Synthesis and characterization of polyurethane/zinc oxide nanocomposites with improved thermal and mechanical properties

Zahra, Manzar; Ullah, Habib; Javed, Mohsin; Iqbal, Shahid; Ali, Jigar; Alrbyawi, Hamad; Elkaeed, Eslam B.; Alwadai, Norah; Basha, Beriham; Waseem, Amir; Sarfraz, Sadaf; Amjad, Adnan; Awwad, Nasser S.; Ibrahium, Hala A.; Somaily, H.H.

doi:10.1016/j.inoche.2022.109916

Cited by 8 publications

(8 citation statements)

References 42 publications

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“…PDF # 36–1451 represented the standard card for the hexagonal crystalline zincite structure ZnO. The positions of the diffraction peaks in Figure C correspond to the JCDPS cards (36–1451), and the diffraction peaks at diffraction angles 2θ = 31.769, 34.421, 36.252, 47.538, 56.602, 62.862, and 67.961 can be attributed to ZnO at (100), (002), (101), (102), (110), (103), and (112) crystal planes, respectively . This indicated that the modification of ZnO by rosin did not change the crystal structure of ZnO.…”

Section: Results and Discussionmentioning

confidence: 99%

Alternative Polyurethane/Gutta-Percha/ZnO Biocomposite for Root Canal Therapy Based on an Efficient Melt Extrusion Additive Manufacturing Strategy

Shu

Wan

Liao

et al. 2023

ACS Appl. Polym. Mater.

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This work aims to investigate dental root filling custom gutta-percha (GP) properties based on melt extrusion 3D printing for periapical periodontal disease treatment. Zinc oxide nanoparticles are incorporated into polyurethane/gutta-percha (PGB) composites. A polyurethane/gutta-percha/ZnO (PGB-Zn) biocomposite including BaSO 4 , polyurethane (PU), GP, and ZnO nanoparticles is designed and fabricated. To improve the dispersion of ZnO nanoparticles, rosin is chosen to modify the surface of the ZnO nanoparticles. The PGB-Zn biocomposite exhibits a maximum tensile strength of 26.795 ± 1.173 MPa and a flexural strength of 6.037 ± 0.37 MPa. The chemical interaction between the nanoparticles and the matrix is found in the physical and mechanical characterization of the polyurethane/gutta-percha/ ZnO (PGB-Zn) biocomposite. The inhibition zone test and absorbance photometry show that the composite material inhibits and kills Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). The CCK-8 experimental results show that the PGB-Zn biocomposite has a cytotoxicity level of 0-I. The obtained PGB-Zn biocomposite in this work can be used for accurate root canal therapy as a filling biocomposite by a fused extrusion method, which effectively decreases the potential risk of the clinical implementation of periapical periodontal disease treatment.

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Section: Results and Discussionmentioning

confidence: 99%

Alternative Polyurethane/Gutta-Percha/ZnO Biocomposite for Root Canal Therapy Based on an Efficient Melt Extrusion Additive Manufacturing Strategy

Shu

Wan

Liao

et al. 2023

ACS Appl. Polym. Mater.

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“…The peaks at 2273 and 1707 cm −1 corresponded to isocyanate (NCO) and urethane carbonyl groups, respectively 47,48 . The other peaks were defined as 1529 cm −1 (N–H bending vibration), 1307 cm −1 (asymmetrical C–O stretching vibration of polyol), and 1219 cm −1 (C=O bonds) 49 . Also, 1073 and 1016 cm −1 bands are associated with the N‐CO group urethane and carbonyl groups in the polyester structure of the polyol derived from castor oil 50 .…”

Section: Resultsmentioning

confidence: 99%

“…47,48 The other peaks were defined as 1529 cm À1 (N-H bending vibration), 1307 cm À1 (asymmetrical C-O stretching vibration of polyol), and 1219 cm À1 (C=O bonds). 49 Also, 1073 and 1016 cm À1 bands are associated with the N-CO group urethane and carbonyl groups in the polyester structure of the polyol derived from castor oil. 50 The spectrum of PU composites showed several vibrations characteristic of the neat PU sample.…”

Section: Attenuated Total Reflectance Fourier-transform Infrared Spec...mentioning

confidence: 97%

Bacterial cellulose‐modified castor oil‐based polyurethane sponge for hexavalent chromium removal

