Eco-friendly castor oil-based UV-curable urethane acrylate zinc oxide nanocomposites: Synthesis and viscoelastic behavior

2019 ◽  
Vol 54 (1) ◽  
pp. 101-110 ◽  
Author(s):  
Abbas Madhi ◽  
Behzad S Hadavand
Keyword(s):  
Zinc Oxide ◽  
Castor Oil ◽  
Zinc Oxide Nanoparticles ◽  
Viscoelastic Behavior ◽  
Environmentally Friendly ◽  
Urethane Acrylate ◽  
Nano Zno ◽  
Uv Curable ◽  
Maximum Value

Attention to environmental problems and the importance of maintaining it have caused the researchers to pay more attention in this regard. The production of polymers and resins has increased in recent years and has affected by environmental pollution due to their long-term degradation. An appropriate solution to this problem is the synthesis of degradable and environmentally friendly polymers and resins. Using natural materials in the synthesis of polymers and resins can help them to be environmentally friendly. The purpose of this research is to synthesize urethane acrylate resins using natural resources. For this purpose, the urethane acrylate pre-polymer was synthesized with castor oil. Then, using modified zinc oxide nanoparticles with 1, 3 and 5 wt% urethane acrylate zinc oxide nanocomposites were produced. The use of castor oil as a degradable part and lack of organic solvent in radiation systems led to the creation of an environmentally friendly resin. Subsequently, the viscoelastic behavior of the prepared nanocomposite was evaluated. Spectrometry results confirm the synthesized resin structure. The morphology of nanocomposites confirmed the proper particle size distribution in a 3 wt.% sample. The results of the dynamic mechanical thermal analysis test showed that increasing the amount of modified nano ZnO could increase the glass transition temperature, and the maximum value was observed in 5 wt.% modified nano ZnO (69.7℃).

scholarly journals Effects of Long-Term Exposure to Zinc Oxide Nanoparticles on Development, Zinc Metabolism and Biodistribution of Minerals (Zn, Fe, Cu, Mn) in Mice

PLoS ONE ◽  
2016 ◽  
Vol 11 (10) ◽  
pp. e0164434 ◽  
Author(s):  
Chao Wang ◽  
Jianjun Lu ◽  
Le Zhou ◽  
Jun Li ◽  
Jiaman Xu ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Zinc Metabolism

scholarly journals Long-Term Impact of Zinc Oxide Nanoparticles on Differentiation and Cytokine Secretion of Human Adipose-Derived Stromal Cells

Materials ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 1823 ◽  
Author(s):  
Katrin Radeloff ◽  
Andreas Radeloff ◽  
Mario Ramos Tirado ◽  
Agmal Scherzad ◽  
Rudolf Hagen ◽  
...  
Keyword(s):  
Gene Expression ◽  
Zinc Oxide ◽  
Stromal Cells ◽  
Zinc Oxide Nanoparticles ◽  
Caspase 3 ◽  
Cytokine Secretion ◽  
Oxide Nanoparticles ◽  
Zno Nps ◽  
The Impact

Zinc oxide nanoparticles (ZnO-NPs) are widely utilized, for example in manufacturing paints and in the cosmetic industry. In addition, there is raising interest in the application of NPs in stem cell research. However, cytotoxic, genotoxic and pro-inflammatory effects were shown for NPs. The aim of this study was to evaluate the impact of ZnO-NPs on cytokine secretion and differentiation properties of human adipose tissue-derived stromal cells (ASCs). Human ASCs were exposed to the subtoxic concentration of 0.2 µg/mL ZnO-NPs for 24 h. After four weeks of cultivation, adipogenic and osteogenic differentiation procedures were performed. The multi-differentiation potential was confirmed histologically and using polymerase chain reaction (PCR). In addition, the gene expression of IL-6, IL-8, vascular endothelial growth factor (VEGF) and caspase 3 was analyzed. Over the course of four weeks after ZnO-NPs exposure, no significant differences were detected in the gene expression of IL-6, IL-8, VEGF and caspase 3 compared to non-exposed cells. The differentiation was also not affected by the ZnO-NPs. These findings underline the fact, that functionality of ASCs is likely to be unaffected by ZnO-NPs, despite a long-term disposition of NPs in the cells, supposing that the starting concentration was safely in the non-toxic range. This might provide important information for single-use nanomedical applications of ZnO-NPs.

