Effect Of PANI Research Articles

Development of novel hybrid nanomaterials with potential application in bone/dental tissue engineering: design, fabrication and characterization enriched-SAPO-34/CS/PANI scaffold

ABSTRACT Fe-Ca-SAPO-34/CS/PANI, a novel hybrid bio-composite scaffold with potential application in dental tissue engineering, was prepared by freeze drying technique. The scaffold was characterized using FT-IR and SEM methods. The effects of PANI on the physicochemical properties of the Fe-Ca-SAPO-34/CS scaffold were investigated, including changes in swelling ratio, mechanical behavior, density, porosity, biodegradation, and biomineralization. Compared to the Fe-Ca-SAPO-34/CS scaffold, adding PANI decreased the pore size, porosity, swelling ratio, and biodegradation, while increasing the mechanical strength and biomineralization. Cell viability, cytotoxicity, and adhesion of human dental pulp stem cells (hDPSCs) on the scaffolds were investigated by MTT assay and SEM. The Fe-Ca-SAPO-34/CS/PANI scaffold promoted hDPSC proliferation and osteogenic differentiation compared to the Fe-Ca-SAPO-34/CS scaffold. Alizarin red staining, alkaline phosphatase activity, and qRT-PCR results revealed that Fe-Ca-SAPO-34/CS/PANI triggered osteoblast/odontoblast differentiation in hDPSCs through the up-regulation of osteogenic marker genes BGLAP, RUNX2, and SPARC. The significance of this study lies in developing a novel scaffold that synergistically combines the beneficial properties of Fe-Ca-SAPO-34, chitosan, and PANI to create an optimized microenvironment for dental tissue regeneration. These findings highlight the potential of the Fe-Ca-SAPO-34/CS/PANI scaffold as a promising biomaterial for dental tissue engineering applications, paving the way for future research and clinical translation in regenerative dentistry.

Photocatalytic degradation of ciprofloxacin drug utilizing novel PVDF/polyaniline/ lanthanum strontium manganate@Ag composites

Poly (vinylidene fluoride) (PVDF) is the first-choice ferroelectric support or membrane material. The lanthanum strontium manganite (LSMO) is a well-known electrode material in the class of the solid oxide fuel cell (SOFC) materials. A set of four polymer composites PVDF-LSMO-PANI(5.0 wt%) with different amount of silver doping were fabricated with the silver nitrate and reducing agent. The characterization of these four novel PVDF based composites were characterized by the XRD, FTIR, SEM, UV-Visible DRS. The present communication highlights: (I) the effect of PANI in the PVDF-LSMO-PANI (PLP) composites towards the photocatalytic degradation of ciprofloxacin drug. (II) the effect of Ag doping in the Ag-PVDF-LSMO-PANI (Ag-PLP) composites towards the photocatalytic degradation of ciprofloxacin drug. It is observed that the incorporation of PANI in PVDF-LSMO and Ag in PVDF-LSMO-PANI polymer ceramic composites showed enhanced photocatalytic degradation of ciprofloxacin in the irradiation of visible radiation. The plausible separation of photo-generated e- hole pairs (e- and h+) carried on by charge migration kind of mechanism is being studied here to understand the improved photocatalytic activity of Ag-PVDF-LSMO-PANI composites.

Effect of PANI on the structural, optical and electrical properties of PMMA/PEO blended polymers loaded with CuCo2O4/MnS nanocomposite

Effect of PANI on the structural, optical and electrical properties of PMMA/PEO blended polymers loaded with CuCo2O4/MnS nanocomposite

Conducting Polyacrylamide–Polyaniline Polymers as Water‐Soluble Binder in LiFePO4 Cathode for Lithium‐Ion Batteries

A novel water‐soluble cationic polyacrylamide/polyaniline (CPNi) conductive and mechanical robust binder is designed and fabricated. PANi units possessed by CPNi can provide electrical conductivity for this system, and the crosslinking network between polyacrylamide and polyaniline can form via chemical bonds and its intermolecular hydrogen bonds. The effect of PANi is investigated via the electrochemical behaviors and mechanical properties. The CPNi6 sample could balance electrochemical and mechanical properties. It exhibits a superior discharge capacity of 120 mAh g−1 at 200th cycle under the current density of 1C and an excellent discharge capacity of 118 mAh g−1 at 5C‐rate.

