The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Gang Sun - One of the best experts on this subject based on the ideXlab platform.
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Antimicrobial Finishing of cellulose with incorporation of aminopyridinium salts to reactive and direct dyed fabrics
Journal of Applied Polymer Science, 2007Co-Authors: Tao Zhao, Gang SunAbstract:Three quaternary ammonium salts namely 4-amino-laurylpyridinium chloride, 4-benzoylamino-1-dodecylpyridinium bromide, and 4-(1-naphthoyl) amino-1-dodecylpyridinium bromide were employed in Antimicrobial Finishing of dyed and undyed cotton fabrics. The intermolecular interactions between the dyes and the aminopyridinium salts, and their impact on the exhaustions of salts on the dyed fabrics were discussed. The quaternary ammonium salts could form ionic interactions with sulfonate groups on the dyed cotton fibers, which contribute to higher exhaustion uptakes of the salts and better Antimicrobial activities against Escherichia coli of the dyed cotton fabrics compared with that of the undyed sample. However, the washing durability of the Antimicrobial functions on the finished cotton fabrics was still low because of easy dissociation of the ionic interactions in water. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007
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Antimicrobial Finishing of wool fabrics with quaternary aminopyridinium salts
Journal of Applied Polymer Science, 2006Co-Authors: Tao Zhao, Gang SunAbstract:Quaternary aminopyridinium salts were employed in Antimicrobial Finishing wool fabrics. The effects of alkyl chain length in the salts, pH conditions of Finishing baths, Finishing time and temperature, and salt concentrations were investigated. The incorporated quaternary aminopyridinium salt molecules on wool were characterized by FTIR. The quaternary ammonium salt could form ionic interactions with anionic groups on wool, which contribute to the durable Antimicrobial functions. All the finished wool fabrics exhibited Antimicrobial efficacy against Escherichia coli. The washing durability of Antimicrobial functions on the finished wool fabrics was also studied. ©2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 482–486, 2007
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Antimicrobial Finishing of acrilan fabrics with cetylpyridinium chloride : Affected properties and structures
Journal of Applied Polymer Science, 2005Co-Authors: Zaisheng Cai, Gang SunAbstract:Durable Antimicrobial acrilan fabrics were prepared by using cetylpyridinium chloride (CPC) in a chemical Finishing process. The CPC could form ionic interactions with anionic groups on acrilan fibers, which contribute to durable Antimicrobial functions. Reaction conditions such as pH, temperature, and time of the chemical treatment affected exhaustion of CPC and Antimicrobial properties. However, the pH conditions of the Finishing bath also impacted mechanical properties and color of the fabrics, particularly under alkaline conditions. Although a more alkaline condition is preferred for durable Antimicrobial functions, high pH reduces tensile strength and results in yellowing of acrilan fibers. The yellowing of the acrilan fibers is caused by the hydrolysis of acrylonitrle groups and induced formation of conjugated CN systems in the polymers. The conjugated systems were characterized by FTIR. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1227–1236, 2005
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Chemistry of Durable and Regenerable Biocidal Textiles
Journal of Chemical Education, 2005Co-Authors: Gang Sun, S. Dave WorleyAbstract:Unlike the widely used slow-releasing biocidal mechanism now employed in biocidal textiles, a novel regenerable process, based on a regeneration principle and halamine chemistry, has been developed in Antimicrobial Finishing of textiles. Halamine-modified textile materials demonstrate durable and regenerable Antimicrobial functions and execute rapid inactivation of a broad spectrum of microorganisms by contact without yielding drug resistance. The unique properties of the products render them useful materials for medical-use and hygienic textiles. The chemistry of the biocidal materials is be discussed.
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Antimicrobial cationic dyes. Part 3: simultaneous dyeing and Antimicrobial Finishing of acrylic fabrics
Dyes and Pigments, 2005Co-Authors: Gang SunAbstract:The Antimicrobial cationic dyes were employed in dyeing acrylic fabrics. The effects of dyeing time, dyeing concentration and dyeing temperature were investigated, and the incorporated dye molecules on acrylics were analyzed. It was found that these functional dyes could be effectively introduced to acrylic fibers to achieve simultaneous coloration and functional Finishing effects. All the treated fabrics exhibited Antimicrobial efficacy against Escherichia coli and Staphylococcus aureus. The washing durability of Antimicrobial functions on the treated fabrics was further studied.