Broiler welfare is preserved by long-term low-dose oral exposure to zinc oxide nanoparticles: preliminary study

2021 ◽  
pp. 1-16
Author(s):  
Manal A. M. Mahmoud ◽  
Doha Yahia ◽  
Doaa S. Abdel-Magiud ◽  
Madeha H. A. Darwish ◽  
Mahmoud Abd-Elkareem ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Low Dose ◽  
Oral Exposure ◽  
Oxide Nanoparticles ◽  
Dose Oral ◽  
Preliminary Study

Acute and long-term in vitro effects of zinc oxide nanoparticles

2015 ◽  
Vol 90 (9) ◽  
pp. 2201-2213 ◽  
Author(s):  
Balasubramanyam Annangi ◽  
Laura Rubio ◽  
Mohamed Alaraby ◽  
Jordi Bach ◽  
Ricard Marcos ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
In Vitro Effects

Hydroponic grown tobacco plants respond to zinc oxide nanoparticles and bulk exposures by morphological, physiological and anatomical adjustments

2019 ◽  
Vol 46 (4) ◽  
pp. 360 ◽  
Author(s):  
Maryam Mazaheri Tirani ◽  
Maryam Madadkar Haghjou ◽  
Ahmad Ismaili
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Essential Element ◽  
Inorganic Nanoparticles ◽  
Wall Thickening ◽  
Oxide Nanoparticles ◽  
Ionic Form ◽  
Natural Form ◽  
Nano Zno ◽  
Root And Shoot Length

Zinc oxide nanoparticles (NPs) are the third highest in terms of global production among the various inorganic nanoparticles, and there are concerns because of their worldwide availability and accumulation in the environment. In contrast, zinc is an essential element in plant growth and metabolism, and ZnO NPs (nano-ZnO) may have unknown interactions with plants due to their small sizes as well as their particular chemical and physical characteristics. The present study examined the effect of nano-ZnO (25nm) and bulk or natural form (<1000nm, bulk-ZnO), compared with zinc in the ionic form (ZnSO4) on Nicotiana tabacum seedlings in a nutrient solution supplemented with either nano-ZnO, bulk-ZnO (0.2, 1, 5 and 25µM) or ZnSO4 (control) for 21 days. Results showed that nano-ZnO at most of the levels and 1µM bulk-ZnO positively affected growth (root and shoot length/dry weight), leaf surface area and its metabolites (auxin, phenolic compounds, flavonoids), leaf enzymatic activities (CAT, APX, SOD, POX, GPX, PPO and PAL) and anatomical properties (root, stem, cortex and central cylinder diameters), while bulk-ZnO caused decreases at other levels. The activities of enzymes were induced to a greater extent by intermediate nano-ZnO levels than by extreme concentrations, and were higher in nano-ZnO treated than in bulk treated tobacco. As the ZnO level increased, the vascular expansion and cell wall thickening of the collenchyma/parenchyma cells occurred, which was more pronounced when treated by NPs than by its counterpart. The Zn content of root and leaf increased in most of ZnO treatments, whereas the Fe content of leaves decreased. Our findings indicate that tobacco responded positively to 1µM bulk-ZnO and to nearly all nano-ZnO levels (with the best levels being at 0.2µM and 1µM) by morphological, physiological and anatomical adjustments.

scholarly journals Influence of zinc oxide nanoparticles on anaerobic digestion of waste activated sludge and microbial communities

RSC Advances ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 5580-5589
Author(s):  
Shutao Wang ◽  
Lingbo Chen ◽  
Hao Yang ◽  
Zhisheng Liu
Keyword(s):  
Zinc Oxide ◽  
Anaerobic Digestion ◽  
Activated Sludge ◽  
Microbial Communities ◽  
Zinc Oxide Nanoparticles ◽  
Waste Activated Sludge ◽  
Oxide Nanoparticles ◽  
Zno Nps

The influence of long-term exposure of zinc oxide nanoparticles (ZnO NPs) to waste activated sludge on anaerobic digestion and microbial communities was studied.

scholarly journals Structural and Spectroscopic Properties of Zno/Pva Nanocomposites

2019 ◽  
Vol 8 (3) ◽  
pp. 2292-2294
Keyword(s):  
Zinc Oxide ◽  
Polyvinyl Alcohol ◽  
Zinc Oxide Nanoparticles ◽  
Ultra Violet ◽  
Spectroscopic Properties ◽  
Material Structure ◽  
Oxide Nanoparticles ◽  
Wurtzite Phase ◽  
Chemical Route ◽  
Nano Zno

Zinc oxide–Polyvinyl alcohol (ZnO/PVA) nanocomposites doped with varying concentrations of nano ZnO were prepared by solution casting method. Zinc oxide nanoparticles were synthesized by simple chemical route. Structural, Optical and Spectroscopic properties of the prepared nanocomposites were studied by using Ultra Violet Visible Spectrophotometer (UV-Vis), X-ray diffraction (XRD), Fourier Transform Infra Red Spectrophotometer (FTIR) and SEM techniques. XRD and FTIR are used to determine the effect of the synthetic conditions and resulting processing on the material structure. XRD reveals the presence of nano ZnO with hexagonal wurtzite phase in the polymer matrix. The peaks in FTIR spectra of the prepared films show the interaction between nano ZnO and the PVA polymer. SEM shows homogenous dispersion of zinc oxide nanoparticles in the polyvinyl alcohol matrix. The optical properties of ZnO/PVA nanocomposites have been investigated.

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