PSG Polytechnic College

Coimbatore, India

PSG Polytechnic College

Coimbatore, India
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Theivarasu C.,PSG College of Technology | Chandra S.,PSG Polytechnic College
International Journal of ChemTech Research | Year: 2014

Elephant Dung Activated Carbon (EDAC) prepared by acid treatment was used as an eco friendly adsorbent for the removal of a textile dye, Crystal Violet (CV) from an aqueous solution. Batch adsorption experiments were carried out to determine the kinetic, thermodynamic and isotherm parameters by varying the initial dye concentration and temperature. The adsorption kinetic data were correlated with Pseudo first order, Pseudo second order and Elovich models. Pseudo second order kinetic model fitted very well with the experimental data. The mechanism of adsorption process was determined by studying the intra particle diffusion and liquid film diffusion models. The effect of pH on percentage removal of CV was studied. It was found that the maximum adsorption took place in neutral and alkaline medium. The thermodynamic parameters like Gibb's Free energy change (ΔG), Entropy change (ΔS) and enthalpy change (ΔH) were calculated. The results indicated that CV adsorption process was endothermic and spontaneous. The experimental data were correlated with Langmuir, Freundlich and Temkin adsorption isotherm models. The data was best represented by Langmuir isotherm model.


Vinoth K.S.,PSG College of Technology | Subramanian R.,PSG College of Technology | Dharmalingam S.,PSG Polytechnic College | Anandavel B.,PSG College of Technology
Materiali in Tehnologije | Year: 2012

The mechanical and tribological characteristics of aluminium-molybdenum- disulphide self-lubricating composites have been investigated and compared to the Al-Si10Mg alloy. Al-Si10Mg/4MoS 2 display the finest microstructures due to a higher fraction of M0S 2 added. The densities of Al-Si10Mg/2MoS 2 and Al-Si10Mg/4MoS 2 were marginally higher than in the case of the aluminium alloy by 1 % and 2 % mass fractions, respectively. The ultimate tensile strength decreases considerably due to the additions of 2 % and 4 % M0S 2 by 15 % and 22 %, respectively, compared to the Al-Si10Mg alloy. It was seen that while the Al-Si10Mg alloy shows a predominantly ductile fracture (fibrous regions), the composite specimens (with an M0S 2 addition) show an increase in the mixed mode (ductile and brittle regions). Al-Si10Mg/2MoS2 and Al-Si10Mg/4MoS2 show an enormous decrease in the wear rate by 55 % and 65 %, respectively, compared with the Al-Si10Mg alloy. The decrease in the wear occurs due to the presence of an M0S 2 layer, which forms a film on the wear surface.


Theivarasu C.,PSG College of Technology | Chandra S.,PSG Polytechnic College
Oriental Journal of Chemistry | Year: 2011

Low cost activated carbon prepared from elephant dung was used as an eco-friendly adsorbent for the removal of the textile dye Rhodamine B from an aqueous solution. The adsorbent was characterized by Scanning Electron Microscope (SEM), X-Ray Diffraction(XRD), Thermo gravimetric(TG) and Fourier Transform Infra red (FT-IR)analysis. Batch adsorption experiments were carried out by varying the initial dye concentration, adsorbent dosage, pH and temperature. Zeta potential (pHZPC) was found to be 3.2. The optimum dosage of the adsorbent was found to be 100 mg. The adsorption process reached equilibrium within 240 minutes. Maximum amount of dye was adsorbed at pH 3. The percentage removal of the dye was increased with increase in temperature. The adsorption followed pseudo second order kinetic model. The experimental data can be best fitted with Langmuir isotherm compared to Freundlich isotherm. The thermodynamic parameters like Gibb's Free energy change (AG), Entropy change (AS) and enthalpy change (AH) were calculated which indicated that Rhodamine B adsorption process was endothermic and spontaneous.


Senthilkumar M.,PSG College of Technology | Kumar L.A.,PSG Polytechnic College
International Journal of Clothing Science and Technology | Year: 2016

Purpose: The purpose of this paper is to design and develop an instrument for non-destructive fabric grams per square metre (GSM) measurement. This study uses the capacitance principle to obtain the fabric GSM. The relative permittivity of the sample fabrics changes the capacitance value. A relationship between capacitance and GSM that best fits the look-up table is obtained. Also, the developed system is applicable for all kind of fabrics both knitted and woven fabrics. The comparison study was carried out with existing test method. Design/methodology/approach: The purpose of the study is to design and develop an instrument for non-destructive fabric GSM measurement. Findings: The proposed non-destructive method of fabric GSM measurement using capacitance principle is designed, developed and tested. Also, the developed system is applicable for all kind of fabrics both knitted and woven fabrics. The comparison study was carried out with existing test method. Research limitations/implications: The change in capacitance due to relative permittivity of the sample fabric is in pF range (10-12). The system can be further improved by using a capacitance sensor of sensitivity upto 1 fF (10-15). By doing so, the proposed system provides better results in terms of accuracy and resolution. The system developed can be further extended by making it online equipment which measures the fabric GSM instantaneously. Originality/value: So far there is no non-destructive testing method available for fabric weight measurement. The newly designed and developed instrument is used to test the fabric both woven and knitted non-destructively. © 2016, © Emerald Group Publishing Limited.


