Improved UV stability of antibacterial coatings with N-halamine/TiO2

Li, Jing; Li, Rong; Du, Jinmei; Ren, Xiaofeng; Worley, S. D.; Huang, Tung‐Shi

doi:10.1007/s10570-013-9976-5

Cited by 47 publications

(39 citation statements)

References 39 publications

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“…The peaks at 27.56°, 36.18°, 41.36°, and 54.42°for rutile titanium dioxide are observed as shown in Figure 5(A) and attributed to the (110), (101), (111), and (211) lattice planes of the rutile phase which is consistent with rutile TiO 2 reported by others. 21,43 It is noted that the characteristic peaks of rutile titanium dioxide are also observed for cotton coated with PSPH/TiO 2 before and after chlorination as shown in Figure 5(B) and (C), indicating that the crystalline phase of rutile TiO 2 on the cotton is not destroyed. The peaks at 16.36°and 22.90°are corresponding to (110) and (200) planes of crystalline cellulose, 44 indicating that the crystalline property of cotton coated with PSPH/TiO 2 before and after chlorination maintain integrity.…”

Section: ■ Results and Discussionmentioning

confidence: 90%

Antimicrobial Cellulose Modified with Nanotitania and CyclicN-Halamine

Liu

Jiang

et al. 2014

Ind. Eng. Chem. Res.

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Organic−inorganic composites have the drawn attention of researchers due to their combined properties. In this work, poly [5,5-dimethyl-3-(3′-triethoxysilylpropyl)hydantoin] (PSPH) was synthesized and coated onto cotton fibers together with titania nanoparticles (TiO 2 ) by chemical binding in a one-bath process. The treated cotton with improved UV stability can produce biocidal properties against S. aureus (ATCC 6538) and E. coli O157:H7 (ATCC 43895) upon chlorination with diluted sodium hypochlorite solutions. The characteristics of the coated cotton were determined by SEM, FTIR, XRD, and XPS, and the washing stability and antibacterial efficacies were tested. Moreover, the N−Cl bond and compound stability under UV irradiation were measured. It was found that the treated cotton showed excellent antimicrobial properties within a brief contact time and great washing stability. The N−Cl bond and compound itself showed excellent stability under UV light irradiation. ■ INTRODUCTIONAs surface antibacterial agents, phosphonium salts, 1−3 quaternary ammonium salts, 4−6 chitosan, 7−9 and N-halamine compounds 10−17 are currently studied and applied in infection control. Among these materials, N-halamine compounds show superior antibacterial properties against a broad spectrum of bacteria within brief contact times with advantages of being environmentally friendly and exhibiting regeneration upon exposure to household bleach solution. The oxidative halogen of N-halamine compounds can be directly transferred to the microbial cell membrane and then inactivate the microorganisms. The poor UV stabilities of some of the N-halamine compounds might limit their practical application. For example, N−Cl bonds of N-halamine siloxanes and covalent bonds between hydantoin siloxanes and cellulose are easily broken under UV light irradiation. 18−20 In our previous work, 21 we have reported that nanotitania was incorporated into the coating of N-halamine diols onto cotton via 1,2,3,4-butanetetracarboxylic acid (BTCA), and the addition of nanotitania in the coatings could dramatically improve the UV stabilities of the N-halamine diols. Therefore, it may be advantageous to bind nanotitania to N-halamine siloxanes and coat onto the fiber surface by covalent bonds to produce antibacterial cotton with improved UV stability and excellent washing stability.Organic−inorganic hybrid materials have received significant interest for a wide range of electronic, 22 magnetic, 23 and optical performances 24−26 because of their better performance properties over the corresponding pure organic or inorganic materials. The usual methods to synthesize the organic−inorganic hybrid compounds are sol−gel, 27−29 in-suit polymerization, 30 and other methods. 31,32 Organosilanes containing one or more alkoxy groups, such as ethyoxy and methoxy groups (−OC 2 H 5 and −OCH 3 ), are widely used as surface modification agents for materials. 33−35 Upon application, alkoxy groups of organosilanes are hydrolyzed to form silanol which can react with OH groups of the subst...

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Section: ■ Results and Discussionmentioning

confidence: 90%

Antimicrobial Cellulose Modified with Nanotitania and CyclicN-Halamine

Liu

Jiang

et al. 2014

Ind. Eng. Chem. Res.