Study on properties of hydrogenated nitrile butadiene rubber filled with polyaniline compound silica

AbstractPolyaniline was synthesized by chemical oxidation polymerization, and polyaniline‐silica (PANI‐SiO2) nanocomposites were prepared by precipitation method. A reinforced PANI‐SiO2/HNBR was obtained by filling the PANI‐SiO2 composites into hydrogenated nitrile rubber (HNBR). The amino cations contained in acid‐doped PANI can electrostatically attract SiO32−, so that SiO2 can grow directly on the surface of PANI, thus reducing the agglomeration of silica and improving the mechanical properties of reinforced rubber. The effect of PANI and PANI‐SiO2 composites on mechanical properties of hydrogenated nitrile butadiene rubber was studied. The results show that PANI improves the dispersion of SiO2 in HNBR. When the PANI‐SiO2 composite (PANI content of 2%) in PANI‐SiO2/HNBR is 30 phr, the filler network is the weakest, and the dispersion of filler is the best in rubber, the maximum tensile strength of PANI‐SiO2/HNBR is 30.31 MPa, which is 1.87 times that of SiO2/HNBR, the tear strength is 27.7 MPa, which is 129.4% of that of SiO2 reinforced packing with the same number of components. The hardness and elongation at break both increase. In addition, the permanent tensile deformation of PANI‐SiO2/HNBR is also reduced.

Cyclic Voltametry Study of PANI/ZnOUrease Based Biosensor with Stainless Steel Electrode as Transducer

The electrochemical characteristic Cyclic Voltametry (CV) was studied for ElectrodepositedPolyaniline (PANI)/ZnOnanocomposite onto a stainless steel transducer. The Cyclic Voltametrywas studied during electrodeposition of PANI/ZnO on the stainless steel electrode.Good cyclic voltammogram for 15 wt% composition was observed as compared to others. The PANI/ZnO film also offers a more symmetrical voltammogram, with oxidation starting at a lower potential (0.05 to 0.08 V) compared to pure PANI, indicating that the presence of the ZnO promotes the electron-transfer of the oxidation process.Cyclic Voltametry of PANI/ZnO/Urease electrode shows the oxidation potential peaks occurs in CV of ZnO-PANI 15% film depicts the oxidized potential at around 0.2V, which is at higher potential as compared to other lower weight %, indicating larger surface area and larger potential window as compared to others. The magnitude of peak current gets increased with increasing concentration of ZnO, which ensure quick response time of the sensor. The CV of PANI/ZnO/Urease in potential window of -0.1 to 0.1V shows resistive effect of PANI. Also, the cyclic voltammogram of PANI/ZnO/Urease 15% shows more ohmic behavior as compared to other compositions and PANI.

Effect of PANI–AC Composite on Electrochemical Synthesis of Hydrogen Peroxide by Alkaline H2–O2 Fuel Cell Reactor

Effect of PANI–AC Composite on Electrochemical Synthesis of Hydrogen Peroxide by Alkaline H2–O2 Fuel Cell Reactor

Gold Microstructures/Polyaniline/Reduced Graphene Oxide/Prussian Blue Composite as Stable Redox Matrix for Label-free Electrochemical Immunoassay of α-Fetoprotein.

Sensitivity amplification strategies in label-free electrochemical immunosensors are mainly limited by redox molecules leaking and degradation of electrical conductivity caused by layers of decoration. Herein, a relatively stable and sensitive label-free electrochemical immunosensor based on a hierarchically flower-like gold microstructures/polyaniline/reduced graphene oxide/prussian blue (HFG/PANI/rGO/PB) composite modified electrode was stepwise fabricated for determination of α-fetoprotein (AFP). In this process, the effect of PANI and rGO on the proposed immunosensor was studied. In detail, PANI/rGO due to the unique electrochemical properties can effectively prevent PB leakage and form a stable sensing platform, which causes sensitive responsiveness and thus a more satisfied detection limit. Meanwhile, the HFG with good biological compatibility can effectively immobilize plenty of antibodies. Under optimal conditions, the HFG/PANI/rGO/PB modified immunosensor exhibited an excellent linearity (0.01 - 30 ng/mL) and a low detection limit (0.003 ng/mL) (S/N = 3), suitable specificity as well as stability and reproducibility towards AFP. The present work offered a promising platform for clinical hepatocellular carcinoma diagnostics.

