Antimicrobial properties of Ag+ loaded zeolite polyester polyurethane and silicone rubber and long-term properties after exposure to in-vitro ageing

Kaali, Péter; Strömberg, Emma; Aune, Ragnhild E.; Czél, György; Momcilovic, Dane; Karlsson, Sigbritt

doi:10.1016/j.polymdegradstab.2010.06.024

Cited by 50 publications

(42 citation statements)

References 35 publications

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“…Durability of antimicrobial efficiency was found to be directly proportional to the concentration of zeolite samples in material surfaces. These results are consistent with those reported previously (Kaali et al, 2010). As the concentration of Ag zeolites increased, the stability of antimicrobial activity progressed in parallel.…”

Section: Resultssupporting

confidence: 93%

Development of durable antimicrobial surfaces containing silver- and zinc-ion–exchanged zeolites

İyigündoğdu¹,

Demirci²,

Baç³

et al. 2014

Turk J Biol

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The present work involves development of stable antimicrobial materials containing silver-and zinc-ion-exchanged zeolites. Faujasite X and Linde type A zeolites were synthesized, and following ion exchange with Ag + and Zn ++ ions they were found to exhibit antimicrobial effects against bacteria (E. coli, P. aeruginosa, and S. aureus), yeast (C. albicans and C. glabrata), and fungi (A. niger and P. expansum). Zeolites-X and -A containing silver and zinc ions were then mixed with various coating materials, including paints and polypropylene, to develop antimicrobial composites. The long-term antimicrobial characteristics of zeolite-containing composite materials were investigated by inoculating selected microorganisms onto the surface of the materials. The results indicated that the higher the zeolite concentration present in the composite, the more long-term antimicrobial activity was achieved. Silver-ion-exchanged zeolites were more effective against bacterial and candidal species, while zinc zeolites exhibited noticeable antifungal properties. Materials manufactured with metal-ion-exchanged zeolites would prevent microbial growth on surfaces, reducing cross-contamination and infection risk as well as the microbial degradation of products.

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Section: Resultssupporting

confidence: 93%

Development of durable antimicrobial surfaces containing silver- and zinc-ion–exchanged zeolites

İyigündoğdu¹,

Demirci²,

Baç³

et al. 2014

Turk J Biol

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“…However, zeolite is a hydrophilic material and therefore adsorbs moisture and water easily. An in vitro study showed that the increasing zeolite content in polymeric materials results in a higher rate of degradation due to the increased water uptake of the material (Kaali et al, 2010b). In this case, zeolite content above 1% showed significant degradation compared to an unfilled material.…”

Section: Research Strategies and Trends To Decrease Device Related Inmentioning

confidence: 99%

“…Research papers confirm high efficiency of Ag-zeolite polymer against microorganisms (Kam et al, 2008, Kawahara et al, 2000, Pehlivan et al, 2005, Kaali et al, 2010b. The efficiency is based on the silver content which is linked to the zeolite content.…”

Section: Research Strategies and Trends To Decrease Device Related Inmentioning

confidence: 99%

“…In addition to MALDI TOF MS, Gas Chromatography (GC) and High-Performance Liquid Chromatography (HPLC) are widely used for determination of low molecular weight compounds, as reported in several studies (Haider and Karlsson, 2002, Hillborg et al, 2001, Khabbaz et al, 2000, Flassbeck et al, 2001, Flassbeck et al, 2003, Gruemping and Hirner, 1999. The oxidative degradation of medical polymers occurs inside the human body and can be monitored in simulated environments (Backman et al, 2009, Kaali et al, 2010b. The reaction is caused by the peroxides produced by the human body against "non-accepted" implant materials, the rejection mechanism Untereker, 2009, Santerre et al, 2005).…”

Section: Degradation Mechanisms Of Medical Polymersmentioning

confidence: 99%

“…ALF solution simulates the enzymes that may initiate the breakdown of the polymer while Gamble´s solution represents the environment of the deep lungs (Herting et al, 2007, Midander et al, 2007. In a recent study silicone rubber and polyester type polyurethane were exposed to both ALF and Gamble´s solution at 37 o C (the body temperature) for 3 months (Kaali et al, 2010b). During the exposure the formation and increasing concentration of low molecular weight compounds in silicone rubber were observed.…”

Section: Degradation Mechanisms Of Medical Polymersmentioning

confidence: 99%

See 2 more Smart Citations

Prevention of Biofilm Associated Infections and Degradation of Polymeric Materials Used in Biomedical Applications

Kaali¹,

Strömberg²,

Karlsson³

2011

Biomedical Engineering, Trends in Materials Science

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Effects of incorporating technique and silver colloid content on antibacterial performance for thermoplastic films

Pongnop

Sombatsompop

Kositchaiyong

et al. 2011

J of Applied Polymer Sci

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Antibacterial efficacies of various thermoplastics, such as medium-density polyethylene (MDPE), polystyrene (PS), polyethylene terephthalate (PET) and polyvinyl chloride (PVC) containing nano-silver colloids were studied under a wide range of testing conditions. The effects of nano-silver colloid content and the silverpolymer contact time were of our main interests and quantitatively assessed by shake flask method coupled with a plate-count-agar (PCA) technique using Escherichia coli as testing bacteria. Two different methods were used for incorporating the nano-silver colloids into the thermoplastics, these being spray-coating and melt-blending techniques. The experimental results suggested that all neat thermoplastics alone could not generally inhibit the E. coli growth, suggesting that all thermoplastics exhibited nonbactericidal behavior. However, neat PVC appeared to show a retarding effect for the E. coli growth. In addition, coating silver colloid onto all types of thermoplastic substrates could inhibit the E. coli growth up to 99.9% at the optimum silver content of 50 ppm for PS, PET and PVC and of 75 ppm for MDPE. The optimum contact time for all thermoplastics was 150 min. Among the thermoplastics used, PVC exhibited the highest % E. coli reduction, and this was confirmed by the higher silver content via Atomic Absorption Spectrometry (AAS) technique. For a given silver content, the spray-coating technique could give better dispersion level of silver throughout the thermoplastic films and this led to more effective antibacterial performance as compared with the dry-blending technique. In PVC sample, the contact angle value appeared to increase with the addition of silver content for both incorporating techniques.

show abstract

Antimicrobial properties of Ag+ loaded zeolite polyester polyurethane and silicone rubber and long-term properties after exposure to in-vitro ageing

Cited by 50 publications

References 35 publications

Development of durable antimicrobial surfaces containing silver- and zinc-ion–exchanged zeolites

Development of durable antimicrobial surfaces containing silver- and zinc-ion–exchanged zeolites

Prevention of Biofilm Associated Infections and Degradation of Polymeric Materials Used in Biomedical Applications

Effects of incorporating technique and silver colloid content on antibacterial performance for thermoplastic films

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