Synthesis of Polyaniline-Zinc Oxide Composites and Its Usage as Ammonia Gas Sensor

Vol.1  No.4

Year : 2014

Issue : Jan-Mar

Title : Synthesis of Polyaniline-Zinc Oxide Composites and Its Usage as Ammonia Gas Sensor

Author Name : Vivek Talwar, Ravi Chand Singh

Synopsis :

This paper present synthesis of Polyaniline-Zinc Oxide Composites and their usage as Ammonia Gas Sensor. The authors adopted a novel chemical route for the synthesis of polyaniline composites via chemical method. These samples were prepared by oxidation of aniline via rapid mixing method. Aniline solution is prepared in sulphuric acid with addition of fixed wt % of zinc oxide. PANI-ZnO composites were synthesized by rapid mixing of ammonium persulphate to aniline solution in an ice bath. The synthesized samples were characterized using X-ray Diffraction (XRD) and Field Emission Scanning Electron Microscope (FESEM) techniques. The morphology of synthesized samples exhibited fibrous and spherical structures. The thick films were prepared salt deposited on alumina substrate for gas sensing application. These sensors exhibited excellent response and recovery time, when exposed to different concentration of ammonia gas at room temperature.

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Cellulosic Nanocomposites: Functional Vector For Arsenic Remediation

Vol.1  No.4

Year : 2014

Issue : Jan-Mar

Title : Cellulosic Nanocomposites: Functional Vector For Arsenic Remediation

Author Name : Kiran Singh, TJM Sinha, Shalini Srivastava

Synopsis :

Surface Functionalization of Nanocrystalline Cellulose using Diethyl Amine was carried out to form an Anion Adsorbent (3-N-N' dimethylamino-2-hydroxypropyl Nanocrystalline Cellulose Ether) for Arsenic Remediation. The product was thoroughly characterized using modern tools. Nano-biosorbent had high efficiency of removal of trivalent (85.20 %) and pentavalent (97.60 %) arsenic from aqueous solutions, even at low concentrations. Adsorption capacity was found to be 8.28 and 9.56 mg/g for As (III) and As (V) respectively. Functionalized nano-biosorbent is ideally suited for economic biosorbent for pretreatment step before large scale chemical treatments for arsenic remediation.

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Xanthan Gum Based Gel Electrolyte Containing NaOH

Vol.1  No.4

Year : 2014

Issue : Jan-Mar

Title : Xanthan Gum Based Gel Electrolyte Containing NaOH

Author Name : Narinder Arora, Viney Sharma, Rajesh Kumar

Synopsis :

Ionic conductivity of xanthan gum based gel electrolytes containing NaOH has been studied and the maximum ionic conductivity (σ = 88.8 mS/cm) at room temperature has been recorded. The behavior of ionic conductivity with the rise in temperature has been observed. A small change in ionic conductivity of xanthan gum based gel electrolytes containing sodium hydroxide (NaOH) has been observed with the passage of time. pH value of gel electrolyte containing NaOH shows their basic in nature.

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An Investigation On Finishing Technique Using Abrasives In The Presence Of A Magnetic Field

Vol.1  No.4

Year : 2014

Issue : Jan-Mar

Title : An Investigation On Finishing Technique Using Abrasives In The Presence Of A Magnetic Field

Author Name : Govindan P, Rahul M S

Synopsis :

The techniques for finishing of materials are being developed for applications in the Industry. Among these applications, there are several challenging situations such as Machining of Complex Features/sections on Products and Cutting of Metallic as well as Non-Metallic Materials. It is proposed that the methods using abrasives under the application of a magnetic field is appropriate for fine finishing. The abrasives are controlled by the magnetic forces and the machining forces are transferred to the workpiece surfaces. The quality of surface finish obtained depends on the quality of abrasives and the magnetic Lorentz forces. Considering the cost optimization of finishing process using magnetic abrasives, cost of the abrasive is of primary concern. The number of abrasive particles transferred to the intended cutting zone, size variation in the abrasive particles and the velocity of impingement of abrasive particles significantly influences the material removal mechanisms. It is evident that the generation of abrasives is also a challenging task. Therefore, in this paper, a preliminary study is carried out on finishing methods by employing the abrasives, under the effect of magnetic field. The significance of magnetic field application on various aspects of material removal is correlated.

