The objectives of the present study were to develop an environmentally friendly, low-price, easy,... more The objectives of the present study were to develop an environmentally friendly, low-price, easy, and fast method for developing antipathogenic (antibacterial, antifungal, and antiviral) cuprous-oxide-coated multifunctional fabrics. The fabrics were first sensitized with citric acid, and then Cu2O particles were formed using the Fehling solution method. The cuprous oxide particles were then applied to the cotton fabrics. To create the Cu2O particles, three different kinds of reducing agents with varying concentrations were used. SEM, dynamic light scattering, FTIR, EDS, and XRD were used to examine the surface morphologies and metal presences. In the second step, a reactive antibacterial dye was made (by reacting Reactive Blue 4 with triclosan). The molecular structure of the modified dye was confirmed with FTIR. The resultant antibacterial dye was applied on the copper-treated cotton fabrics in accordance with the exhaust dyeing protocol. The dyed fabrics were characterized through...
Recently, the research and development of textile-based sensors have attracted considerable atten... more Recently, the research and development of textile-based sensors have attracted considerable attention. Changes in electrical conductivity (EC) and electromagnetic (EM) shielding effectiveness (SE) during external stimuli are the most frequently studied output. In this study, the EC and EM SE of an electro-conductive 1 × 1 rib knitted fabric made of metal-coated yarn were investigated during uniaxial and biaxial stretching. According to a theoretical survey, 2 main mechanisms are expected to influence the EC of the fabric under mechanical stress: the contact resistance at the junction of two yarns at low levels of applied force and the electrical resistance (ER) of yarn at high stress. Therefore, the electromechanical properties of single, single-loop, and multiloop yarns were also explored to explain the knitted fabric behavior during uniaxial and biaxial stretching. The SE of the knitted fabric varied from 63 to 47 dB based on the type and level of stretching. Using tests with yarn...
Electric and electronic devices are mainly emitting electromagnetic radiation, and shielding from... more Electric and electronic devices are mainly emitting electromagnetic radiation, and shielding from radiation is essential. Electrically conductive materials are suitable for radiation shielding applications. The designing of the textile material for the radiation shielding is challenging because of its open area and design. In general, more open area has transmit the radiations tend to lesser in shielding. Another factor is the laying angle of the textile material also plays important role beyond open area. In this study, the effect of laying angle and open area was analysed for effective utilization of conductive materials. The conductive nonwoven fabric was used to form as strips to simulate the various textile structures for shielding application. The Cu/Ni coated ultrathin polyester nonwoven fabric sample is taken to form two-layers strips and test for electromagnetic shielding effectiveness. In experimental design, three factors of strips which are strips laid angle, strip thick...
Nonwoven fabrics are widely used for thermal insulation and sound absorption purpose in construct... more Nonwoven fabrics are widely used for thermal insulation and sound absorption purpose in construction and automobile fields. It is essential to investigate their thermal conductivity and sound absorption coefficient. Five cross-laid nonwoven fabrics are measured on the Alambeta device and Brüel & Kjær impedance tube. Bogaty and Bhattacharyya models are selected to predict the thermal conductivity, and Voronina and Miki models are used to predict the sound absorption coefficient. The predicted thermal conductivity shows a significant difference compared with the measured values. It is concluded that Bogaty and Bhattacharyya models are not suitable for high porous nonwoven fabric. In addition, the results of Voronina and Miki models for sound absorption prediction are acceptable, but Voronina model shows lower mean prediction error compared with Miki model. The results indicate that Voronina model can be used to predict the sound absorption of cross-laid nonwoven fabric.
Electromagnetically shielding textile materials, especially in professional or ordinary clothing,... more Electromagnetically shielding textile materials, especially in professional or ordinary clothing, are used to protect an implanted pacemaker in the body. Alternatively, traditional textiles are known for their non-conductivity and transparency to an electromagnetic field. The main goal of this work was to determine whether the high moisture content (sweat) of the traditional textile structure significantly affects the resulting ability of the material to shield the electromagnetic field. Specifically, whether sufficient wetting of the traditional textile material can increase its electrical conductivity to match the electrically conductive textiles determined for shielding of the electromagnetic field. In this study, cotton and polyester knitted fabric samples were used, and two liquid medias were applied to the samples to simulate human sweating. The experiment was designed to analyse the factors that have a significant effect on the shielding effectiveness that was measured accord...