Utilization of Bi2WO6-encapsulated polyaniline-based redox reactions for the efficient detoxification of organic pollutants

Water contamination by toxic organic pollutants remains a serious public health problem for humans due to their long-lasting effects, so attention on specific methods and technologies to remove organic pollutants from waste water is desired. Numerous methods and photocatalysts are reported for the degradation of organic pollutants. In this work, BiVO4/Bi2WO6@polyaniline nanostructures were prepared successfully through facile wet chemical co-precipitation method and in sequence deposited over the BiVO4 surface for the first time. The surface morphology of synthesized photocatalysts was observed by scanning electron microscopy (SEM) and structural properties were investigated by X-ray diffraction (XRD). The addition of polyaniline and Bi2WO6 into BiVO4 shifted the characteristic peaks of BiVO4 towards lower 2θ angle which is clear evidence of doping of these elements into BiVO4 structure under these conditions. In addition, the crystallite size of BiVO4 was also decreased due to incorporation of doping elements. Compared with pure BiVO4, hybrid photocatalysts exhibit higher photocatalytic activity and stability for degradation of phenol and ciprofloxacin under visible-light irradiation. When the effect of PANI in BiVO4–Bi2WO6 was examined, 1% PANI/BiVO4–Bi2WO6 heterojunction exhibited the highest photocatalytic performance. The degradation efficiency for phenol was 98% and 99% for ciprofloxacin at 90 min and this value was about seven times and three times higher than as compared to pure BiVO4 and BiVO4–Bi2WO6, respectively. The obviously improved photocatalytic performance of BiVO4–Bi2WO6/PANI composite was mainly ascribed to unique hierarchical structures, harvesting extended region of visible light, higher surface area, higher crystallinity, electronic transmission and narrow band gap, which significantly enriched the adsorption capacity and accordingly facilitated the separation of photogenerated charge carriers. The current findings may provide new insights into the employment of hybrid photocatalysts and improving the photocatalytic activity to address energy and environmental issues.

The effect of PANI and MWCNT on magnetic and photocatalytic properties of substituted barium hexaferrite nanocomposites

Methylene blue is an instance of dyestuff that has considered as a harmful environmental pollutant and various studies have been taken for removing it from wastewaters during last years. At the present article, nanocrystalline M-type BaZn0.2Co0.2Sn0.4Fe11.2O19 hexagonal ferrite was prepared by sol-gel self-propagating combustion method. The synthesized sample decorated on modified multi-wall carbon nanotubes. For synthsise of BaZn0.2Co0.2Sn0.4Fe11.2O19/polyaniline, in-situ polymerization took place. The phase analyzing, morphology and magnetic properties of attained composites have been studied by X-ray diffractometer (XRD), Field Emission Scanning Electron Microscopy (FESEM), Fourier Transform Infrared (FTIR) and Vibrating Sample Magnetometer (VSM) analyzes. The main purpose was photocatalytic degradation of MB by BaZn0.2Co0.2Sn0.4Fe11.2O19 (BZCS0.2) and its derivatives BaZn0.2Co0.2Sn0.4Fe11.2O19/MWCNT and BaZn0.2Co0.2Sn0.4Fe11.2O19/PANI composites under UV–visible irradiation. The results show that BaZn0.2Co0.2Sn0.4Fe11.2O19 has high magnetic saturation that makes it suitable for magnetic separation. On the other hand, UV–visible optical spectroscopy confirmed that BaZn0.2Co0.2Sn0.4Fe11.2O19 nanoparticles and its nanocomposites are capable of methylene blue (MB) degradation. The color of MB dispersion changed from deep blue to pale blue at the first 10 min of UV irradiation, and after 60 min BZCS0.2 shows photocatalytic degradation about 64%, while BaZn0.2Co0.2Sn0.4Fe11.2O19/PANI and BaZn0.2Co0.2Sn0.4Fe11.2O19/MWCNT degradation in 60 min is 80% and 87%, respectively. The reusability of samples repeated and represented that BaZn0.2Co0.2Sn0.4Fe11.2O19/MWCNT after three times had 80% photodegradation ability. So, based on the results, BaZn0.2Co0.2Sn0.4Fe11.2O19/MWCNT because of the extended surface of MWCNT, shows the best ability of MB degradation under UV–visible. Furthermore, Recycling experiment proves it as a potential practical application in MB removing from water.

