Biocidal polymers active by contact. IV. Polyurethanes based on polysiloxanes with pendant primary alcohols and quaternary ammonium groups

Hazziza-Laskar, J.; Hélary, G.; Sauvet, G.

doi:10.1002/app.1995.070580108

Cited by 79 publications

(58 citation statements)

References 14 publications

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“…20 In both cases, a very high biocidal activity and a fairly good permanency in water were observed, and interpreted as an intrinsic surface property of the polymer films being able to kill bacteria by a direct contact between the solid film and the bacteria cells.…”

Section: Introductionmentioning

confidence: 96%

Biocidal polymers active by contact. V. Synthesis of polysiloxanes with biocidal activity

Sauvet¹,

Dupond²,

Kaźmierski

et al. 2000

J. Appl. Polym. Sci.

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136

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Polysiloxanes with 3-(alkyldimethylammonio)propyl pendant groups were synthesized by quaternization of n-octyldimethylamine or n-dodecyldimethylamine with linear polysiloxanes containing 3-chloropropyl groups and/or 3-bromopropyl groups attached to silicon atoms. The precursor polysiloxanes, poly[(3-chloropropyl)-methylsiloxane] homopolymer and various copolymers containing (3-halogenopropyl)-methylsiloxane and dimethylsiloxane units, were obtained by equilibrium cationic polymerization of linear and cyclic siloxanes with (3-halogenopropyl)methylsiloxane units. The polysiloxanes bearing quaternary ammonium salts (QAS) showed bactericidal activity against bacteria such as Escherichia coli and Aeromonas hydrophila when incorporated in a polysiloxane network. The activity was retained after 66 days of immersion in water. The QAS-containing polysiloxanes are also active in aqueous solution.

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Section: Introductionmentioning

confidence: 96%

Biocidal polymers active by contact. V. Synthesis of polysiloxanes with biocidal activity

Sauvet¹,

Dupond²,

Kaźmierski

et al. 2000

J. Appl. Polym. Sci.

Self Cite

136

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“…The strong biocidal potency of these polymers is a result of the high local concentration of active groups [1][2][3][4][5][6][7]. Salts of organic cations such as quaternary ammonium [8][9][10][11][12][13][14][15], quaternary phosphonium [15][16][17], N-alkylpyridinium [18][19][20], N-alkylimidazolium [21,22], guanidynium [23] and organosulphonium [24] are the most commonly employed biocidal functionalites to be attached to polymers.…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Siloxane Statistical and Graft Copolymers Substituted with t-Butylamine and t-Butylammonium Biocidal Functions

Mizerska

Fortuniak

Chojnowski

et al. 2010

J Inorg Organomet Polym

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Two kinds of new biocidal siloxane copolymers were synthesized, poly-[3(t-butylamino)propyl]methylsiloxane-co-(3-chloropropyl)methylsiloxane] and poly [dimethylsiloxane-co-(3-mercaptopropyl)methylsiloxane]-g-poly-2(t-butylamino)ethyl methacrylate]. Water-soluble derivatives of these copolymers, having charged ammonium groups, were also obtained. The copolymers were tested against two Gram-positive and three Gram-negative bacterial strains. The antibacterial tests for the water-soluble copolymers with charged ammonium groups were performed in aqueous solutions. Both these copolymers were active against the Gram-positive bacterial strains and inactive or moderately active against Gram-negative bacteria. The uncharged, insoluble, t-butylamine substituted copolymers were tested using a two-phase water-copolymer system. In this test both copolymers having the uncharged tbutylamine functions showed a high biocidal potency against the bacteria studied including those Gram-negative ones.

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“…Other methods for activating surfaces for the subsequent attachment of QA species such as oxidative plasma treatment would be too damaging to the thin polyamide layer of an RO membrane and would have a detrimental effect on the performance of the membrane [Cen et al, 2003;Rieser et al, 1997]. A series of polyurethane coatings with pendant QA groups has been reported to show excellent biocidal activity and durability in water although the passage of water through these coatings is not reported and the required curing conditions could be damaging to a potential RO substrate [Nurdin et al, 1993;Hazziza-Laskar et al, 1995].…”

Section: Introductionmentioning

confidence: 99%

Analysis of micromixers and biocidal coatings on water-treatment membranes to minimize biofouling.

Webb¹,

James

Hibbs³

et al. 2009

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Biofouling, the unwanted growth of biofilms on a surface, of water-treatment membranes negatively impacts in desalination and water treatment. With biofouling there is a decrease in permeate production, degradation of permeate water quality, and an increase in energy expenditure due to increased cross-flow pressure needed. To date, a universal successful and cost-effect method for controlling biofouling has not been implemented. The overall goal of the work described in this report was to use high-performance computing to direct polymer, material, and biological research to create the next generation of water-treatment membranes. Both physical (micromixers -UV-curable epoxy traces printed on the surface of a watertreatment membrane that promote chaotic mixing) and chemical (quaternary ammonium groups) modifications of the membranes for the purpose of increasing resistance to biofouling were evaluated. Creation of low-cost, efficient water-treatment membranes helps assure the availability of fresh water for human use, a growing need in both the U. S. and the world. 3 EXECUTIVE SUMMARYSection 1: Biofouling, the unwanted growth of biofilms on a surface, of water-treatment membranes has a negative economic impact in desalination and water treatment. With biofouling there is a decrease in permeate production and an increase in energy expenditure due to increased cross-flow pressure needed. Biofouling leads to increased cleaning expenditures, it accelerates the degradation of the membranes, and degrades the water quality of the permeate. To date, a universal successful and cost-effect method for controlling biofouling has not been implemented. The goal of this project is to use high-performance computing to direct polymer, material, and biological research to create the next generation of water-treatment membranes. Both physical (micromixers -UV-curable epoxy traces printed on the surface of a watertreatment membrane that promote chaotic mixing) and chemical (quaternary ammonium groups) modifications of the membranes for the purpose of increasing resistance to biofouling were evaluated.Section 2: Features (micromixers) that promote chaotic mixing were fabricated on reverseosmosis membrane surfaces and evaluated using computational models and laboratory experiments to determine their effectiveness in reducing biofouling. Computational fluid dynamics models of membrane feed channels were developed using different patterns of micromixers on the membrane surface. The shear-stress distribution along the membrane surface was simulated for steady flows along the different micromixer configurations. In addition, the hypothetical mass transfer of a tracer from the membrane surface was used as a metric to compare the amount of scouring and mixing in configurations with and without micromixers. Epoxy micromixers were printed directly onto membrane surfaces, and different patterns were evaluated experimentally. Fluorescence hyperspectral imaging results showed that regions of simulated high shear stress on the membrane co...

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Biocidal polymers active by contact. IV. Polyurethanes based on polysiloxanes with pendant primary alcohols and quaternary ammonium groups

Cited by 79 publications

References 14 publications

Biocidal polymers active by contact. V. Synthesis of polysiloxanes with biocidal activity

Biocidal polymers active by contact. V. Synthesis of polysiloxanes with biocidal activity

Antimicrobial Siloxane Statistical and Graft Copolymers Substituted with t-Butylamine and t-Butylammonium Biocidal Functions

Analysis of micromixers and biocidal coatings on water-treatment membranes to minimize biofouling.

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