Electromagnetically shielding textile materials, especially in professional or ordinary clothing,... more Electromagnetically shielding textile materials, especially in professional or ordinary clothing, are used to protect an implanted pacemaker in the body. Alternatively, traditional textiles are known for their non-conductivity and transparency to an electromagnetic field. The main goal of this work was to determine whether the high moisture content (sweat) of the traditional textile structure significantly affects the resulting ability of the material to shield the electromagnetic field. Specifically, whether sufficient wetting of the traditional textile material can increase its electrical conductivity to match the electrically conductive textiles determined for shielding of the electromagnetic field. In this study, cotton and polyester knitted fabric samples were used, and two liquid medias were applied to the samples to simulate human sweating. The experiment was designed to analyse the factors that have a significant effect on the shielding effectiveness that was measured accord...
IOP Conference Series: Materials Science and Engineering, 2017
This study was focussed to investigate the effect of fluorocarbon, hydrocarbon and hybrid fluoroc... more This study was focussed to investigate the effect of fluorocarbon, hydrocarbon and hybrid fluorocarbon on the mechanical properties and moisture regain of jute fiber reinforced composites. A significant difference in moisture regain values of treated and untreated reinforcement samples was observed at a concentration of 40 g/l. The composite made from treated reinforcement regained very low moisture content and exhibited improved mechanical properties (tensile and flexural strength). Being dual nature (hydrophilic and hydrophobic groups) of Hybrid fluorocarbon, the treated jute fibers and corresponding composites showed better properties as compared to other two chemicals due to better interface.
IOP Conference Series: Materials Science and Engineering, 2017
In this study, the different proportion of conductive component blended with polypropylene yarn w... more In this study, the different proportion of conductive component blended with polypropylene yarn were taken for making conductive textile samples for analysis of electromagnetic shielding effectiveness, fabric bending moment and air permeability. The ASTM D4935 coaxial transmission line method was used to study the electromagnetic shielding. Electromagnetic shielding effectiveness of textile structures containing different percentage of metal content ranges from 1 to 50 dB at high frequency range. Breathability of structures, more precisely air permeability was considered as one of important parameters for designing of electromagnetic radiation protective fabrics for certain applications. The bending moment of samples is decreases with increasing metal component percent.
In this study, 32 different electro-conductive fabrics and seven different non-conductive fabrics... more In this study, 32 different electro-conductive fabrics and seven different non-conductive fabrics were taken for an analysis of their electromagnetic shielding ability, electrical resistivity and air permeability. According to the present state of development of electromagnetic shielding textile structures, a diverse set of samples was selected, including stainless steel, copper, silver, aluminum, carbon and polypyrrole as a conductive component. The ASTM D4935 coaxial transmission line method was used to study the electromagnetic shielding and the ASTM D257 ring electrode method was used to evaluate the surface and volume electrical resistivity of all the samples. Air permeability was considered as an additional important parameter for the production of electromagnetic radiation protective fabrics designed for technical or clothing applications. It was confirmed that textile structures made of conventional textile fibers are transparent to an electromagnetic field. The electromagne...
In this study, we make the electrically conductive multifunctional and durable fabrics by silver ... more In this study, we make the electrically conductive multifunctional and durable fabrics by silver and copper nanoparticles. The fabric structure was pretreated with citric acid then nanoparticles were directly grown on fabric structure. The effect of pretreatment was analyzed by FTIR. The dynamic light scattering, SEM and XRD techniques were employed to study the morphology of deposited silver and copper particles. The utility of conductive fabrics was analyzed for electromagnetic shielding ability over frequency range of 30 MHz to 1.5 GHz. Furthermore, the role of deposited particles on antibacterial properties was examined against pathogenic bacteria such as Staphylococcus aureus and Escherichia coli. At the end, the durability of coated fabrics for comfort and electrical properties were examined against several washing cycles. The fabrics showed good retention of the particles, proved by SEM microstructures and small loss in the conductivity of the material after washing.
Electromagnetic (EM) radiation is everywhere in this world and galaxy in different forms and leve... more Electromagnetic (EM) radiation is everywhere in this world and galaxy in different forms and levels. In some cases, human beings need to protect themselves from electromagnetic radiations and the same thing is also recommended for electronic devices as well. Lots of studies are there on the shielding of electromagnetic radiation interference using metals, polymers, and minerals. For protecting the human being, textile structures are playing the main role. In the textile material structure itself many types are there; each one is having its unique geometrical shape and design. In this work, the copper/nickel-coated ultrathin nonwoven fabric is prepared like a strip. The 3, 6, and 9 mm thick strips are prepared and laid at different gaps, angles, and layered to study the effect of factors on EM shielding effectiveness as per ASTM D4935-10 standard. The design of experiment has been done to analyze the three factors and three levels of the strip properties having an influence on electr...