Aharon Gedanken - One of the best experts on this subject based on the ideXlab platform.
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Chapter 3 – Making the hospital a safer place by the sonochemical coating of textiles by antibacterial nanoparticles
Surface Chemistry of Nanobiomaterials, 2016Co-Authors: Ilana Perelshtein, Nina Perkas, Aharon GedankenAbstract:With increasing population the bacterial infection problems increased dramatically worldwide and affected the markets for Antimicrobial products. Clothing and textile materials are good media for growth of microorganisms such as bacteria and fungi. Antimicrobial Finishing of textiles protects users from pathogenic or odor-generating microorganisms, which can cause medical and hygienic problems, and protects textiles from undesirable esthetic changes or damage caused by rotting, which can result in reduced functionality. As a consequence of their importance, the number of different Antimicrobial agents suitable for textile application increased dramatically in the market.
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a one step process for the Antimicrobial Finishing of textiles with crystalline tio2 nanoparticles
Chemistry: A European Journal, 2012Co-Authors: Ilana Perelshtein, Nina Perkas, Guy Applerot, Judith Grinblat, Aharon GedankenAbstract:Titanium oxide (TiO(2)) nanoparticles (NPs) in their two forms, anatase and rutile, were synthesized and deposited onto the surface of cotton fabrics by using ultrasonic irradiation. The structure and morphology of the nanoparticles were analyzed by using characterization methods such as XRD, TEM, STEM, and EDS. The Antimicrobial activities of the TiO(2)-cotton composites were tested against Escherichia coli (gram-negative) and Staphylococcus aureus (gram-positive) strains, as well as against Candida albicans. Significant Antimicrobial effect was observed, mainly against Staphylococcus aureus. In addition, the combination of visible light and TiO(2) NPs showed enhanced Antimicrobial activity.
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A One‐Step Process for the Antimicrobial Finishing of Textiles with Crystalline TiO2 Nanoparticles
Chemistry (Weinheim an der Bergstrasse Germany), 2012Co-Authors: Ilana Perelshtein, Nina Perkas, Guy Applerot, Judith Grinblat, Aharon GedankenAbstract:Titanium oxide (TiO(2)) nanoparticles (NPs) in their two forms, anatase and rutile, were synthesized and deposited onto the surface of cotton fabrics by using ultrasonic irradiation. The structure and morphology of the nanoparticles were analyzed by using characterization methods such as XRD, TEM, STEM, and EDS. The Antimicrobial activities of the TiO(2)-cotton composites were tested against Escherichia coli (gram-negative) and Staphylococcus aureus (gram-positive) strains, as well as against Candida albicans. Significant Antimicrobial effect was observed, mainly against Staphylococcus aureus. In addition, the combination of visible light and TiO(2) NPs showed enhanced Antimicrobial activity.
Ali M. Elshafei - One of the best experts on this subject based on the ideXlab platform.
