A facile preparation of a novel non-leaching antimicrobial waterborne polyurethane leather coating functionalized by quaternary phosphonium salt

Abstract

The aim of this research is to develop a novel non-leaching antimicrobial waterborne polyurethane (WPU) leather coating material with covalently attached quaternary phosphonium salt (QPS). The structure of the QPS-bearing WPU has been identified, and their thermal stability, mechanical property, and antimicrobial performance have been investigated. The results reveal that the incorporation of QPS slightly reduces the thermal stability of WPU material but would not affects its usability as leather coating. Despite the presence of hydrophobic benzene in QPS structure, the strong hydration of its cationic groups leads to the increased surface contact angle (SCA) and water absorption rate (WAR) of the films, suggesting that the water resistance of the films needs to be improved for the purpose of leather coatings. Antibacterial tests demonstrate that when the QPS content is 20 wt%, QPS-bearing WPU shows effective antimicrobial activity against bacteria. The WPU containing QPS prepared in this study is a non-leaching antimicrobial material and has great potential application as leather coating.

“Built to Last”: Plant-based Eco-friendly Durable Antibacterial Coatings

“…The prerequisites for developing a long-term durable antibacterial coating with the desired eco-friendliness are using highly bio-based PU prepolymer solutions with low volatile organic content (Voc), waterborne one-component delivery form, and suitable building blocks that can be readily replaced by antibacterial moieties as “drop-in” substituents. In recent years, PU dispersions have been intensively researched as their properties comply with most key criteria for eco-friendliness. − Li et al had successfully utilized the bio-based ISO diol and DDI diisocyanate to replace conventional fossil-based counterparts; this new coating formulation had demonstrated outstanding bio-carbon content and film quality. In our research, we designed a novel diol for this bio-based PU coating to inflict durable antibacterial property from both active-killing and nonfouling properties (Figure a).…”

Immobilization of Ytterbium by Plant Polyphenols for Antibiofilm Materials with Highly Effective Activity and Long-Term Stability

“…aeruginosa strain CICC 21636 was purchased from the China Center of Industrial Culture Collection. Bacteria were grown in sterile Mueller–Hinton (MH) medium at 37 °C overnight and then washed with sterile saline (0.85%) . The bacterial solution was diluted to ∼10 5 CFU/mL and further grown in SA medium containing glucose, NaCl, NH 4 Cl, K 2 HPO 4 , MgSO 4 ·7H 2 O, and CaCl 2 with the concentrations of 5.00, 8.50, 10.00, 1.00, 1.00, and 0.01 g/L, respectively.…”

“…Bacteria were grown in sterile Mueller−Hinton (MH) medium at 37 °C overnight and then washed with sterile saline (0.85%). 34 The bacterial solution was diluted to ∼10 5 CFU/mL and further grown in SA medium containing glucose, NaCl, NH 4 Cl, K 2 HPO 4 , Representative SEM images with pore diameters of (d) polyamide, (e) EGCG, (f) Yb, and (g) Yb@EGCG membranes. The dashed red boxes are the photos of (d) polyamide, (e) EGCG, (f) Yb, and (g) Yb@EGCG membranes.…”

Water - Based Polyurethanes for Antibacterial Coatings: an Overview

“…One of the limitations of using chitosan is its solubility in acidic environment. The major disadvantages of chitosan is the loss of its antibacterial properties in alkaline conditions, which causes the cationic nature of chitosan to be lost and it is no longer able to stick to the walls of bacteria vessels (Wang et al, 2020). Also, other biological compounds can be added to it in order to increase the biocompatibility of chitosan.…”