 8.0% (wt %) and the mass ratio of SDBS to OP-10 is 2 : 1 and the mass ratio of main monomer VAc to VeoVa10 is 3 : 1. The amount of initiator is 0.8% and the amounts of HFMA and BZMA are 6.0 and 8.0% (wt %), respectively. Results indicate that the water resistance of the latex film and thermal stability are improved when the fluorine and BZMA monomers are added.

Chemical sensing platform for the Zn+2 ions based on poly(o-anisidine-co-methyl anthranilate) copolymer composites and their environmental remediation in real samples.

A novel nanostructure of poly(o-anisidine-co-methyl anthranilate) (poly(Ani-Co-MA) copolymer has been synthesized by chemical oxidative in situ polymerization technique with equal molar proportion of monomers in the presence of sodium dodecylbenzene sulfonic acid (SDBS) surfactant. The synthesized copolymers were characterized by scanning electron microscope (SEM) and X-ray crystallography (XRD), Fourier transform infrared (FTIR), UV-Vis, thermo-gravimetric analysis (TGA), and simultaneous X-ray photoelectron spectroscopy (XPS) study. The ultraviolet visible spectrum shows the π to π∗ transition and n to π∗ transition. XRD diffraction pattern confirms the amorphous nature of poly(Ani-Co-MA)-SDBS composites. The scanning electron microscope image shows the morphology of the copolymer matrix. For the selective detection of Zn+2 cation in neutral phosphate buffer, it was fabricated Zn+2 cation sensor based on glassy carbon electrode (GCE) coated with poly(Ani-co-MA)-SDBS composites as a thin layer with conducting coating binders. The proposed cation sensor has been found to exhibit the inertness in air and chemical environment, long-term stability with good sensitivity, a broad linear dynamic range practically, a reliable reproducibility, short response time, and high electrochemical activity. The sensitivity (0.3560μAμM-1cm-2) of Zn+2 cation sensor has been calculated from the slope of the calibration curve. The linearity of the calibration curve is found over the linear dynamic range (LDR) 0.1nM~0.01M, and detection limit (DL) is 27.0±1.35pM at the signal to noise ratio of 3. This novel effort may be considered quite reliable and effective to detect Zn+2 cation in environmental and biomedical sectors on a broad scale. Simultaneously, SDBS doped poly(o-anisidine-co-methyl anthranilate) copolymer composites were measured against medically important organisms Escherichia coli. E. ludwigi, and Bacillus subtilis. Graphical abstract ᅟ.

Thermoelectric properties and intrinsic conduction processes in DBSA and NaSIPA doped polyanilines

Seeking to gain fundamental understanding of the thermoelectric (TE) behavior of polyanilines (PANIs), structure- property relationships of PANI nanorods, doped with dodecylbenzenesulfonic acid (DBSA) and 5-sulfoisophtalic acid sodium salt (NaSIPA), and prepared by an indirect synthetic route, are discussed in terms of the contribution of the acid concentrations on the thermoelectric properties.The synergistic combination of high doping level and layer structure, accounts for the moderately high electrical conductivities (σ) and low constant Seebeck coefficients (α) of PANI-DBSA. Conversely, the poor doping ability of NaSIPA and low crystallinity degree explain the low electrical conductivities along with significant increases in Seebeck coefficient values. In relation to conduction mechanisms, PANI-DBSA shows a hopping behavior with a carrier concentration of c≈0.49 (hole type), while PANI-NaSIPA displays a diffusive regime, characteristic of degenerate metallic semiconductors, with an estimated charge carrier density of n ≈3 × 1021 e/cm3.

Doped polypyrrole with good solubility and film forming properties suitable for device applications

Polypyrrole (PPy) soluble in various organic solvents was synthesized by chemical oxidative polymerization with ammonium persulfate as the oxidant and di (2-ethylhexyl) sulfosuccinic acid sodium salt (NaDEHS) and dodecylbenzene sulfonic acid sodium salt (NaDBSA) as dopants. The solubility of the PPy/NaDEHS/NaDBSA samples in various solvents was investigated. PPy-NaDEHS sample shows high solubility and the polymer film show conductivity of the order of 10-1 S/cm compared to PPY-NaDBSA. The FTIR spectra of the samples show the presence of all the characteristic absorption peaks of polypyrrole and the dopants were found to be incorporated into polypyrrole. Thermogravemetric analysis shows high PPy-NaDEHS is more thermally stable compared to PPY-NaDBSA. XRD patterns of the samples show partially crystalline nature. UV visible absorption spectroscopic studies of the homogeneous solutions of the doped PPy samples prepared from the various solvents show different absorption behaviour in the near IR region depending on the polarity of the solvent.