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biosynthesized silver nanoparticles by aspergillus terreus nrrl265 for imparting durable Antimicrobial Finishing to polyester cotton blended fabric statistical optimization characterization and antitumor activity evaluation
Biocatalysis and agricultural biotechnology, 2021Co-Authors: Abdelmageed M. Othman, Naser Gad Albalakocy, Maysa A. Elsayed, Mohamed M. Hassan, Ali M. ElshafeiAbstract:Abstract In the current study, the conditions that influence the biosynthesis of silver nanoparticles (AgNPs) by A. terreus NRRL265 cell free filtrate (CFF) were first considered through the “one factor per time” ordinary strategy. At that point a response surface methodology (RSM) was built to study and identify the interdependence between the efficient factors that influence the biosynthesis of AgNPs, utilizing the central composite design (CCD) procedure. Sphere shaped AgNPs in a range between 13 and 49 nm were detected via electron microscopy approaches. The spectroscopy of Fourier Transform Infrared (FTIR) suggested the contribution of peptides as a reducing and capping tool. The viability of AgNPs like an Antimicrobial factor was set up by means of its capacity to apply a significant Antimicrobial action in opposition to Candida albicans, Bacillus mycoides, and Escherichia coli. Human Caucasian breast adenocarcinoma (MCF7) tumor cells showed a direct dose–response relationship with AgNPs to give an IC50 value of 46.7 μg/ml. AgNP deposition on a polyester cotton blended fabric surface was detected as a thin reliable surface layer through checking scanning electron microscopy (SEM). In spite of the presence of little amounts of silver on the treated fabrics as demonstrated by EDX analysis profile, the fabrics treated with AgNPs were capable to restrain the tested microorganism’s growth.
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Biosynthesis and characterization of silver nanoparticles induced by fungal proteins and its application in different biological activities
Journal of Genetic Engineering and Biotechnology, 2019Co-Authors: Abdelmageed M. Othman, Naser Gad Al-balakocy, Maysa A. Elsayed, Mohamed M. Hassan, Ali M. ElshafeiAbstract:Background The present study aims to apply an efficient eco-friendly and inexpensive process for green synthesis of silver nanoparticles (AgNPs) through the mediation of fungal proteins from Aspergillus fumigatus DSM819, characterization, and its application as Antimicrobial Finishing agent in textile fabrics against some infectious microorganisms. Results Optimum conditions for AgNP biosynthesis could be achieved by means of using 60% (v/v) of cell-free filtrate (CFF) and 1.5 mM of AgNO_3 at pH 10.0 after 90 min. The obtained AgNPs were of spherical shape with 90% of distribution below than 84.4 nm. The biosynthesized AgNPs exerted an Antimicrobial activity against the studied pathogenic microorganisms ( E. coli , B. mycoides , and C. albicans ). In addition, IC_50 values against in vitro tumor cell lines were found to be 31.1, 45.4, 40.9, and 33.5 μg/ml for HCT116, A549, MCF7, and PC3, respectively. Even with a very low concentration (0.25%), the treated PET/C fabrics by AgNPs exerted an Antimicrobial activity against E. coli , B. mycoides , and C. albicans to give inhibition zone diameter of 15, 15, and 16 mm, respectively. Conclusions The green biosynthesis approach applied in this study is a non-toxic alternative to the traditional chemical and physical methods, and would be appropriate for biological large-scale production and prospective treatments. Graphical abstract
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Antimicrobial Finishing of regular and modified nylon‐6 fabrics
Journal of Applied Polymer Science, 2008Co-Authors: Samy Elsebaie Shalaby, Naser Gad Al-balakocy, Osama Mohamed Abdel-fatah, Ali M. ElshafeiAbstract:A simple, efficient, and practically applicable functional approach for improvement Antimicrobial properties of nylon-6 fabrics and increase the washing durability of biofunctions was developed. This Finishing approach is based on grafting of the fabrics with methacrylic acid (MAA) to create additional carboxylic groups in nylon-6 macromolecules, followed by subsequent reaction with dimethylalklbenzyl ammonium chloride (DMABAC) solution under alkaline conditions. The carboxylic groups react with cationic agent through ionic interaction, which led to the immobilization of QAS on nylon-6 fabrics. This immobilization was proofed through determination of nitrogen content, applying scanning electron microscopy (SEM), and FTIR microscopy. The effect of treatment conditions on salt uptake (SUT) on nylon-6 fabrics and reaction efficiency (RE) was investigated. The Antimicrobial assessment of regular and grafted with PMAA nylon-6 fabrics treated with DMABAC revealed that both types of fabrics are characterized before washing, by quite strong biocide effect on Bacillus mycoides, Escherichia coli and Candida albicans. The role of grafting nylon-6 fabrics before treatment with salt on durability of Antimicrobial functions seems to be more significant as the samples were repeatedly washed. Even after Laundring 10 times the grafted samples could still provide 80%, 100%, and 87.5% microbial reduction against B. mycoides, E. coli and C. albicans, respectively, in contrast with 42.6%, 65.6%, and 42.5% in case of regular nylon-6 fabrics. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008.
