Synthesis, Characterization and Properties of Antibacterial Polyurethanes

Abstract

Novel physically crosslinked polyurethane (PUII), based on isophorone diisocyanates, was prepared by a conventional two-step method. The chemical structures of the PUII were characterized by fourier transform infrared (FTIR), proton nuclear magnetic resonance (1H NMR), gel permeation chromatography (GPC), scanning electron microscopy (SEM) and DSC. The PUII hydrogels were subjected to solvent-induced self-assembly in THF + water to construct a variety of morphologies. The self-assembly morphology of the PUII was observed by scanning electron microscopy (SEM). The PUII films with different amounts (0.2%, 0.4%, 0.6%, 0.8%, 1.0%) of 1,3,5-Tris(2-hydroxyethyl)hexahydro-1,3,5-triazine (TNO) were challenged with Escherichia coli, Staphylococcus aureus, Bacillus subtilis and Gray mold. The results showed that when a small amount of antibacterial agent were added, the antibacterial effect of films on Botrytis cinerea was more obvious. The mechanical evaluation shows that the antimicrobial polyurethane films exhibit good mechanical properties.

Study of performance of aerostat envelope materials on the coast

“…The morphology of HV150 clearly changed during natural aging, as shown in Figures 6C1-4. Rough gullies arose with the increase of aging time and the Vectran fabric was exposed after aging for 24 months due to high moisture and severe UV-light irradiation (Duan and Jiang, 2022;Liu et al, 2014). Hence, as can be seen in Figure 6, 3216LV and FV1175 possessed better aging resistance, and ETAV150 and HV150 endured greater damage.…”

“…For ETAV150, the aluminum was easily corroded in the moist and salty environment (Ul-Hamid, et al, 2017). The outer layer of HV150 was TPU, is was more vulnerable to mildew and was degraded when placed in the environment with such high moisture and irradiation (Duan and Jiang, 2022;Liu et al, 2014) relative to 3216LV and FV1175, whose outer layers were PVF and PVDF film, respectively.…”

Evaluation of a Biobased Furanic Polyoxime Ether Polyol for the Synthesis of Intrinsically Antimicrobial Poly(Oxime-Urethane)

“…Polyurethane, as an important category of polymer materials, has been widely used in public scenes such as hospital flooring, public seating, and protective clothing. Therefore, the development of polyurethanes with antimicrobial functions has become one of the current research hotspots. , Currently, most antimicrobial polyurethanes are physically blended with antimicrobial agents or chemically grafted with antimicrobial functional groups . These methods increase the process complexity and cost, and the antimicrobial effect is time-limited.…”

Structural and in silico studies of 2-pyridyl-decorated 2-amino-1,3,5-triazine with a potency against SARS-CoV-2 proteins

“…Notably, the triazine-containing derivatives are also used in the fabrication of antimicrobial films on the surface of various materials, including implants. Such a coating is possible both due to the introduction of compounds into the polymerization mixture, as well as the ability to form their own polymeric structures and covalent interactions with the functional groups of the surface [7][8][9][10]. An additional interest in the pyridine-and triazine-based derivatives as medications is currently due to potential chemical linkage with proteins.…”