High-performance anionic waterborne polyurethane/Ag nanocomposites with excellent antibacterial property via in situ synthesis of Ag nanoparticles

Abstract

High-performance anionic waterborne polyurethane/Ag nanocomposites synthesized via in situ reduction.

Improvement of Mechanical Properties and Self-Healing Efficiency by Ex-Situ Incorporation of TiO2 Nanoparticles to a Waterborne Poly(Urethane-Urea)

“…As shown, the spectra of both PU0 and TiO 2 -PU0 nanocomposite films did not show any significant differences. In all spectra, there are broad absorbance peaks in the region of 3500–3000 cm −1 , which correspond to the stretching vibration of the hydrogen bonded, at a higher wavenumber peak [10,15], and the non-hydrogen bonded, closer to 3200 cm −1 [10], N–H groups [6,8,10,15]. The intense bands between 3000 and 2750 cm −1 correspond to the asymmetric and symmetric stretching vibrations of C–H groups [8,15], whereas the peaks around 1700 cm −1 are due to the stretching vibrations of the hydrogen bonded and non-hydrogen bonded carbonyl groups [39] of both urea and urethane [8,10,15].…”

“…In the case of waterborne polyurethanes (WPU), the addition of inorganic nanoparticles can enhance the properties of these polymers [4,5,6]. This is the consequence of the combination of the properties of the inorganic nanoparticles with the properties of the polymers [4,7] leading to better thermal [4,7] and mechanical properties [4,8,9].…”

“…This is the consequence of the combination of the properties of the inorganic nanoparticles with the properties of the polymers [4,7] leading to better thermal [4,7] and mechanical properties [4,8,9]. Different types of inorganic nanosized fillers have been incorporated into WPU, such as Au [10], Ag [6,11], grapheme [11,12], different kinds of silica clays [7,13,14], CaCO 3 [15], ZnO [5], Fe 3 O 4 [16], and TiO 2 [8,9,17]. Titanium dioxide (TiO 2 ) is one of the most interesting inorganic nanofillers given its environmentally friendly nature, being chemically inert and showing both high photostability and photocatalytic activity [9,17].…”

In situ and controllable synthesis of Ag NPs in tannic acid-based hyperbranched waterborne polyurethanes to prepare antibacterial polyurethanes/Ag NPs composites

“…Recently, an alternative and promising strategy for the preparation of WPUs/Ag NPs composites is in situ synthesis of Ag NPs using WPUs as a stabilizing agent. [9][10][11] The formed Ag NPs were demonstrated the homogeneous distribution in the WPUs matrix and displayed excellent stability without any agglomeration. 12 For example, an anionic WPU with carboxylate-functional group was tailored synthesized via the introduction of bis (hydroxymethyl) propionic acid (DMPA) in the backbone of WPU and was employed as a stabilizing agent to in situ form Ag NPs for preparation of WPUs/Ag NPs composites.…”

Facile preparation of degradable multi-arm-star-branched waterborne polyurethane with bio-based tannic acid

“…Eco-friendly waterborne polyurethanes (WPUs) have gained increasing attention in a wide range of applications including coatings, adhesives, elastomers and biomedicine due to their good exibility, non-toxicity and non-ammability as well as their reduced volatile organic compounds (VOCs) release compared with their solventbased counterparts. [1][2][3] Recently, bio-based raw materials such as castor oil and soybean oil have been exploited as components to synthesize WPUs, providing an effective and efficient approach for developing bio-based WPUs. [4][5][6] The biological polyurethane material is non-toxic, biodegradable and biocompatible, which is very promising in commercial applications.…”