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Antimicrobial Finishing of regular and modified nylon 6 fabrics
Journal of Applied Polymer Science, 2008Co-Authors: Samy Elsebaie Shalaby, Naser Gad Albalakocy, O M Abdelfatah, Ali M. ElshafeiAbstract:A simple, efficient, and practically applicable functional approach for improvement Antimicrobial properties of nylon-6 fabrics and increase the washing durability of biofunctions was developed. This Finishing approach is based on grafting of the fabrics with methacrylic acid (MAA) to create additional carboxylic groups in nylon-6 macromolecules, followed by subsequent reaction with dimethylalklbenzyl ammonium chloride (DMABAC) solution under alkaline conditions. The carboxylic groups react with cationic agent through ionic interaction, which led to the immobilization of QAS on nylon-6 fabrics. This immobilization was proofed through determination of nitrogen content, applying scanning electron microscopy (SEM), and FTIR microscopy. The effect of treatment conditions on salt uptake (SUT) on nylon-6 fabrics and reaction efficiency (RE) was investigated. The Antimicrobial assessment of regular and grafted with PMAA nylon-6 fabrics treated with DMABAC revealed that both types of fabrics are characterized before washing, by quite strong biocide effect on Bacillus mycoides, Escherichia coli and Candida albicans. The role of grafting nylon-6 fabrics before treatment with salt on durability of Antimicrobial functions seems to be more significant as the samples were repeatedly washed. Even after Laundring 10 times the grafted samples could still provide 80%, 100%, and 87.5% microbial reduction against B. mycoides, E. coli and C. albicans, respectively, in contrast with 42.6%, 65.6%, and 42.5% in case of regular nylon-6 fabrics. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008.
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Antimicrobial Finishing of regular and modified polyethylene terephthalate fabrics
Journal of Applied Polymer Science, 2008Co-Authors: Samy Elsebaie Shalaby, Naser Gad Al-balakocy, Osama Mohamed Abdel-fatah, M. K. Beliakova, Ali M. ElshafeiAbstract:An effective two-stage method has been developed for imparting Antimicrobial properties to regular polyethylene terephthalate (R-PET), polyethylene glycol modified polyethylene terephthalate (PEG-M-PET), R-PET/Cotton blend (R-PET/C) and PEG-M-PET/Cotton blend (PEG-M-PET/C) fabrics. The method consists of partial hydrolysis of the fabrics to create carboxylic groups in PET macromolecules followed by subsequent reaction with dimethylalkylbenzyl ammonium chloride (DMABAC) under alkaline conditions. The reaction conditions such as pH, reaction temperature and time, carboxylic content, and DMABAC concentration were studied. Characterization of the finished fabrics was carried out through scanning electron microscopy (SEM) and Fourier transform infrared spectra (FTIR). All the modified PET fabrics showed excellent antibacterial activity towards Gram-positive (Bacillus mycoides), Gram-negative (Escherichia coli), and nonfilamentous fungus (Candida albicans). The achieved Antimicrobial functions on the PET fabrics are durable in repeated laundering processes. Even after laundering 10 times the fabrics could still provide more than 85% of its Antimicrobial activity against B. mycoides, E. coli, and C. albicans. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Ilana Perelshtein - One of the best experts on this subject based on the ideXlab platform.
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Chapter 3 – Making the hospital a safer place by the sonochemical coating of textiles by antibacterial nanoparticles
Surface Chemistry of Nanobiomaterials, 2016Co-Authors: Ilana Perelshtein, Nina Perkas, Aharon GedankenAbstract:With increasing population the bacterial infection problems increased dramatically worldwide and affected the markets for Antimicrobial products. Clothing and textile materials are good media for growth of microorganisms such as bacteria and fungi. Antimicrobial Finishing of textiles protects users from pathogenic or odor-generating microorganisms, which can cause medical and hygienic problems, and protects textiles from undesirable esthetic changes or damage caused by rotting, which can result in reduced functionality. As a consequence of their importance, the number of different Antimicrobial agents suitable for textile application increased dramatically in the market.
