Physicochemical and antibacterial properties of polyurethane coatings modified by <scp>ZnO</scp>

Król, Bożena; Pielichowska, Kinga; Sochacka‐Piętal, Marta

doi:10.1002/pat.4217

Cited by 14 publications

(5 citation statements)

References 20 publications

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“…The SEM–EDX spectra of the membrane surfaces with the lower isocyanate index are shown in Figure . The spectra of unmodified (PU‐0) polyurethanes exhibited only C and O bands as experienced in other studies . The spectra of QAS‐added membranes include an additional band at 0.40 keV, between carbon and oxygen bands, assigned to quaternary nitrogen atom …”

Section: Resultssupporting

confidence: 58%

Preparation of breathable polyurethane membranes with quaternary ammonium salt diols providing durable antibacterial property

Aydın

Demirci

Orhan

et al. 2018

J of Applied Polymer Sci

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Aim of this study was to produce hydrophilic breathable polyurethane membranes providing antibacterial property permanently by incorporation of a quaternary ammonium salt diol (QAS). The study was carried out by synthesis of nine different polyurethanes by solution polymerization through variations of their QAS and isocyanate contents. Fully amorphous membranes at a thickness of~30 μm were produced from the synthesized polymers and their thermal and morphological characteristics were determined. The effect of morphological structures on the membrane water vapor transmission rates (WVTR) and antibacterial properties were correlated. The WVTR increased with the increased temperature in all membranes over 10-40 C, all produced membranes showed water resistance up to a pressure of 2100 cmH2O and WVTR values above 60 g/m 2 h at 30 C. The WVTR increased by increasing amount of QAS including cationic groups and decreased by increasing isocyanate amount reducing the molecular chain flexibility. In addition, while the unmodified membranes did not show any antibacterial activity, the QAS-added membranes provided significant inactivation against Staphylococcus aureus and Escherichia coli of about 104 CFU within 5 h of contact time.

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Section: Resultssupporting

confidence: 58%

Preparation of breathable polyurethane membranes with quaternary ammonium salt diols providing durable antibacterial property

Aydın

Demirci

Orhan

et al. 2018

J of Applied Polymer Sci

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“…In addition, the peak at 3400 and 1214 cm −1 significantly decreases, the peak at 2264 and 1010 cm −1 almost completely disappears, and the characteristic peak of C═O in carbamate appears at 1719 cm −1 . These results suggest that the hydroxyl group in PR may completely react with the –NCO group …”

Section: Resultsmentioning

confidence: 99%

“…These results suggest that the hydroxyl group in PR may completely react with the -NCO group. 16 The mechanism for improving mechanical properties can be explained in two ways. The toughening mechanism is illustrated in Figure 4.…”

Section: Characterization Of Pup and Pfpupmentioning

confidence: 99%

Preparation and mechanism of polyurethane prepolymer and boric acid co‐modified phenolic foam composite: Mechanical properties, thermal stability, and flame retardant properties

Chen

Xu³

et al. 2019

Polymers for Advanced Techs

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In this work, a new kind of co‐modified phenolic foam was synthesized with polyurethane prepolymer (PUP) and H3BO3 by a simple preparation method. Firstly, in order to determine the optimal amount of PUP, the effects of different PUP additions on the mechanical properties, foam microstructure, and pulverization rate of phenolic foam were investigated. Then H3BO3 was added to toughened phenolic foam, in order to reduce its fire hazard. The results showed that the mechanical properties of the PFPUP8 phenolic foam composite were the best when the PUP content was 8 wt%. It had a small and regular cell structure, and its pulverization ratio was reduced by 80% compared with that of pristine phenolic foam. Meanwhile, the flame retardant properties of PFPUP8 were improved in different degrees with an increase in the amount of H3BO3. Particularly, when the addition of H3BO3 was 10 wt%, the peak heat release rate, the total heat release, and the total smoke release values of PFPUP10B were decreased by 35.4%, 42.4%, and 45.2%, respectively, compared with those of PFPUP8. The value of the limit oxygen index was increased by 33.1%. Besides, the addition of H3BO3 had no adverse effect on the mechanical properties and pulverization ratio of PFPUP8. In addition, the specific mechanisms of toughening, flame retardant, and smoke suppression are also discussed in this paper on the basis of an investigation into the thermal properties of the toughened flame retardant foam composites by thermogravimetric analysis in N2 atmosphere.

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“…Carbon attachment to the oxygen and nitrogen atoms was observed between 60 and 70 ppm. Meanwhile, the urethane carbonyl and CH═N carbons were detected at around 160–180 ppm 51–53 . The hard segment carbon adjacent to the urethane linkage was observed at 33 ppm, whereas peaks at 64 ppm were assigned to carbon‐bonded oxygen (CO) adjacent to the urethane linkage and amine groups 24…”

Section: Resultsmentioning

confidence: 99%

Influence of prepolymer reaction time in the fabrication of palm kernel oil polyol based shape memory polyurethane

Saad

Salleh

Abdullah

et al. 2021

J of Applied Polymer Sci

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Vegetable oil-based shape memory polyurethane (SMPU) has been rapidly developed in the field of advanced polymeric materials due to its unique responsive characteristic. This research aimed to investigate the effect of prepolymer reaction time on the microphase separation, soft segment crystallinity, shape memory, and tensile properties of palm kernel oil polyol (PKO-p)-based SMPU. The SMPU samples were prepared via two-step bulk polymerization process utilizing 4,4-methylenebis (cyclohexyl isocyanate) (HMDI), polycaprolactone diol (PCL) and 1,4-butanediol (BD). The reaction time after the addition of PKO-p varied from 0.5 to 2.5 h in prepolymer synthesis. This reaction time resulted in excellent microphase separation and improve shape memory properties. The Fourier transform infra-red analysis revealed that the degree of microphase separation of the polyurethane elastomer (PUE) increased with increasing prepolymer reaction time. In consequence, the shape fixity behavior of the PUE samples improved. The tensile strength and strain at break of PUE increased with increasing reaction time up to 2.0 h. However, when the reaction time was prolonged to 2.5 h, both values decreased. Thus, the results showed the advantages of using PKO-p, which can minimize the usage of petroleum-based polyol and improve the tensile and shape memory behavior of the PKO-p-based SMPU.

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Physicochemical and antibacterial properties of polyurethane coatings modified by ZnO

Cited by 14 publications

References 20 publications

Preparation of breathable polyurethane membranes with quaternary ammonium salt diols providing durable antibacterial property

Preparation of breathable polyurethane membranes with quaternary ammonium salt diols providing durable antibacterial property

Preparation and mechanism of polyurethane prepolymer and boric acid co‐modified phenolic foam composite: Mechanical properties, thermal stability, and flame retardant properties

Influence of prepolymer reaction time in the fabrication of palm kernel oil polyol based shape memory polyurethane

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