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Application of Taguchi Method for Determining Optimum Process Parameters of PMEDM with SiC Powder Suspended in Dielectric

Vol.1  No.3

Year : 2013

Issue : Oct-Dec

Title : Application of Taguchi Method for Determining Optimum Process Parameters of PMEDM with SiC Powder Suspended in Dielectric

Author Name : Deepak Rajendra Unune, Amit Aherwar, Bhargav Prajwal, Jai Kishan

Synopsis :

Powder Mixed Electro-Discharge Machining (PMEDM) is being widely used in modern metal working industry for producing complex cavities in dies and moulds. It has been experimentally demonstrated that the presence of suspended particles in dielectric fluid significantly increases the machining efficiency of EDM process.In this paper, five parameters viz., concentration of silicon carbide (SiC) in dielectric fluid (P ), peak current (I ), gap voltage (V ), pulse on C p g time (T ) and duty cycle (η) were considered and varied to obtain optimal EDM performance characteristics including on Material Removal Rate (MMR) and surface roughness (R ). Taguchi L8 orthogonal array was used for the design of the a experiment.The machining tests were conducted on AISI D3 tool steel work piece using copper electrodes and SiC mixed EDM dielectric-kerosene oil. Results of experiments show that concentration of SiCimproves MRR in PMEMD.

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Optimization of process parameters on machining force and MRR in milling of GFRP composites using grey relational analysis

Vol.1  No.3

Year : 2013

Issue : Oct-Dec

Title : Optimization of process parameters on machining force and MRR in milling of GFRP composites using grey relational analysis

Author Name : M.P. Jenarthanan, NARESH NEELI

Synopsis :

This paper investigates the effect and parametric optimization of process parameters for milling of GFRP (Glass Fiber Reinforced Polymer) composites using Grey Relational Analysis. Experiments were conducted using helix angle, spindle speed, feed rate, depth of cut and fibre orientation angle as typical process parameters. The grey relational analysis was adopted to obtain grey relational grade for milling process with multiple characteristics, namely Machining Force and Material Removal Rate (MRR). Analysis of variance (ANOVA) was performed to get the contribution of each parameter on the performance characteristics and it was observed that helix angle and fibre orientation angle were the most significant process parameters that affects the milling of GFRP composites. The experimental results reveal that, the helix o angle of 45 , spindle speed of 3000rpm, feed rate of 1000mm/min, depth of cut of 2mm and fibre orientation angle of o 15 is the optimum combination for lower machining force and higher material removal rate. The experimental results for the optimal setting show that there is considerable improvement in the process.

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Composites from waste for civil engineering applications

Vol.1  No.3

Year : 2013

Issue : Oct-Dec

Title : Composites from waste for civil engineering applications

Author Name : Manish Lila, Fanindra Kumar, Sanjay Sharma

Synopsis :

Composites are becoming more and more important as it can help in improving the quality of life. Now-a-days, composites are used in aeronautics, automobiles, boats, pipelines, buildings, roads, bridges, and dozens of other products. Researchers are finding ways to improve the qualities of composites so that they may be strong, lightweight, long-lasting, and inexpensive to produce. But the main factor which plays a major role in use of composites, is the cost of matrix and reinforcement. This paper provides information about easy availability of fibres, by-products and wastes from industries, technical properties and their potential for utilization in development and use of fibres’ composites materials in civil engineering field and construction industries. The matrix (Prime) material alone cannot achieve the good properties of composites. The focus is also kept in developing and making available, durable and reliable at reasonably minimum competitive price or cost.

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