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a one step process for the Antimicrobial Finishing of textiles with crystalline tio2 nanoparticles
Chemistry: A European Journal, 2012Co-Authors: Ilana Perelshtein, Nina Perkas, Guy Applerot, Judith Grinblat, Aharon GedankenAbstract:Titanium oxide (TiO(2)) nanoparticles (NPs) in their two forms, anatase and rutile, were synthesized and deposited onto the surface of cotton fabrics by using ultrasonic irradiation. The structure and morphology of the nanoparticles were analyzed by using characterization methods such as XRD, TEM, STEM, and EDS. The Antimicrobial activities of the TiO(2)-cotton composites were tested against Escherichia coli (gram-negative) and Staphylococcus aureus (gram-positive) strains, as well as against Candida albicans. Significant Antimicrobial effect was observed, mainly against Staphylococcus aureus. In addition, the combination of visible light and TiO(2) NPs showed enhanced Antimicrobial activity.
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A One‐Step Process for the Antimicrobial Finishing of Textiles with Crystalline TiO2 Nanoparticles
Chemistry (Weinheim an der Bergstrasse Germany), 2012Co-Authors: Ilana Perelshtein, Nina Perkas, Guy Applerot, Judith Grinblat, Aharon GedankenAbstract:Titanium oxide (TiO(2)) nanoparticles (NPs) in their two forms, anatase and rutile, were synthesized and deposited onto the surface of cotton fabrics by using ultrasonic irradiation. The structure and morphology of the nanoparticles were analyzed by using characterization methods such as XRD, TEM, STEM, and EDS. The Antimicrobial activities of the TiO(2)-cotton composites were tested against Escherichia coli (gram-negative) and Staphylococcus aureus (gram-positive) strains, as well as against Candida albicans. Significant Antimicrobial effect was observed, mainly against Staphylococcus aureus. In addition, the combination of visible light and TiO(2) NPs showed enhanced Antimicrobial activity.
Jinjin Dai - One of the best experts on this subject based on the ideXlab platform.
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Antimicrobial Finishing of cotton textile based on water glass by sol gel method
Journal of Sol-Gel Science and Technology, 2007Co-Authors: Yanjun Xing, Xiaojun Yang, Jinjin DaiAbstract:A low temperature and cost-effective process for Antimicrobial Finishing of cotton textiles has been developed by sol–gel method. The Antimicrobial treatment was performed by treating cotton textile with silica sols from water glass and then with silver nitrate solution. The Antimicrobial activity was determined by using E. coli as a model for Gram-negative bacteria. The results showed that the treated textile has an excellent Antimicrobial effect and laundering durability. SEM analysis showed coarse surface morphological change on the water glass treated cotton textile. The residual concentration of silver ion on fabrics was informed by ICP-MS. XPS results indicated that two different states of silver were present on the surface of the Antimicrobial textile.
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Antimicrobial Finishing of cotton textile based on water glass by sol–gel method
Journal of Sol-Gel Science and Technology, 2007Co-Authors: Yanjun Xing, Xiaojun Yang, Jinjin DaiAbstract:A low temperature and cost-effective process for Antimicrobial Finishing of cotton textiles has been developed by sol–gel method. The Antimicrobial treatment was performed by treating cotton textile with silica sols from water glass and then with silver nitrate solution. The Antimicrobial activity was determined by using E. coli as a model for Gram-negative bacteria. The results showed that the treated textile has an excellent Antimicrobial effect and laundering durability. SEM analysis showed coarse surface morphological change on the water glass treated cotton textile. The residual concentration of silver ion on fabrics was informed by ICP-MS. XPS results indicated that two different states of silver were present on the surface of the Antimicrobial textile.