Enhanced ultraviolet fluorescence in surface modified ZnO nanostructures: Effect of PANI

ZnO:polyaniline nanocomposite (ZnO:PANI) films were prepared and their steady state fluorescence and time resolved photoluminescence properties were discussed. X-ray diffraction and infrared spectroscopy analyses confirmed the interaction and formation of ZnO:PANI composite films. Optical absorption spectrum of pure PANI showed two bands at 325 and 625nm which were ascribed to π→π∗ transition in the benzoid and exciton formation in the quinoid rings, respectively. Pure ZnO nanoparticles exhibited a band at 369nm was due to their exciton absorption and the composite films showed a broad band in the visible region and small intensity band at the UV region. Fluorescence spectra showed that the ultra violet emission of ZnO was enhanced about tenfold due to the electron transfer from PANI to ZnO nanoparticles and the suppression of visible emission was attributed to the surface passivation effect. The transfer of electron from PANI to ZnO and its decay dynamics were experimentally analyzed through time resolved fluorescence measurements.

Polyaniline-Pt and polypyrrole-Pt nanocomposites: Effect of supporting type and morphology on the nanoparticles size and distribution

The size and the distribution of platinum nanoparticles on the polyaniline-Pt (PANI-Pt) and polypyrrole-Pt (PPy-Pt) nanocomposites are extremely sensitive to the polymer matrix morphology. This is observed when the polymer matrix morphology was changed from nanofibers to nanotubes. TEM results showed platinum nanoparticles with size diameter as low as 2nm in the case of polpyrrole nanofiber and polyaniline nanofiber matrices. In addition, FTIR and UV–vis results showed that polyaniline matrix with different morphologies, nanofibers and nanotubes, presented different chemical structures, which resulted in a different size and distribution of the platinum nanoparticles, as it was observed from the SEM, platinum X-ray mapping and TEM results. The DSC thermal analysis results showed that the presence of platinum nanoparticles in the polymer matrix resulted in a greater thermal stability when compared to the polymer matrix. It was the first time that the effect of PANI and PPy morphology on the platinum dispersion and distribution is demonstrated.

Effect of polyaniline as a surface modifier of TiO2 nanoparticles on the properties of polyvinyl chloride/TiO2 nanocomposites

Surface of TiO2 nanoparticles was modified with the in situ chemical oxidative polymerization of aniline. Polyaniline modified TiO2 nanoparticles (PANI-TiO2) were characterized with the FT-IR, XRD, SEM and TEM techniques. Results confirmed that PANI was grafted successfully on the surface of TiO2 nanoparticles, therefore agglomeration of nanoparticles decreased dramatically. Polyvinyl chloride nanocomposites filled with 1 wt%-5 wt% of PANI-TiO2 and TiO2 nanoparticles were prepared via the solution blending method. PVC nanocomposites were analyzed with FT-IR, XRD, SEM, TG/DTA, DSC and tensile test techniques. Effect of PANI as surface modifier of nanoparticles was discussed according to the final properties of PVC nanocomposites. Results demonstrated that deposition of PANI on the surface of TiO2 nanoparticles improved the interfacial adhesion between the constituents of nanocomposites, which resulted in better dispersion of nanoparticles in the PVC matrix. Also PVC/PANI-TiO2 nanocomposites showed higher thermal resistance, tensile strength and Young’s modulus compared to those of unfilled PVC and PVC/TiO2 nanocomposites.

Preparation of Conductive PANI/Modified CIP Composites via <i>In Situ</i> Polymerization

A conductive PANI/CIP composite with core/shell structure was prepared by in-situ polymerization of Aniline(Ani). In order to reduce the acid corrosion on carbonyl iron powders(CIP) in polymerization of Ani, the surface of CIP was modified by (3-aminopropyl)-triethoxysilane (APTES) before the polymerization. The influences of modification on Ani polymerization, the morphology changes of core/shell structure and conductivity of PANI/CIP composites were characterised and discussed. The results show that after CIP modified by APTES, the reaction process of Ani polymerization is more stable; the PANI particles on the surface of CIP are smaller, and more uniform and more compact; The coating effect of PANI on the surface of CIP is significantly improved; The composite conductivity changes slightly with the modification.