The Experts below are selected from a list of 753 Experts worldwide ranked by ideXlab platform
G. Thilagavathi - One of the best experts on this subject based on the ideXlab platform.
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application of prickly chaff achyranthes aspera linn leaves as herbal Antimicrobial Finish for cotton fabric used in healthcare textiles
NPR Vol.7(4) [July-August 2008], 2008Co-Authors: G. Thilagavathi, T KannaianAbstract:Prickly chaff (Achyranthes aspera Linn.) leaves are reported to have Antimicrobial properties. An innovative approach was made to utilize this eco-friendly and renewable source for production of microbial resistant fabric. The chemical nature of the leaf extract was determined using HPLC and extraction of active substance from the leaves was done using methanol. The method of application of this herbal extract on cotton fabric using citric acid as cross-linking agent and the process variables have been standardized using Box and Behnken three level three variable experimental design. The Antimicrobial activity of the Finished fabric based on optimized process parameters was assessed against bacteria that normally exist in the textile environment like Gram positive, Staphylococcus aureus (ATCC 6538) and Gram negative, Escherichia coli (ATCC 11230) by both quantitative method (AATCC 100) and qualitative methods like Parallel Streak (AATCC 147) and Agar Diffusion method (SN 195 920). The Finished cotton fabrics showed the bacterial reduction percentage of 92 and 50 against S. aureus and E. coli, respectively.
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investigation on the effect of rf air plasma and neem leaf extract treatment on the surface modification and Antimicrobial activity of cotton fabric
Applied Surface Science, 2008Co-Authors: K Vaideki, S Jayakumar, R Rajendran, G. ThilagavathiAbstract:A thorough investigation on the Antimicrobial activity of RF air plasma and azadirachtin (neem leaf extract) treated cotton fabric has been dealt with in this paper. The cotton fabric was given a RF air plasma treatment to improve its hydrophilicity. The process parameters such as electrode gap, time of exposure and RF power have been varied to study their effect in improving the hydrophilicity of the cotton fabric and they were optimized based on the static immersion test results. The neem leaf extract (azadirachtin) was applied on fabric samples to impart Antimicrobial activity. The Antimicrobial efficacy of the samples have been analysed and compared with the efficacy of the cotton fabric treated with the Antimicrobial Finish alone. The investigation reveals that the RF air plasma has modified the surface of the fabric, which in turn increased the Antimicrobial activity of the fabric when treated with azadirachtin. The surface modification due to RF air plasma treatment has been analysed by comparing the FTIR spectra of the untreated and plasma treated samples. The molecular interaction between the fabric, azadirachtin and citric acid which was used as a cross linking agent to increase the durability of the Antimicrobial Finish has also been analysed using FTIR spectra.
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Microencapsulation of herbal extracts for microbial resistance in healthcare textiles
2007Co-Authors: G. Thilagavathi, S Krishna BalaAbstract:Antimicrobial Finish has been imparted to the cotton fabric using extracts of neem and Mexican daisy by direct application and by microencapsulation using pad-dry-cure method. To enhance the durability of Antimicrobial Finish to number of washes, the microencapsulation of herbal extracts has been done using phase separation / coacervation. Microcapsules are produced using herbal extracts as core and acacia as wall material. Structure of microcapsules has been evaluated using light microscopy with image analysis technique, the presence of microcapsules by scanning electron microscopy, the Antimicrobial efficacy by quantitative method in terms of bacterial reduction, and the wash durability of Antimicrobial activity by AATCC 124. It is observed that the microencapsulated herbal extracts possess a very good resistance for microbes even after 15 washes.
R Rajendran - One of the best experts on this subject based on the ideXlab platform.
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Application of seabuckthorn (Hippophae rhamnoides L.) leaf extract as Antimicrobial Finish on aramid fabric
Journal of Industrial Textiles, 2014Co-Authors: Yogendra Kumar, R Rajendran, T. S. Raghu, F. V. Varghese, R. Indu Shekar, T.m. Kotresh, K Murugesh Babu, V.c. PadakiAbstract:In this study, we have extracted bioactive compounds from seabuckthorn (SBT) leaves. Total flavonoid content of SBT leaf extract estimated as rutin equivalent was found to be 116.98 ± 3.06 mg/g of ...