TeO2–decorated W18O49 nanorods with highly enhanced gas-sensing performance towards nitrogen dioxide

Surface functionalization is an effective approach for improving the gas-sensing capabilities of one-dimensional (1D) metal oxides. In this work, tellurium dioxide nanoparticles–decorated tungsten oxide nanorods (TeO2 NPs@W18O49 nanorods) were prepared via a facile two-step process, i.e. solvothermal synthesis of W18O49 nanorods followed by hydrolysis deposition of TeO2 NPs, for gas-sensing applications. In the TeO2 decoration process, sodium dodecyl benzene sulfonic acid was introduced as surfactant to assure formation and attachment of highly discrete, tiny TeO2 NPs on whole surface of nanorods. The microstructures of the decorated nanorods were characterized, and the effect of TeO2 decoration on the gas-sensing characteristics of W18O49 nanorods was investigated. It is found that TeO2 decoration reduces the optimal operating temperature of W18O49 nanorods-based sensor from 200 to 150 °C. The W18O49 nanorods decorated with discrete TeO2 NPs display about four-fold enhancement in gas response to 0.1–1 ppm NO2 at 150 °C compared to pure W18O49 nanorods. The underlying mechanism for the enhanced response of the decorated sensor was demonstrated based on an electronic sensitization-related conductance effect model.

Recovery of phenolic compounds from wastewaters through micellar enhanced ultrafiltration

In this research work, the efficiency of Micellar Enhanced Ultrafiltration (MEUF) was evaluated for recovery of polyphenols from aqueous solution, using three surfactants, namely Esterquat, Dodecylbenzenesulfonic acid sodium (DBSS) and Lutensol AO 7 (cationic, anionic and non-ionic surfactants, respectively). Firstly, the critical micellar concentration (CMC) was experimentally determined for each surfactant. CMC values of DBSS was almost 4 orders of magnitude higher than Esterquat and around 200 orders higher than Lutensol A07, indicating the high efficiency of micellization for Esterquat and Lutensol A07. On the other hand, the effect on the polyphenols retention percentage of several factors in the practical application of MEUF was investigated including transmembrane pressure, nature of surfactant, feed surfactant concentration, mole fraction of non-ionic surfactant as well as initial pH value. Results showed that the permeate flux increased with increasing transmembrane pressure. It was concluded that the highest retention efficiency was obtained for the cationic surfactant during the first filtration minutes (higher than 90%). Moreover, the surfactant concentration of 5 CMC gives the best rejection percentage. There was no significant improvement with addition of non-ionic surfactant. Regarding the influence of initial pH, polyphenols rejection percentage slightly increased with an increase in the pH up to a value equal to 3 (from 93 to 95%), but higher pH values resulted in lower polyphenols retention percentage. The results demonstrate the high efficiency of MEUF system under optimal conditions for the treatment of polyphenols-contaminated wastewaters and for the concentration and recovery of these phenolic compounds.

Core-shell structure of polypyrrole grown on W18O49 nanorods for high performance gas sensor operating at room temperature

In this work, uniform core-shell structure of polypyrrole wrapped on tungsten oxide nanorods (PPy@W18O49 core-shell nanorods) were synthesized via a two-step process for gas-sensing applications. The core-nanorods of W18O49 were first grown by solvothermal method with tungsten hexachloride (WCl6) as precursor. The PPy-shell layer was then formed uniformly on the solvothermally synthesized W18O49 nanorods by in-situ chemical polymerization of pyrrole monomer (Py), with sodium dodecyl benzene sulfonic acid (DBSA) as dopant and ammonium persulfate (APS) as oxidant. High dispersion of Py achieving in ethanol is proved to be crucial to form the uniform PPy-shell layer, and the layer thickness of PPy-shell is highly controlled by adjusting the Py concentration in polymeric solution. The morphology and structure of the nanocomposite were characterized systematically; it shows that the composite exhibits perfect core-shell structure of one-dimensional (1D) nanorods with average diameter of around 70–90 nm. The NH3-sensing properties of the sensors based on the PPy@W18O49 core-shell nanorods were investigated at operating temperature of 15–130 °C over NH3 concentration ranging from 1 to 200 ppm. The response magnitude of the PPy@W18O49 sensor can be affected seriously by temperature fluctuation, even in room temperature range (15–30 °C), and meanwhile, a temperature-dependent p-n response characteristic reversal is observed for the heteronanorods sensor. At much low room temperature of 15 °C, the present PPy@W18O49 nanorods show quick and sensitive response to NH3 gas mainly due to the ultrathin, uniform PPy shell and the special heterojunction effect between p-type PPy and n-type W18O49. The underlying gas-sensing mechanism is analyzed.

