Recent advance in antibacterial activity of nanoparticles contained polyurethane

Abstract

Polyurethanes (PUs) are among the most widely used polymers with various applications in several industries. Antibacterial activity is an important feature of PU materials used in medical or many other related consumer products. They can, however, be easily colonized by bacteria and fungi, which may cause many problems for human health. It is therefore very important to enhance the antimicrobial properties of PUs, besides improving their chemical and physical properties. The incorporation of some antibacterial materials in the PUs' polymeric matrices is an effective strategy to improve their antibacterial activity. In this regard, the addition of some materials including Ag, Au, ZnO, and TiO2 nanoparticles, carbon nanotubes and chitosan to the PUs' material structure is reviewed in this article, and their antibacterial mechanisms are discussed. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46997.

Bacteria Exposed to Silver Nanoparticles Synthesized by Laser Ablation in Water: Modelling E. coli Growth and Inactivation

“…The mode of antibacterial action of AgNPs is still not resolved [23] though many mechanisms incorporate the release of silver ions while some report formation of pits in the cell wall due to the nanoparticles accumulation [24]. It was reported that the mode of action is size-dependent: the bactericidal effect of AgNPs smaller than 10 nm is due to the nanoparticles, but the predominant mechanism of the larger ones might be the release of silver ions [25].…”

Polyurethane/Zinc Oxide (PU/ZnO) Composite—Synthesis, Protective Property and Application

“…To protect the material from bacterial attack, different approaches have been followed. One of the useful ways is to enhance antibacterial properties by using different metal oxides nanoparticles with the proper material [ 84 ]. ZnO has also been used in PU/ZnO nanocomposites to enhance antibacterial properties [ 84 ].…”

“…One of the useful ways is to enhance antibacterial properties by using different metal oxides nanoparticles with the proper material [ 84 ]. ZnO has also been used in PU/ZnO nanocomposites to enhance antibacterial properties [ 84 ]. It is common knowledge that a pristine PU material has negligible antibacterial properties [ 35 , 84 ]; however, with the inclusion of ZnO in the PU, the antibacterial properties improve significantly.…”

“…In the last two decades, a significant property improvement has been found by using the above metal oxides nanoparticles in the PU matrix. In particular, ZnO nanoparticle enhances the material properties and is being used in many different areas [ 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 ].…”

“…ZnO has unique properties, such as excellent photostability and chemical stability; furthermore, it has an electrochemical coupling coefficient and a broad range of radiation absorption [ 31 , 32 , 33 , 34 , 35 ]. Due to its low toxicity, biodegradability and biocompatibility, ZnO has been used with many polymers [ 81 , 82 , 83 , 84 , 85 ]. In many cases, ZnO was preferable to other metal oxides (such as CeO 2 , CuO and TiO 2 ) , because ZnO is comparatively very cost-effective, is free of surface water has and has an easy synthesis process [ 34 , 37 , 38 , 39 , 40 , 41 , 50 , 62 , 64 , 86 ].…”