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extraction and application of natural silk protein sericin from bombyx mori as Antimicrobial Finish for cotton fabrics
Journal of The Textile Institute, 2012Co-Authors: R Rajendran, C Balakumar, R Sivakumar, T Amruta, N DevakiAbstract:In this study, we developed an effective technology for the extraction of sericin from the cocoons of Bombyx mori silk worms. Sericin was extracted with ice cold ethanol to obtain crude extract. Sericin extract was coated onto cotton fabric by a pad–dry–cure method. FTIR characterization of the sericin-coated cotton fabric showed distinct amide peaks. The test organisms that were used in the study to assess the Antimicrobial activity of sericin were Escherichia coli and Staphylococcus aureus according to AATCC standard. The Antimicrobial activity of the sericin thus extracted was assessed by both qualitative (agar diffusion and parallel streak method) and quantitative (percentage reduction test) methods. An inhibition zone of 28 mm and 30 mm for E. coli and S. aureus by agar diffusion method and a zone of 40 mm and 42 mm for E. coli and S. aureus by parallel streak method were obtained. Quantitative assessment by percentage reduction test showed a reduction percentage of 89.4% and 81% for S. aureus and E....
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investigation on the effect of rf air plasma and neem leaf extract treatment on the surface modification and Antimicrobial activity of cotton fabric
Applied Surface Science, 2008Co-Authors: K Vaideki, S Jayakumar, R Rajendran, G. ThilagavathiAbstract:A thorough investigation on the Antimicrobial activity of RF air plasma and azadirachtin (neem leaf extract) treated cotton fabric has been dealt with in this paper. The cotton fabric was given a RF air plasma treatment to improve its hydrophilicity. The process parameters such as electrode gap, time of exposure and RF power have been varied to study their effect in improving the hydrophilicity of the cotton fabric and they were optimized based on the static immersion test results. The neem leaf extract (azadirachtin) was applied on fabric samples to impart Antimicrobial activity. The Antimicrobial efficacy of the samples have been analysed and compared with the efficacy of the cotton fabric treated with the Antimicrobial Finish alone. The investigation reveals that the RF air plasma has modified the surface of the fabric, which in turn increased the Antimicrobial activity of the fabric when treated with azadirachtin. The surface modification due to RF air plasma treatment has been analysed by comparing the FTIR spectra of the untreated and plasma treated samples. The molecular interaction between the fabric, azadirachtin and citric acid which was used as a cross linking agent to increase the durability of the Antimicrobial Finish has also been analysed using FTIR spectra.
K Vaideki - One of the best experts on this subject based on the ideXlab platform.
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investigation on the effect of rf air plasma and neem leaf extract treatment on the surface modification and Antimicrobial activity of cotton fabric
Applied Surface Science, 2008Co-Authors: K Vaideki, S Jayakumar, R Rajendran, G. ThilagavathiAbstract:A thorough investigation on the Antimicrobial activity of RF air plasma and azadirachtin (neem leaf extract) treated cotton fabric has been dealt with in this paper. The cotton fabric was given a RF air plasma treatment to improve its hydrophilicity. The process parameters such as electrode gap, time of exposure and RF power have been varied to study their effect in improving the hydrophilicity of the cotton fabric and they were optimized based on the static immersion test results. The neem leaf extract (azadirachtin) was applied on fabric samples to impart Antimicrobial activity. The Antimicrobial efficacy of the samples have been analysed and compared with the efficacy of the cotton fabric treated with the Antimicrobial Finish alone. The investigation reveals that the RF air plasma has modified the surface of the fabric, which in turn increased the Antimicrobial activity of the fabric when treated with azadirachtin. The surface modification due to RF air plasma treatment has been analysed by comparing the FTIR spectra of the untreated and plasma treated samples. The molecular interaction between the fabric, azadirachtin and citric acid which was used as a cross linking agent to increase the durability of the Antimicrobial Finish has also been analysed using FTIR spectra.
Krishnaveni Vasudevan - One of the best experts on this subject based on the ideXlab platform.
