scholarly journals Preparation of ZnO Nanoparticle/Acrylic Resin Superhydrophobic Coating via Blending Method and Its Wear Resistance and Antibacterial Properties

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3775
Author(s):  
Changquan Li ◽  
Chen Wang ◽  
Ziang Li ◽  
Zhenjun Cao ◽  
Yu Xie ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Zno Nanoparticles ◽  
Surface Composition ◽  
Antibacterial Properties ◽  
Acrylic Resin ◽  
Resin Content ◽  
Zno Nanoparticle ◽  
Superhydrophobic Coating ◽  
Blending Method ◽  
Modified Zno Nanoparticles

Herein, a facile method for the preparation of an acrylic resin-based superhydrophobic coating is provided. Firstly, ZnO nanoparticles were modified with silane to obtain hydrophobic ZnO, which was then homogeneously blended with acrylic resin. Subsequently, the mixture was sprayed on an aluminum sheet to form a cured coating. The surface composition and morphology of the coating were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The hydrophobicity, wear resistance, and antibacterial properties of the prepared samples were tested. The optimized hydrophobicity was achieved with 10 wt% modification agent and resin-to-ZnO mass ratio of 1:4, exhibiting contact and sliding angles of 168.11° and 7.2°, respectively. Wear resistance was insufficient with a low resin content, while it grew with the increase in the resin content. However, when the resin content was excessively high, the hydrophobicity was reduced because the resin could wrap the modified ZnO nanoparticles and decrease the number of hydrophobic groups on the surface. Compared with the pure acrylic resin coating, the ZnO nanoparticle/acrylic resin superhydrophobic coating demonstrated a significant enhancement in the antibacterial properties.

scholarly journals Polypropylene/ZnO Nanocomposites: Mechanical Properties, Photocatalytic Dye Degradation, and Antibacterial Property

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 914 ◽  
Author(s):  
Ampawan Prasert ◽  
Somchoke Sontikaew ◽  
Dilok Sriprapai ◽  
Surawut Chuangchote
Keyword(s):  
Mechanical Properties ◽  
Zno Nanoparticles ◽  
Dye Degradation ◽  
Antibacterial Properties ◽  
Sunlight Exposure ◽  
Zno Nanoparticle ◽  
Chemical Structures ◽  
Time Period ◽  
Before And After ◽  
Twin Screw

Nanocomposite materials were prepared by compounding polypropylene (PP) with zinc oxide (ZnO) nanoparticles, using a twin-screw extruder. The compound was molded by injection molding to form dumbbell-shaped specimens. The influence of ZnO nanoparticle content on the morphology, mechanical properties, chemical structure, photocatalytic activity, and antibacterial properties of the obtained nanocomposites was investigated. The morphological images showed that the ZnO nanoparticles were well distributed in the PP matrix. Characterizations of the mechanical properties and chemical structures before and after sunlight exposure found that at the shortest exposure time, crosslinks could occur in the nanocomposites, which resulted in improved mechanical properties. However, sunlight exposure with the time period longer than 18 weeks caused the reduction of the mechanical properties, due to degradation of the PP matrix. It was found that PP with 2% ZnO could achieve the photocatalytic degradation of methylene blue up to 59%. Moreover, the result of antibacterial tests indicated that the nanocomposites had better antibacterial properties than neat PP.

Antibacterial zinc oxide nanoparticles in polymer biomaterial composites

2011 ◽  
Vol 1316 ◽  
Author(s):  
Justin T. Seil ◽  
Thomas J. Webster
Keyword(s):  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Zinc Oxide Nanoparticles ◽  
Antibacterial Properties ◽  
Oxide Nanoparticles ◽  
Zno Nanoparticle ◽  
Crystal Violet Staining ◽  
Antibiotic Resistant ◽  
Endotracheal Tubes

ABSTRACTParticulate zinc oxide (ZnO) is a known antibacterial agent. Studies have shown that reducing the size of ZnO particles to nanoscale dimensions further enhances their antibacterial properties. Polymers, like all biomaterials, run the risk of harboring bacteria which may produce an antibiotic-resistant biofilm. The addition of ZnO nanoparticles, to form a composite material, may reduce undesirable bacteria activity. The purpose of the present in vitro study was to investigate the antibacterial properties of ZnO nanoparticles when incorporated into a polymer biomaterial. Staphylococcus aureus were seeded at a known cell density onto coverslips coated in a film of polyvinyl chloride (PVC) with varying concentrations of ZnO nanoparticles. Samples were cultured for 24 or 72 h. Methods of analysis, including optical density readings and crystal violet staining, indicated a reduced presence of biofilm on ZnO nanoparticle and polymer composites compared to polymer control. Live/dead assays provided images to confirm reduced presence of active bacteria on samples with zinc oxide nanoparticles. Development of this technology may improve biomaterial effectiveness for applications, such as endotracheal tubes and implanted biomaterials, which are prone to bacterial infection.