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“…The tensile strength of the coated cotton fabrics depends on the finishing condition (temperature, time, pH, etc.) and the mobility of cotton fibers units . The glycosidic bond in the cellulose molecule can be easily hydrolyzed under acidic conditions and high temperatures, which will cause large loss of tensile strength for the cotton fabrics and seriously affect their application.…”

Section: Resultsmentioning

confidence: 99%

“…and the mobility of cotton fibers units. 6,36 The glycosidic bond in the cellulose molecule can be easily hydrolyzed under acidic conditions and high temperatures, which will cause large loss of tensile strength for the cotton fabrics and seriously affect their application. In some research, crosslinking agents, such as 1,2,3,4-butanetetracarboxylic ARTICLE WILEYONLINELIBRARY.COM/APP acid and citric acid, were used to prepare the functional textile, but the crosslinking in the surface of fabrics severely restricted the mobility of cellulose units and the treated fabrics could be easily broken under the action of force.…”

Section: Tensile Strengthmentioning

confidence: 99%

Preparation of antibacterial cellulose with s‐triazine‐based quaternarized N‐halamine

Jiang

Qiao²,

Ren

et al. 2017

J of Applied Polymer Sci

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To reduce the neutral salt used in the textile finishing with s‐triazine derivatives, a novel s‐triazine‐based quaternarized N‐halamine precursor was synthesized by two simple steps and characterized by H‐NMR and FT‐IR. This compound can be effectively coated onto cellulose by nucleophilic substitution process without neutral salt. The treated cellulose was rendered with powerful biocidal efficacy after transferring to an N‐halamine structure by exposing to dilute sodium hypochlorite solution through the synergistic antimicrobial effect quaternary ammonium salt and N‐halamine. The chlorinated samples could inactivate 6‐logs of Staphylococcus aureus and Escherichia coli O157:H7 within 1 min and 5 min, respectively. In addition, about 50% of oxidant chlorine remained after 50 washing cycles and 30 days storage, and all of the lost active chlorines in the N‐halamine molecules recovered after exposing to bleach solution. With these advantages, the as‐prepared antimicrobial fabrics will have potential application, especially in the medical and healthcare textiles. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44998.

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“…N-halamines are a class of antimicrobial compounds with the advantages of high antimicrobial activity, long-term stability, good durability, easy regeneration, low toxicity and minimal environmental impact [11][12][13][14][15]. These compounds function by releasing active chlorine as N-Cl functional groups are converted to N-H [16][17][18][19]. As an example, Cerkez et al reported that textiles based on N-halamines exhibited excellent bactericidal properties [20].…”

Section: Introductionmentioning

confidence: 99%

A simple method to prepare superhydrophobic and regenerable antibacterial films

Liang

Chen

Zhu³

et al. 2020

Mater. Res. Express

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Macromolecules incorporating N-halamines have shown significant antibacterial properties and can be regenerated by chlorination. In this work, a new type of regenerable material made of nano-sized latex particles having N-H groups was prepared via the emulsion polymerization of methacrylamide and dodecafluoroheptyl methacrylate with divinylbenzene as a crosslinker. The N-H moieties in this polymer were subsequently transformed into N-Cl groups by chlorination with an aqueous sodium hypochlorite solution, and films were prepared by casting on substrates previously coated with a self-adhesive silicone rubber. The nanoparticles and the films were characterized by Fourier transform infrared (FTIR) spectroscopy, x-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), contact angle measurements, scanning electron microscopy (SEM) and microbiological tests. The results showed that F and Cl were successfully incorporated in the nanoparticles, that the films were thermally stable and hydrophobic (with a contact angle of 152°), and that these materials exhibited antimicrobial properties. The N-Cl groups killed bacteria by releasing active chlorine as they transitioned to N-H groups, and could be re-chlorinated with a methanol solution of isocyanuric chloride. FTIR and XPS analyses confirmed this regeneration, while SEM image showed that the morphology of the original microspheres was maintained after re-chlorination. The re-chlorinated films also maintained superhydrophobic and bactericidal characteristics.

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Improved UV stability of antibacterial coatings with N-halamine/TiO2

Cited by 47 publications

References 39 publications

Antimicrobial Cellulose Modified with Nanotitania and CyclicN-Halamine

Antimicrobial Cellulose Modified with Nanotitania and CyclicN-Halamine

Preparation of antibacterial cellulose with s‐triazine‐based quaternarized N‐halamine

A simple method to prepare superhydrophobic and regenerable antibacterial films

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