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Study of Antibacterial Activity of Chitosan on Lyocell and Recycled Polyester Yarns
2014Co-Authors: Saranya Rajamanickam, Krishnaveni VasudevanAbstract:Medical textiles are one of the essential materials for the production of medical garments and have been developed in the past decades. A medical textile is a type of advanced technical textile materials and is classified according to its performance and functional properties as being suitable for medical or hygienic products. Among the vast categories of medical textile products, the hospital textiles are most important and also expected to fulfill the hygienic, comfort and microbial resistance property requirements. The functional requirements of hospital textiles have led to the innovative use of a variety of natural and manmade fibers with enhanced comfort and hygienic properties in the development of new products for medical textiles. The lyocell and polyester fabrics play an important role in the hospital textiles. The new innovation of Antimicrobial Finishes on the fabric can minimize the transfer of micro- organisms on the wearer by creating as a physical barrier. Chitosan is a natural biopolymer and it has unique properties such as biodegradability, non-toxicity and Antimicrobial activity. This work is an attempt to develop hospital textiles using lyocell and Recycled polyester fibers. The fibers were converted in to different composition of yarns such as 100% Lyocell, 100% Recycled polyester, 50:50 and 70:30 Lyocell/ Recycled polyester blended yarns using short staple spinning system. The 30sNe counts of yarns were developed in each composition and the chitosan Antimicrobial Finish was coated on the blended yarns using pad dry cure method. The fibre and Finished yarn samples were tested for fibre length, denier, yarn tenacity, yarn evenness and Antimicrobial properties. The effects of Antimicrobial activity of the chitosan Finished yarns were assessed by standard AATCC 147 test method. The different blended yarns test results showed an higher strength and elongation and better Antimicrobial activity.
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Study of Antibacterial Activity of Chitosan onLyocell and Recycled Polyester Yarns
International Journal of Innovative Research in Science Engineering and Technology, 2014Co-Authors: Saranya Rajamanickam, Krishnaveni VasudevanAbstract:Medical textiles are one of the essential materials for the production of medical garments and have been developed in the past decades. A medical textile is a type of advanced technical textile materials and is classified according to its performance and functional properties as being suitable for medical or hygienic products. Among the vast categories of medical textile products, the hospital textiles are most important and also expected to fulfill the hygienic, comfort and microbial resistance property requirements. The functional requirements of hospital textiles have led to the innovative use of a variety of natural and manmade fibers with enhanced comfort and hygienic properties in the development of new products for medical textiles. The lyocell and polyester fabrics play an important role in the hospital textiles. The new innovation of Antimicrobial Finishes on the fabric can minimize the transfer of microorganisms on the wearer by creating as a physical barrier. Chitosan is a natural biopolymer and it has unique properties such as biodegradability, non-toxicity and Antimicrobial activity. This work is an attempt to develop hospital textiles using lyocell and Recycled polyester fibers. The fibers were converted in to different composition of yarns such as 100% Lyocell, 100% Recycled polyester, 50:50 and 70:30 Lyocell/ Recycled polyester blended yarns using short staple spinning system. The 30sNe counts of yarns were developed in each composition and the chitosan Antimicrobial Finish was coated on the blended yarns using pad dry cure method. The fibre and Finished yarn samples were tested for fibre length, denier, yarn tenacity, yarn evenness and Antimicrobial properties. The effects of Antimicrobial activity of the chitosan Finished yarns were assessed by standard AATCC 147 test method. The different blended yarns test results showed an higher strength and elongation and better Antimicrobial activity.
Faouzi Sakli - One of the best experts on this subject based on the ideXlab platform.
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Development, characterization, and biological assessment of biocompatible cellulosic wound dressing grafted Aloe vera bioactive polysaccharide
Cellulose, 2019Co-Authors: Fatma Salah, Yassine El Ghoul, Fahad Alminderej, Emna El Golli-bennour, Zouhour Ouanes, Olek Maciejak, Nathalie Jarroux, Hatem Majdoub, Faouzi SakliAbstract:In order to improve healthcare of injured people, deacetylated acemannan extracted from Aloe vera leaves, having high inhibitory properties, was used as an Antimicrobial Finish on traditional cotton items. Response surface methodology was employed to define quadratic relationships between the polysaccharide grafting degree and the treatment process properties. An optimized modification process, offering the highest funtionalization degree, is obtained. The cellulosic fiber morphology and roughness modifications induced by polymer grafting are revealed using Atomic Force Microscopy and Scanning Electron Microscopy. Infra Red spectroscopy was used to confirm the grafting effectiveness. Thermogravimetric Analysis and Differential Scanning Calorimeter were further employed to confirm chemical modification. Considering the potential use of this new biomaterial, original properties were also studied. Finishing treatment seems to preserve mechanical properties, and hydrophilicity of the cellulosic substrate. MTT assay were done in HepG2 cells to ensure that the obtained dressings are non-toxic. The biomaterial showed high biocompatibility and promoted cell viability. Antimicrobial studies showed that grafting treatment conserved polymer antibacterial activity. Optimized cotton dressings exhibited a significant inhibitory effect against Staphylococcus aureus and Escherichia coli bacteria, killed respectively at 70.2% and 72.4%.
