Techno India

Zirconium nitride (ZrN), 3-aminopropylmethyldiethoxysilane (AMDES), and graphene oxide (GO) were incorporated into polyurethane (PU) coatings to improve their anticorrosion and mech. properties.SEM with energy-dispersive x-ray spectroscopy (SEM/EDX), transmission electron microscopy (TEM), TGA, XPS, and XRD techniques were employed to examine the structural and morphol. behaviors.The anticorrosive and adhesive capacities of the PU-GO/AMDES-ZrN nanocomposite were verified using mech. testing and electrochem. methods.Impedance studies confirm that the corrosion protection performance of PU-GO/AMDES-ZrN was determined to be much greater (2.523E10 ω cm²) than plain polymer.The results of the scanning electrochem. microscopy (SECM) investigation demonstrate that 0.6 is the optimal weight proportion for GO/AMDES-ZrN, which is used in subsequent studies.SECM Studies demonstrated that the metal ions that dissolve in the PU-GO/AMDES-ZrN nanocomposite are under control.The examination of material shape, phase structure, and composition was conducted by the use of SEM/EDX and XRD techniques.A compact film with enhanced mech. properties was developed by GO/AMDES-ZrN and polyurethane establishing a strong bond.It demonstrates exceptional hydrophobic properties with water contact angle (WCA) of 154°.The PU-GO/AMDES-ZrN film displayed the enhanced adhesive strength (27.3 MPa).It is consequently possible to utilize the PU-GO/AMDES-ZrN as a prospective coating material in the aerospace industries.

The aim of this research is to develop thermally reduced corn stover biochar and combined it with the satin weaved sisal-reinforced vinyl ester composites.This investigation focus on mech., wear, DMA, fatigue, and hydrophobic properties of this composite, characterized according to ASTM standardsComposites are made after silane surface treatment on reinforcements and fabricated by hand layup process.Results show that the composite with the 5.0 volume% biochar had the highest values of mech. properties, which were 134 MPa, 4372 MPa, and 4.74 J for tensile strength, flexural strength, and Izod impact, resp.But further increased in biochar up to 5.0 volume% shows the reduction in mech. properties.On the other hand, the composite designation VS3 was discovered to have the maximum storage modulus and lowest loss factor with inclusion of 5.0 volume% of biochar particles as well as it shows the better wear characteristics of about 0.28 coefficient of friction and 0.009mm³/Nm sp. wear rate.However, maximum fatigue life counts of about 28,813 were observed by addition of 3.0 volume% of biochar.The composite material designated VS3 exhibits the highest recorded contact angle, which is around 71°, indicating that it is hydrophobic in nature.SEM fractog. demonstrates better fiber-to-matrix adhesion as a result of surface treatment on reinforcing materials.Furthermore, such composites could be used in industrial and domestic applications.

A simple single step one pot multicomponent reaction was performed to synthesize N-(tert-butyl)-2-(furan-2-yl)imidazo[1,2-a]pyridine-3-amine (TBFIPA). The synthesized TBFIPA was subjected to library of cations to study its ability for selective and sensitive detection of specific metal ions. Selective detection of chromium ions by TBFIPA were found from the significant hypsochromic shift (335 nm → 285 nm) in the UV-Visible spectra. The fluorescent TBFIPA displays complete quenching of fluorescence under UV lamp (365 nm) only in the presence of chromium without the interference of common metal ions. Binding constant (k_a) obtained from Benesi-Hildebrand plot is 0.21 × 10⁵ M^-1, limit of detection (LOD) and limit of quantification (LOQ) of TBFIPA toward Cr³⁺ ions are 4.70 × 10^-7 M and 1.56 × 10^-7 M, respectively. The mechanism proposed during complex formation were supported by stoichiometric Job continuous variation plot, ¹H NMR titration and ESI-MS spectroscopic data. All the experimental confirmation for complex formation were corroborated with theoretical DFT studies optimized using RB3LYP/6-31G(d) basis set. The selectivity and sensitivity of TBFIPA toward Cr³⁺ ions are found suitable to design a user-friendly silica based portable test kit. Alongside, TBFIPA was successfully utilized for imaging onion epidermal cells. Furthermore, the results obtained for biological, environmental, and industrial samples provided solid evidence to estimate chromium ions using TBFIPA in these real samples.