Theivarasu C.,PSG College of Technology | Chandra S.,PSG Polytechnic College
Electronic Journal of Environmental, Agricultural and Food Chemistry | Year: 2011

Low cost activated carbon prepared from elephant dung was used as an eco friendly adsorbent for the removal of the textile dye Reactive orange 16 from an aqueous solution. The adsorbent was characterized by Scanning electron microscope (SEM), Thermo gravimetric analysis (TG/DTA), X-Ray diffraction method (XRD) and Fourier Transform Infrared spectroscopic analysis (FT-IR). Batch adsorption experiments were carried out by varying the initial dye concentration, adsorbent dosage, pH and temperature. Zeta potential (pH ZPC) was found to be 3.2.The optimum dosage of the adsorbent was found to be 250 mg. The adsorption process reached equilibrium within 240 minutes. Maximum amount of dye was adsorbed at pH 2. The percentage removal of the dye increased with increase in temperature. The adsorption followed pseudo second order kinetic model. The experimental data can be best fitted with Langmuir isotherm compared to Freundlich isotherm. The thermodynamic parameters like ΔG, ΔS and ΔH were calculated which indicated that adsorption process was endothermic and spontaneous.


Rajamani A.,PSG Polytechnic College | Krishnaveni V.,PSG College of Technology
International Journal of Tomography and Simulation | Year: 2015

Visual communication plays vital role in modern trend and finds its applications in many image processing domains. While transmitting and storing the digital information, images are affected by different types of noises. Moreover images are often corrupted by source of noise due to a noisy channel or faulty image acquisition device. Many researchers have developed several algorithms for removing noise. The main aim is to suppress the noise while preserving the integrity of the edges and details of images. This paper exploits the soft computing technique of Adaptive Network based Fuzzy Inference System which is also known as Adaptive Neuro-Fuzzy Inference System (ANFIS) for different level of noise removal. It is presently finding numerous applications in variety of fields since Neuro-Fuzzy system adaptive of the Fuzzy system and the neural learning algorithm. The parameters are learned by Neural Network using optimized learning method. This paper deals with restoration of images from different noise sources by using ANFIS with different Membership Functions [MFs] and training epochs are examined. The technique outperforms and the results obtained are very good in both qualitative and quantitative wise. © 2015 by CESER PUBLICATIONS.


Rajamani A.,PSG Polytechnic College | Krishnaveni V.,PSG College of Technology | Ferose H.W.,PSG College of Technology | Kalaikamal M.,PSG College of Technology
Image Analysis and Stereology | Year: 2012

In this paper a novel Lone Diagonal Sorting (LDS) algorithm for denoising color images and videos corrupted with salt and pepper noise is proposed. The proposed lone diagonal sorting algorithm uses diagonal sorting alone for denoising of impulse noise. The algorithm has been implemented and tested for various color images and video signals and appreciable performance in terms of PSNR, MSE and SSIM is obtained. Our algorithm has been compared with other standard algorithms. A drastic improvement in the computational time has been achieved without compromising much on the visual quality after reconstruction.


Raja D.,Salem College | Babu V.R.,Kumaraguru College of Technology | Senthilkumar M.,PSG Polytechnic College | Ramakrishnan G.,Kumaraguru College of Technology | Kannan N.,Salem College
Journal of Industrial Textiles | Year: 2014

The dynamic sweat transfer tester for analyzing the sweat transfer behavior of multi-weave structure fabrics (single fabric contains different weave structures) has been designed and developed. This instrument has been developed to evaluate the sweat transfer rate in 16 different directions and 48 different regions for a test specimen of 7 cm diameter. The concept of the sweat measurement is to measure the sweat transport time required to reach the unit area of the fabric. The instrument works under the principle of electrical conductivity, that is, wetted cotton fabric acts as an electrical conductor between the power connected (5 V) copper pins and ground connected copper pins. The unique feature of this instrument is that the sweat transfer rate can be measured in fabrics which have irregular spreading behavior (single fabric that has different weave structures) at one step. Twelve different woven fabrics have been analyzed for the sweat transfer behavior using the instrument, and the results were well correlated (R2 = 0.925) with manual test method. © SAGE Publications 2013 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.


Mani S.,PSG Polytechnic College | Anbumani N.,PSG Polytechnic College
Journal of Engineered Fibers and Fabrics | Year: 2014

The dynamic elastic behavior such as dynamic work recovery and stress at specific extension of the fabrics helps to analyze the instant garment response to body movements. It is an objective evaluation of the performance of the elastic fabrics for tight fit sportswear. The aim of the study was to compare the dynamic elastic behavior of cotton/ spandex fabrics with 100% cotton fabrics, since it is mandatory to know the level of performance of the cotton/spandex fabrics as compared with normal cotton fabrics with respect to energy gain or work recovery by the fabric which is necessary in evaluating the performance of the garment for specific sports application. It was found that the cotton/spandex fabrics have higher dynamic work recovery and lower stress value than those of cotton fabrics for both walewise and coursewise directions. The predictions of dynamic work recovery and stress values for different extension levels were made using a regression model.


Senthilkumar M.,PSG Polytechnic College | Anbumani N.,PSG Polytechnic College
Melliand International | Year: 2010

The present work studies the effect of heat-setting and compacting temperature on dynamic elastic properties of spandex plaited cotton knitted fabric. Spandex fibers are less fast to dyes than most hard fibers, which must be taken into account during dyeing or subsequent wet processing. Body comfort fit can be indirectly evaluated by measuring garment or fabric elastic stretch and elastic recovery. The effect of heat-setting and compacting temperature on dynamic elastic properties of spandex plaited cotton knitted fabric at different extension level such as 20%, 30%, 40% and 50% extension has been analyzed. Effect of compacting temperature on dynamic elastic recovery of knitted fabric has no significant effect and different level of extension has significant effect at wale wise direction. Loop shape factor of the fabric directly influences the fabric dynamic elastic recovery. Higher the loop shape factor higher the DERR of the fabric.

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