Biocidal polymers (I): Preparation and biological activity of some novel biocidal polymers based on uramil and its azo-dyes

Ahmed, Abd El-Shafey I.; Hay, J. N.; Bushell, Michael E.; Wardell, J. N.; Cavalli, Gabriel

doi:10.1016/j.reactfunctpolym.2007.09.004

Cited by 55 publications

(40 citation statements)

References 34 publications

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“…N-halamines can be applied to various textile surfaces including cellulose [25][26][27], polyamide [28] and polyester [29] fibers. To increase their effectiveness and the durability of the antimicrobial finish [25], research has been oriented toward synthesis of N-halamide monomers with an incorporated vinyl reactive group ( Figure 3) [30,31] that can polymerize on cellulose fibers under appropriate conditions to form a coating with excellent durability after washing [30]. …”

Section: N-halaminesmentioning

confidence: 99%

Antibacterial Modification of Textiles Using Nanotechnology

Fouda¹

2012

A Search for Antibacterial Agents

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Section: N-halaminesmentioning

confidence: 99%

Antibacterial Modification of Textiles Using Nanotechnology

Fouda¹

2012

A Search for Antibacterial Agents

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“…The product was filtered, washed with 100 ml distilled water, and dried (6). The amount of halogen loaded on the polymer was determined by using iodometric titration, at 115 Ϯ 20 ppm (2,22).…”

Section: Materials M-phenylenediaminementioning

confidence: 99%

“…Polymer 2 (1 g) was soaked in 20 ml sodium hypochlorite (7.5%, wt/wt) overnight. The polymer was filtered, washed with distilled water (100 ml), and dried at 45°C for 24 h. The amount of halogen on the polymer was determined by using iodometric titration (2,22). The polymer was heated in 20 ml sodium thiosulfate (0.01 M) at 45°C for 1 h and then filtered, washed with halogen-free water, and dried at 45°C for 24 h. The polymer was rehalogenated using sodium hypochlorite, and the halogen was then removed with sodium thiosulfate (the process was repeated four times, charging with halogen and then discharging with sodium thiosulfate), and in each case, the amount of halogen loaded onto the polymer was determined.…”

Section: Materials M-phenylenediaminementioning

confidence: 99%

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New Approach To Produce Water Free of Bacteria, Viruses, and Halogens in a Recyclable System

Ahmed

Cavalli

Bushell

et al. 2011

Appl Environ Microbiol

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The antimicrobial activity of a new cross-linked N-halamine polymer against bacteria and viruses was evaluated. The polymer achieved a 9-log 10 reduction of bacteria (both Escherichia coli and Staphylococcus aureus) in 1.5 h and a 5-log 10 reduction of bacteriophage PRD1 in 3 h. At the same time, the ability of the nonhalogenated polymer to trap halide ions was examined. The polymer was incorporated into a multifiltration system to study the ability to produce water free of bacteria, viruses, and halide ions. The antimicrobial activity, useful lifetime, halide ion level, and recycling possibilities of the system were quantified on a laboratory scale. A design for a large-scale multifiltration system based on this polymer is proposed.The latest report from the WHO and UNICEF Joint Monitoring Programme shows that the world is on track to meet goal 7, target 7c, of the millennium development goals (MDGs) (21) with respect to access to improved water supplies. Nevertheless, despite the progress that has been made during the last 10 years, over 850 million people do not have access to improved sources of drinking water, with almost all of them living in developing regions. In Europe most people are connected to a piped water supply managed by a water utility. The remainder, around 10% of the population, receive their water from small, or very small, private water supplies (17). A recent survey of the microbiological quality of water from private water supplies in the United Kingdom has shown that just over one-third show evidence of fecal contamination and, by projection, that 54% of all such supplies are likely to be unsatisfactory (17).

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“…Two methods can be used for this purpose: impregnation of the antibacterial agent on the polymeric support or chemical modification of the polymer [1][2][3][4][5][6][7][8][9][10] . Alternatively, monomers containing the bactericidal groups can be polymerized and subsequently cross-linked to obtain a biocidal polymer [9,[11][12][13] . Although polymerization of functionalized monomers is a more direct route to prepare biocidal polymers, these functionalized monomers are expensive and it is hard to obtain spherical beads with controlled morphology.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Bactericidal Action of 2-vinylpiridine Copolymers Containing Quaternary Ammonium Groups and Their Charge Transfer Complexes

Valle¹,

Marques²,

Costa³

et al. 2013

Polímeros

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Abstract:We report the development of copolymers based on 2-vinylpyridine with different porosity degrees. The copolymers were quaternized with methyl iodide and acrylonitrile to introduce quaternary ammonium groups on pyridine units. To prepare charge transfer complexes, the unmodified copolymers and their derivatives quaternized were impregnated with iodine. The antibacterial properties of all the polymers were evaluated ranging from of the Escherichia coli strain. The unmodified copolymers did not have antibacterial activity against E.Coli suspensions. The quaternization with methyl iodine and acrylonitrile increased the biocidal performance of these copolymers, but only the copolymer with the lowest porosity modified with methyl iodine showed significant bactericidal action for all E. Coli concentrations. The 2-vinylpiridine copolymers quaternized and impregnated with iodine had higher antibacterial activity than the impregnated ones. The charge transfer complexes derived from the copolymer with the lowest porosity and highest swelling capacity in water had the best bactericidal performance.

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Biocidal polymers (I): Preparation and biological activity of some novel biocidal polymers based on uramil and its azo-dyes

Cited by 55 publications

References 34 publications

Antibacterial Modification of Textiles Using Nanotechnology

Antibacterial Modification of Textiles Using Nanotechnology

New Approach To Produce Water Free of Bacteria, Viruses, and Halogens in a Recyclable System

Evaluation of Bactericidal Action of 2-vinylpiridine Copolymers Containing Quaternary Ammonium Groups and Their Charge Transfer Complexes

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