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The nanocomposite of polyamide 6 (PA6)/poly(methyl methacrylate) (PMMA)/carboxylic acid functionalized single walled carbon nanotubes (SWCNTs-COOH) was prepared in a weight ratio of 49.5/49.5/1 at 2308C by using melt-mixing method. The PA6/PMMA blend with weight ratio of 50/50 served as reference. The Fourier transform infrared analysis of nanocomposite shows the occurrence of hydrogen-bonding interactions among PA6, PMMA, and SWCNTs-COOH. Thermal studies of nanocomposite exhibited higher thermal stability and increased crystallinity of PA6 in nanocomposite compared to the blend. The X-ray diffraction curve of nanocomposite indicates that the rich a II phase of PA6 was higher compare to the blend. The scanning electron microscope analysis of nanocomposite confirmed that PMMA exhibited as a uniform dispersion and existed as co-continuous phase morphology in a continuous phase of PA6 compared to the blend. Furthermore, the obtained results suggest that the incorporation of SWCNTs-COOH into the PA6/PMMA blend enhances the compatibility as a compatibilizer between the two polymer components. POLYM. ENG. SCI., 53:397-402, 2013. ª

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Dinuclear zinc(II) complex of the 18-membered tetraiminediphenol macrocycle has been synthesized by Schiff base condensation of 2,6-diformyl-4-methylphenol and 1,2-diaminobenzene in the presence of zinc(II) template. The obtained complex has been characterized by the spectroscopic techniques and mass spectrometry. The complex exhibits high thermal stability and forms ZnO nanoparticles on thermal decomposition. The diffraction peaks in the X-Ray diffraction spectra indicated that the complexes are crystalline. The surface morphology has been investigated by scanning electron microscopy. Energy dispersive X-ray analysis shows the chemical purity and stoichiometry of the ZnO nanoparticles. The BET surface area of ZnO nanoparticles has been found. The transmission electron microscopy result shows spherical shaped ZnO nanoparticles with the size of 20 nm. Quantum confinement effects are clearly revealed in UV-Vis spectroscopy technique.

This paper describes a robust autonomous disinfection tunnel to disinfect external surfaces of COVID-19 virus such as clothes and open body sections in public places such as airports, office complexes, schools, and malls. To make the tunnel effective and highly efficient, it has been provided with two chambers with three disinfection processes. Due to the multiple processes, the possibility of neutralizing the virus is quite high and higher than other solutions available at this point for this purpose. Chamber 1 sprays the solution of a disinfectant on the person. This solution can be either a dilute solution of approved chemical or any Ayurvedic/herbal disinfectant. Once the person enters chamber 2, he/she is exposed to hot air at 70 °C along with far-ultraviolet C rays (207-222 nm). Both chambers function autonomously by detecting a person in a chamber using ultrasonic sensors. The proposed tunnel is developed under industry-academia collaboration jointly by Technopark@iitk and ALIMCO under the ambit of the Ministry of Human Resources Development and the Ministry of Social Justice and Empowerment, respectively. The tunnel is referred to as the 'Techno Advanced Disinfection Tunnel' (TADT).

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