Polyacrylonitrile/polyaniline composite nanofiber webs with electrostatic discharge properties

In this study, composite nanofibers of polyacrylonitrile (PAN) and polyaniline (PANI) were successfully produced by electrospinning technique and the effects of different dopants such as camphorsulfonic acid (CSA), dodecylbenzene sulfonic acid (DBSA) and dodecylbenzene sulfonic acid sodium salt (DBSANa+), and different solvents such as dimethylsulfoxide (DMSO) and N, N′-dimethylformamide (DMF) on the properties of PAN/PANI composite nanofiber webs have been investigated. It has been observed that nanofibers produced from DMSO generally had larger fiber diameters and higher breaking strength than nanofibers produced from DMF. CSA could dope better than DBSA(iso) and DBSANa+. CSA resulted in the highest conductivity when DMSO was used while it resulted in lower conductivity in DMF. The insulator PAN became a semiconductive material with the incorporation of CSA-doped PANI. The highest electrical conductivity obtained was 10−6 S/cm which is in the range suitable for electrostatic discharge applications.

Polyacrylonitrile/polyaniline composite nano/microfiber webs produced by different dopants and solvents

In the present study, the effects of different dopants such as camphorsulfonic acid (CSA), dodecylbenzene sulfonic acid (DBSA) (70 wt% in isopropanol), and dodecylbenzene sulfonic acid sodium salt (DBSANa+), and different solvents such as N-methylpyrrolidone (NMP), and N,N-dimethylformamide (DMF) on the structure and properties of polyacrylonitrile (PAN)/polyaniline (PANI) composite nano/microfiber web produced by the electrospinning technique have been investigated and compared to each other. It has been observed that the nano/microfibers produced from NMP solvent generally had larger fiber diameters than the nano/microfibers produced from DMF, while the use of DBSANa+ resulted in the formation of larger diameters in comparison to other dopants. The use of NMP as the solvent resulted in higher breaking stress values for the reference samples and the composite samples, which contained CSA-doped PANI while the samples that contained DBSA(iso) and DBSANa+-doped PANI showed lower breaking stress values when electrospun from NMP. While the solutions prepared using DBSANa+ showed higher solution conductivities, the use of NMP as the solvent resulted in lower solution conductivity values. Higher conductivity values were obtained with CSA in NMP and with DBSA(iso) in DMF. The conductivity values of the composite nano/microfiber webs were around 10−8 and 10−9 S/cm, which is the range for antistatic materials instead of insulator materials as pure PAN.

Potentiometric detection of AFFFs based on MIP

Potentiometric detection of fluoro-surfactants formulated in aqueous film-forming foams (AFFFs) is demonstrated using molecular imprinted polymer (MIP) formed on pencil lead. We introduce an ingredient of methylene blue (MB) into the polymer matrix of polypyrrole (PPY) to increase the selectivity due to the formation of ion-pairs of AFFF-MB. Fluoro-surfactants including perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS) and 1H, 1H, 2H, 2H-perfluorooctanesulfonic acid (6:2FTS) are specifically detected in the range of 10 μM–10 mM with the limit-of-detection (LOD) down to ∼100 nM (or ∼41 ppb for PFOA). The interference caused by anionic surfactants of sodium dodecyl sulphate (SDS) and dodecylbenzenesulfonic acid sodium (SDBS) is tested and the negative response is discussed.

Dopant ve Solventlerin Poliakrilonitril / Polianilin Kompozit Nanoliflerinin Morfolojisi, İletkenliği ve Mekanik Özellikleri Üzerine Etkileri

In this study, the effects of different dopants such as camphorsulfonic acid (CSA), dodecylbenzene sulfonic acid sodium salt (DBSANa+), different solvents such as N,N’-dimethylformamide (DMF), and dimethyl sulfoxide (DMSO) and different mixing processes such as magnetic mixing and mechanical mixing on the morphology, conductivity and mechanical properties of PAN/PANi composite nanofibers are investigated. It has been seen that composite nanofibers had the smallest fiber diameter, lowest conductivity and lowest mechanical properties when CSA (dopant) and DMF (solvent) are used. However, the composite nanofibers in which the polyaniline is doped with CSA in DMSO (solvent) had better conductivity and mechanical properties, besides having thicker diameters. When the mixing effects compared, mechanical mixing process resulted in higher mechanical properties of nanofibers compared to magnetic mixing process, while there was not much difference between fiber diameter and conductivity values.