scholarly journals Enhanced antibacterial properties and promoted cell proliferation in glass ionomer cement by modified with fluorinated graphene-doped

2021 ◽  
Vol 19 ◽  
pp. 228080002110374
Author(s):  
Ruimin Liu ◽  
Errui Wang ◽  
Yumeng Guo ◽  
Qiaozhen Zhou ◽  
Yayuan Zheng ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Glass Ionomer Cement ◽  
Antibacterial Properties ◽  
Plate Count ◽  
Control Group ◽  
Wear Property ◽  
Glass Ionomer ◽  
Blending Method ◽  
Fluorinated Graphene ◽  
Ionomer Cement

In this study, we aimed to improve the properties of conventional glass ionomer cement (GIC), including mechanical properties, wear resistance, antibacterial properties and biological activity, by adding fluorinated graphene (FG). Composites of synthesised FG and GIC were examined after being combined at different mass proportions (0, 0.5, 1.0 and 2.0 wt%). The microstructure and morphology of FG prepared via the hydrothermal method was characterised using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The FG/GIC composite was obtained through the blending method and characterised using SEM. Then, the Vickers microhardness and the wear property of the FG/GIC composite-imitated brushing was measured. The plate count and dilution methods (10-fold) were adopted to investigate the antibacterial properties of FG/GIC by incubating Escherichia coli and Staphylococcus aureus. The biocompatibility of FG/GIC containing the adhesion and cytotoxicity of mouse fibroblast cells (L929) was estimated by the MTT and acridine orange (AO) fluorescent staining. Our results demonstrated that the hardness and abrasive wear resistance of the composites increased, and the microhardness parameter changes exhibited a gradual increase as the concentration continued to increase. A 2.0 wt% FG concentration could effectively improve the bacterial inhibition performance of GIC and was directly proportional to the concentration of FG. The composite materials showed no apparent cytotoxicity on normal L929 cells compared to the control group, and the materials exhibited no cytotoxic effect compared to traditional GIC. Thus, FG/GIC has potential therapeutic value in the field of dental treatment.

Preparation of polycrystalline ZnO nanoparticles loaded onto graphene oxide and their antibacterial properties

2021 ◽  
pp. 102531
Author(s):  
Xin Zhang ◽  
Huanxian Shi ◽  
Enzhou Liu ◽  
Xiaoyun Hu ◽  
Ke Zhang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Zno Nanoparticles ◽  
Antibacterial Properties

ZINC OXIDE NANOPARTICLES FOR ULTRAVIOLET PHOTODETECTION

2011 ◽  
Vol 20 (01) ◽  
pp. 183-194 ◽  
Author(s):  
SHAYLA SAWYER ◽  
LIQIAO QIN ◽  
CHRISTOPHER SHING
Keyword(s):  
Zinc Oxide ◽  
Gallium Nitride ◽  
Zno Nanoparticles ◽  
Green Emission ◽  
Synthesis Process ◽  
Voltage Response ◽  
Zno Nanoparticle ◽  
Linear Current ◽  
Current Voltage ◽  
Lift Off

Zinc Oxide ( ZnO ) nanoparticles were created by a top-down wet-chemistry synthesis process ( ZnO - A ) and then coated with polyvinyl-alcohol (PVA) ( ZnO - U ). In ZnO - U , strong UV emission was apparent while the parasitic green emission, which normally appears in ZnO suspensions, was suppressed. A standard lift-off process via e-beam lithography was used to fabricate a detector by evaporating Aluminum ( Al ) as ohmic electrodes on the ZnO nanoparticle film. Photoconductivity experiments showed that linear current-voltage response were achieved and the ZnO - U nanoparticles based detector had a ratio of UV photo-generated current more than 5 times better than that of the ZnO - A based detector. In addition, non-linear current-voltage responses were observed when interdigitated finger Gold ( Au ) contacts were deposited on ZnO - U . The UV generated current to dark current ratios were between 4 and 7 orders of magnitude, showing better performance than the photodetector with Al contacts. ZnO - U were also deposited on Gallium Nitride ( GaN ) and Aluminum Gallium Nitride ( AlGaN ) substrates to create spectrally selective photodetectors. The responsivity of detector based on AlGaN is twice that of commercial UV enhanced Silicon photodiodes. These results confirmed that ZnO nanoparticles coating with PVA is a good material for small-signal, visible blind, and wavelength selective UV detection.

