Articles

Synthesis of PVA/TiO2 Composite Layer over Conductive Textile Sheet Using Electrospinning Method for Enhancing Self-Cleaning Properties

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The present research used the electrospinning method to apply a polyvinyl alcohol/titanium dioxide (PVA/TiO2) layer over a conductive textile (70 % polyester and 30 % cotton) sheet. PVA with 10, 12.5, and 15 g concentrations was mixed into 100 ml distilled water. Then, each PVA solution was mixed with 1.5 wt.% of TiO2. Afterward, the electrospinning method applied a PVA/TiO2 composite onto a conductive textile sheet. Various characterizations were conducted, such as resistivity, scanning electron microscopy (SEM), Fourier transforming infrared (FTIR), and photocatalytic activity. The resistivity result is 9.5, 10, and 10  for A, B, and C samples. According to SEM investigation, higher PVA concentration leads to higher fiber sizes around 0.65 µm. An increase in PVA content does not affect the bands that were formed. The size of the fiber diameter contributed to the photocatalytic activity of MB. A smaller fiber diameter could enhance photocatalytic activity.

Effect of Molar Ratio on Structure of PPy-PVA Composite Film

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A chemical oxidation method is used to synthesize pyrrole with ferric chloride as oxidant to prepare polypyrrole. Multiple chemical oxidations were carried out using various molar ratios. A stock solution of PolyVinyl Alcohol was produced to form composites of polymers. The PPy-PVA composites were achieved with the help of solution casting method to obtained free standing films. These composites films were characterized using SEM, FTIR and XRD techniques. The result of SEM, FTIR, and XRD reveals that the surface morphology varies as per the molar ratio. Along with the surface morphology molar ratio the conductivity of composite films was studied in the temperature range 303 K-343 K using two probe conductivity method. It has been observed that molar ratio also plays an important role in the conductivity of composite films.

Study on Comparative Analysis of Polymerization of Pyrrole Using Electrochemical Method and UV Photo Irradiation

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Polymerization of pyrrole using various methods like pyrrole using electrochemical method and UV Photo irradiation has been investigated. Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), X-ray diffraction (XRD) techniques were used to study the internal structure, material morphology, chemical nature of conducting polymers. The temperature dependence of the electrical conductivity of the Polypyrrole, Their behavior resemble the metallic conductors.