The objectives of the present study were to develop an environmentally friendly, low-price, easy,... more The objectives of the present study were to develop an environmentally friendly, low-price, easy, and fast method for developing antipathogenic (antibacterial, antifungal, and antiviral) cuprous-oxide-coated multifunctional fabrics. The fabrics were first sensitized with citric acid, and then Cu2O particles were formed using the Fehling solution method. The cuprous oxide particles were then applied to the cotton fabrics. To create the Cu2O particles, three different kinds of reducing agents with varying concentrations were used. SEM, dynamic light scattering, FTIR, EDS, and XRD were used to examine the surface morphologies and metal presences. In the second step, a reactive antibacterial dye was made (by reacting Reactive Blue 4 with triclosan). The molecular structure of the modified dye was confirmed with FTIR. The resultant antibacterial dye was applied on the copper-treated cotton fabrics in accordance with the exhaust dyeing protocol. The dyed fabrics were characterized through...
Recently, the research and development of textile-based sensors have attracted considerable atten... more Recently, the research and development of textile-based sensors have attracted considerable attention. Changes in electrical conductivity (EC) and electromagnetic (EM) shielding effectiveness (SE) during external stimuli are the most frequently studied output. In this study, the EC and EM SE of an electro-conductive 1 × 1 rib knitted fabric made of metal-coated yarn were investigated during uniaxial and biaxial stretching. According to a theoretical survey, 2 main mechanisms are expected to influence the EC of the fabric under mechanical stress: the contact resistance at the junction of two yarns at low levels of applied force and the electrical resistance (ER) of yarn at high stress. Therefore, the electromechanical properties of single, single-loop, and multiloop yarns were also explored to explain the knitted fabric behavior during uniaxial and biaxial stretching. The SE of the knitted fabric varied from 63 to 47 dB based on the type and level of stretching. Using tests with yarn...
Electric and electronic devices are mainly emitting electromagnetic radiation, and shielding from... more Electric and electronic devices are mainly emitting electromagnetic radiation, and shielding from radiation is essential. Electrically conductive materials are suitable for radiation shielding applications. The designing of the textile material for the radiation shielding is challenging because of its open area and design. In general, more open area has transmit the radiations tend to lesser in shielding. Another factor is the laying angle of the textile material also plays important role beyond open area. In this study, the effect of laying angle and open area was analysed for effective utilization of conductive materials. The conductive nonwoven fabric was used to form as strips to simulate the various textile structures for shielding application. The Cu/Ni coated ultrathin polyester nonwoven fabric sample is taken to form two-layers strips and test for electromagnetic shielding effectiveness. In experimental design, three factors of strips which are strips laid angle, strip thick...
Nonwoven fabrics are widely used for thermal insulation and sound absorption purpose in construct... more Nonwoven fabrics are widely used for thermal insulation and sound absorption purpose in construction and automobile fields. It is essential to investigate their thermal conductivity and sound absorption coefficient. Five cross-laid nonwoven fabrics are measured on the Alambeta device and Brüel & Kjær impedance tube. Bogaty and Bhattacharyya models are selected to predict the thermal conductivity, and Voronina and Miki models are used to predict the sound absorption coefficient. The predicted thermal conductivity shows a significant difference compared with the measured values. It is concluded that Bogaty and Bhattacharyya models are not suitable for high porous nonwoven fabric. In addition, the results of Voronina and Miki models for sound absorption prediction are acceptable, but Voronina model shows lower mean prediction error compared with Miki model. The results indicate that Voronina model can be used to predict the sound absorption of cross-laid nonwoven fabric.
Electromagnetically shielding textile materials, especially in professional or ordinary clothing,... more Electromagnetically shielding textile materials, especially in professional or ordinary clothing, are used to protect an implanted pacemaker in the body. Alternatively, traditional textiles are known for their non-conductivity and transparency to an electromagnetic field. The main goal of this work was to determine whether the high moisture content (sweat) of the traditional textile structure significantly affects the resulting ability of the material to shield the electromagnetic field. Specifically, whether sufficient wetting of the traditional textile material can increase its electrical conductivity to match the electrically conductive textiles determined for shielding of the electromagnetic field. In this study, cotton and polyester knitted fabric samples were used, and two liquid medias were applied to the samples to simulate human sweating. The experiment was designed to analyse the factors that have a significant effect on the shielding effectiveness that was measured accord...