Maia,

Pinhati,

Monteceli

et al. 2023

J of Applied Polymer Sci

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Due to the multiple industrial applications of chromium compounds and their dangerous nature for the environment, the development of adsorbent materials has been investigated. In line with this reality, bacterial cellulose (BC) has become a potential filler in the polymeric matrix due to its ability to remove toxic metals; however, its performance is little explored. This research proposes a new approach for BC as a filler in castor oil‐based polyurethane, obtaining a sponge for Cr(VI) removal. The pure PU and PU + X%BC sponges (X stands for BC content between 5 and 20 wt%) were characterized by Fourier‐transform infrared spectroscopy, scanning electron microscopy, optical microscopy, density, contact angle (CA), and thermogravimetric analysis. Sorption capacity and efficiency were evaluated as a function of the fiber content, with tests performed in function of contact time (2.5 min to 3 h) at 50 mg L−1. The BC fillers of the sponges increased the density and influenced the morphological, chemical structural, thermal, and sorption properties. Thus, the sponge (PU + 20%BC) presented the highest CA (104.4°) and the best sorption capacity and efficiency (4.3 mg g−1 and 43.2%). The sorption mechanism was well‐defined by isotherm models, presenting a maximum adsorption capacity of 23.5 mg g−1 and best fit (R2 = 0.989) with the Freundlich isotherm. The sponge is an efficient material for Cr (VI) removal and provided a promising insight into an adsorption mechanism study.

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“…From Figure 6 it can be seen that in air atmosphere, the decomposition reaction of RPUF basically does not occur when the temperature is below 100°C, and no small molecule product escapes. When the temperature exceeds 100°C, the absorption peak of the ether bond (COC) can be observed in the spectrum 21–23 . And when the temperature reaches 200°C, H 2 O (3600 cm −1 , 3500 cm −1 ), CO 2 (2340 cm −1 , 669 cm −1 ) and CO (2100 cm −1 ) are gradually generated 24–27 .…”

Section: Resultsmentioning

confidence: 99%

“…When the temperature exceeds 100 C, the absorption peak of the ether bond ( C O C ) can be observed in the spectrum. [21][22][23] And when the temperature reaches 200 C, H 2 O (3600 cm À1 , 3500 cm À1 ), CO 2 (2340 cm À1 , 669 cm À1 ) and CO (2100 cm À1 ) are gradually generated. [24][25][26][27] With the increase of the temperature, the polyurethane macromolecules continue to decompose, and the volatile small molecule products also gradually increase.…”

Section: Ftir Analysismentioning

confidence: 99%

Study of failure behaviors of rigid polyurethane foam treated under thermal and vibration conditions by experiment and numerical simulation

Qiu

2022

J of Applied Polymer Sci

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Failure mechanism of rigid polyurethane foam (RPUF) treated under different conditions was studied by means of experiments and numerical simulation. Thermal degradation mechanism of RPUF under different temperatures was characterized by thermogravimetric analysis‐Fourier transform infrared spectrometry coupled with gas chromatography–mass spectrometry (TG‐FTIR‐GC–MS) in air and nitrogen atmosphere, respectively. And the vibration failure mechanism of RPUF was analyzed by finite element analysis (FEA) and extended finite element method (XFEM). The experimental results indicated that the failure mode in nitrogen was the broken of carbamate groups, and in air was the broken of carbamate groups and the radical decomposition of ether groups. Numerical simulation suggested that there was vibration stress concentration in the center of foam prism, which was easy to produce sliding and opening fatigue cracks during random vibration.

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Synthesis and characterization of polyurethane/zinc oxide nanocomposites with improved thermal and mechanical properties

Cited by 8 publications

References 42 publications

Alternative Polyurethane/Gutta-Percha/ZnO Biocomposite for Root Canal Therapy Based on an Efficient Melt Extrusion Additive Manufacturing Strategy

Alternative Polyurethane/Gutta-Percha/ZnO Biocomposite for Root Canal Therapy Based on an Efficient Melt Extrusion Additive Manufacturing Strategy

Bacterial cellulose‐modified castor oil‐based polyurethane sponge for hexavalent chromium removal

Study of failure behaviors of rigid polyurethane foam treated under thermal and vibration conditions by experiment and numerical simulation

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