Synthesis of isotopically modified ZnO nanoparticles and their potential as nanotoxicity tracers

2011 ◽  
Vol 159 (1) ◽  
pp. 266-273 ◽  
Author(s):  
Agnieszka D. Dybowska ◽  
Marie-Noele Croteau ◽  
Superb K. Misra ◽  
Deborah Berhanu ◽  
Samuel N. Luoma ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Modified Zno Nanoparticles

Evaluation of Antibacterial and Antifungal Properties of ZnO and Silver Nanoparticles against Candida Albicans and Streptococcus Mutans in Acrylic Resin

2021 ◽  
Author(s):  
Amin Khaleghi ◽  
Amin Archin ◽  
Mojtaba Azarian Borujeni
Keyword(s):  
Candida Albicans ◽  
Streptococcus Mutans ◽  
Zno Nanoparticles ◽  
Acrylic Resin ◽  
Spherical Particles ◽  
Significance Level ◽  
Ultrasonic Apparatus ◽  
Experimental Laboratory ◽  
Antibacterial And Antifungal ◽  
Post Hoc

Introduction: This study aimed to evaluate the antibacterial and antifungal effect of Ag and zinc oxide nanoparticles to complete denture acrylic resin. Materials & Methods: In this experimental laboratory study, 144 samples were evaluated. The powder of acrylic resin (PMMA Ivoclar Vivadent, Lichenstein SR Triplex Hot) was mixed homogeneously in the ultrasonic apparatus with Ag (purity: 99.99%, size: 20nm, spherical) and ZnO (purity: 99%, size: 10-30 nm, nearly spherical) particles with mass fraction 0.5, 1 ,2 and 5. The microorganisms of this study were Candida albicans and Streptococcus mutans. The growth rate of microorganisms was measured by spectrophotometer based on turbidity and readings at 600 nm. Data were analyzed by ANOVA and Tukey post hoc tests. The significance level was set at 0.05. Results: Increasing Ag and ZnO nanoparticles to acrylic resin reduced the growth of Candida Albicans and Streptococcus Mutans. Even the concentration of 0.5% significantly reduced the growth of microorganisms. Complete growth inhibition was in the concentration of 5% after 24 and 48 hours. Conclusion: Increasing the Ag and ZnO nanoparticles to acrylic resin reduced the growth of microorganisms.

Effect of non-annealed and annealed ZnO on the optical properties of PVC/ZnO nanocomposite films

2021 ◽  
pp. 089270572110386
Author(s):  
Ali F Al-Shawabkeh ◽  
Ziad M Elimat ◽  
Khaleel N Abushgair
Keyword(s):  
Dielectric Constant ◽  
Refractive Index ◽  
Optical Properties ◽  
Zno Nanoparticles ◽  
Oscillator Strengths ◽  
Nanocomposite Films ◽  
Optical Parameters ◽  
Zno Nanoparticle ◽  
Dispersion Energy ◽  
Optical Susceptibility

The goal of this study was to investigate the optical properties of the prepared polyvinyl chloride (PVC)/zinc oxide (ZnO) nanocomposite films. The PVC/ZnO nanocomposite films consist of the addition of different concentrations with both non-annealed ZnO nanoparticles and ZnO nanoparticles annealed at temperature of 700°C. The PVC/ZnO nanocomposite films by weight concentrations of (0 wt.%, 2.5 wt.%, 5 wt.% and 10 wt.%) have been prepared by the casting method. The optical absorbance and transmittance values of the composites films were measured in the wavelength range between (250 to 1100 nm) at room temperature by using the UV-1800 Shimadzu spectrophotometer. The optical properties (absorption coefficient, dielectric constant, refractive index, and optical conductivity) have been investigated by the ultraviolet (UV) spectrophotometer. The optical parameters (direct optical energy gap, excitation energy for electronic transitions, the dispersion energy, static refractive index, static dielectric constant, optical oscillator strengths, the moments of optical spectrum, linear optical susceptibility, third-order nonlinear optical susceptibility, nonlinear refractive index, high-frequency dielectric constant, the carrier concentration to the effective mass ratio, the long wavelength refractive index and the plasma frequency) were calculated. The results showed that the optical properties behavior of the PVC/ZnO nanocomposite films was found to be dependent on the ZnO concentration, and photon wavelength. In addition, the results of the study show that the optical parameters can be influenced by alter the concentration of the nonannealed and annealed a ZnO nanoparticle in the PVC polymer matrix.

Coating of modified ZnO nanoparticles on cotton fabrics for enhanced functional characteristics

2021 ◽  
Author(s):  
Muhammad Usman Munir ◽  
Munir Ashraf ◽  
Hafiz Affan Abid ◽  
Amjed Javid ◽  
Shagufta Riaz ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Cotton Fabrics ◽  
Functional Characteristics ◽  
Modified Zno Nanoparticles
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