Electromagnetically shielding textile materials, especially in professional or ordinary clothing,... more Electromagnetically shielding textile materials, especially in professional or ordinary clothing, are used to protect an implanted pacemaker in the body. Alternatively, traditional textiles are known for their non-conductivity and transparency to an electromagnetic field. The main goal of this work was to determine whether the high moisture content (sweat) of the traditional textile structure significantly affects the resulting ability of the material to shield the electromagnetic field. Specifically, whether sufficient wetting of the traditional textile material can increase its electrical conductivity to match the electrically conductive textiles determined for shielding of the electromagnetic field. In this study, cotton and polyester knitted fabric samples were used, and two liquid medias were applied to the samples to simulate human sweating. The experiment was designed to analyse the factors that have a significant effect on the shielding effectiveness that was measured accord...
IOP Conference Series: Materials Science and Engineering, 2017
This study was focussed to investigate the effect of fluorocarbon, hydrocarbon and hybrid fluoroc... more This study was focussed to investigate the effect of fluorocarbon, hydrocarbon and hybrid fluorocarbon on the mechanical properties and moisture regain of jute fiber reinforced composites. A significant difference in moisture regain values of treated and untreated reinforcement samples was observed at a concentration of 40 g/l. The composite made from treated reinforcement regained very low moisture content and exhibited improved mechanical properties (tensile and flexural strength). Being dual nature (hydrophilic and hydrophobic groups) of Hybrid fluorocarbon, the treated jute fibers and corresponding composites showed better properties as compared to other two chemicals due to better interface.
IOP Conference Series: Materials Science and Engineering, 2017
In this study, the different proportion of conductive component blended with polypropylene yarn w... more In this study, the different proportion of conductive component blended with polypropylene yarn were taken for making conductive textile samples for analysis of electromagnetic shielding effectiveness, fabric bending moment and air permeability. The ASTM D4935 coaxial transmission line method was used to study the electromagnetic shielding. Electromagnetic shielding effectiveness of textile structures containing different percentage of metal content ranges from 1 to 50 dB at high frequency range. Breathability of structures, more precisely air permeability was considered as one of important parameters for designing of electromagnetic radiation protective fabrics for certain applications. The bending moment of samples is decreases with increasing metal component percent.
In this study, 32 different electro-conductive fabrics and seven different non-conductive fabrics... more In this study, 32 different electro-conductive fabrics and seven different non-conductive fabrics were taken for an analysis of their electromagnetic shielding ability, electrical resistivity and air permeability. According to the present state of development of electromagnetic shielding textile structures, a diverse set of samples was selected, including stainless steel, copper, silver, aluminum, carbon and polypyrrole as a conductive component. The ASTM D4935 coaxial transmission line method was used to study the electromagnetic shielding and the ASTM D257 ring electrode method was used to evaluate the surface and volume electrical resistivity of all the samples. Air permeability was considered as an additional important parameter for the production of electromagnetic radiation protective fabrics designed for technical or clothing applications. It was confirmed that textile structures made of conventional textile fibers are transparent to an electromagnetic field. The electromagne...
In this study, we make the electrically conductive multifunctional and durable fabrics by silver ... more In this study, we make the electrically conductive multifunctional and durable fabrics by silver and copper nanoparticles. The fabric structure was pretreated with citric acid then nanoparticles were directly grown on fabric structure. The effect of pretreatment was analyzed by FTIR. The dynamic light scattering, SEM and XRD techniques were employed to study the morphology of deposited silver and copper particles. The utility of conductive fabrics was analyzed for electromagnetic shielding ability over frequency range of 30 MHz to 1.5 GHz. Furthermore, the role of deposited particles on antibacterial properties was examined against pathogenic bacteria such as Staphylococcus aureus and Escherichia coli. At the end, the durability of coated fabrics for comfort and electrical properties were examined against several washing cycles. The fabrics showed good retention of the particles, proved by SEM microstructures and small loss in the conductivity of the material after washing.
Electromagnetic (EM) radiation is everywhere in this world and galaxy in different forms and leve... more Electromagnetic (EM) radiation is everywhere in this world and galaxy in different forms and levels. In some cases, human beings need to protect themselves from electromagnetic radiations and the same thing is also recommended for electronic devices as well. Lots of studies are there on the shielding of electromagnetic radiation interference using metals, polymers, and minerals. For protecting the human being, textile structures are playing the main role. In the textile material structure itself many types are there; each one is having its unique geometrical shape and design. In this work, the copper/nickel-coated ultrathin nonwoven fabric is prepared like a strip. The 3, 6, and 9 mm thick strips are prepared and laid at different gaps, angles, and layered to study the effect of factors on EM shielding effectiveness as per ASTM D4935-10 standard. The design of experiment has been done to analyze the three factors and three levels of the strip properties having an influence on electr...
Uploads
Papers by Sundaramoorthy Palanisamy