Design and synthesis of antibacterial waterborne fluorinated polyurethane

Abstract

Antibacterial waterborne polyurethanes (WPUs) have attracted increasing attention in a wide range of industrial applications because of their versatile properties as well as ecofriendly nature. Although extensive research has been carried out on antibacterial WBPU synthesis, the roles of some of the key synthesis components remain unclear. In this study, the novel chain extender DMG (dimethylol propionamide containing guanidine group) was designed and synthesized, which has not been reported before. DMG and the waterborne fluorinated polyurethanes containing DMG show high bactericidal (> 99.99%) efficacy against a broad spectrum of gram-positive and gram-negative bacteria. Furthermore, when the amount of DMG reached 5%, the average particle size of waterborne fluorinated polyurethane dispersions was 56.24 nm. And waterborne fluorinated polyurethanes showed good thermal (> 460 C) properties and high crystallization with the increase of chain extender DMG. The successful synthesis of these fascinating antibacterial waterborne materials may provide new insights into the development of protection materials in a sustainable form, which could be applied as coatings in various fields to prevent microbial contamination.

Bio-Based Waterborne Polyurethane Coatings with High Transparency, Antismudge and Anticorrosive Properties

“…From Figure b, it could be found that although the particle size of WPU- g -PDMS x was different, the particle size distribution was nearly equal, suggesting that the WPU- g -PDMS x grafted with different amounts of hydrophobic PDMS chains might be distributed in water uniformly to produce a stable dispersion . Compared to the WPU dispersion with an average particle size of 33.0 nm, the particle size of WPU- g -PDMS x dispersions increased from 61.9 nm to 78.6, 94.2, 119.5, and 121.6 nm, as the PDMS content increased from 1.0 wt % to 2.0, 3.0, 4.0, and 5.0 wt %, respectively.…”

Preparation and antibacterial study of waterborne polyurethane modified with lysine and quaternary ammonium salt

“…This may be due to the increased crosslinking density resulting from the introduction of Lys. Among them, the electron cloud-rich N elements from amino groups in Lys can form numerous hydrogen bonds, 31 which restrict the movement of molecular chains and then enlarge the particle size of WKPU. In addition, the large dispersion index (PDI) of WKPU emulsions can be interpreted as an increase in the degree of cross-linking that hinders the movement of molecular chains, thus affecting the uniform growth of molecular chains and the inhomogeneity of molecular lengths and branching.…”

Synthesis, physicochemical, and antimicrobial characteristics of novel poly(urethane-siloxane) network/silver ferrite nanocomposites

“…PU nanocomposites, having superior mechanical properties and biocompatibility, are potentially candidate materials to be used as antibacterial coatings on implants and other medical devices [23,24]. In actual use, various PU materials that have been developed as coatings for implanted medical devices also contain bactericide or contact bactericide [25][26][27][28]. Typically, these antimicrobial compounds are different nanoparticles (silver, copper, ZnO, SiO2, or organoclays) that interfere with bacteria and/or other microorganisms on contact [25][26][27][28], but there is an increasing need to design new and effective PU nanocomposites for coating applications.…”