EXPLORING THE SUITABILITY OF SOL-GEL–SYNTHESIZED NANO ZnO AS A CURE ACTIVATOR IN CARBON BLACK– AND SILICA-FILLED NR COMPOSITES

2020 ◽  
Author(s):  
Debdas Sikdar ◽  
Kumarjyoti Roy ◽  
Pranut Potiyaraj ◽  
Chayan Das ◽  
Subhas Chandra Debnath
Keyword(s):  
Carbon Black ◽  
Sol Gel ◽  
Filler Loading ◽  
Nano Zno ◽  
Loading Level ◽  
Silica Composite ◽  
Nano Zinc Oxide ◽  
Reduction Of Zno ◽  
Cure Activator ◽  
Nano Zinc

ABSTRACT Sol-gel–synthesized nano zinc oxide (ZnO) is introduced as a cure activator in carbon black (CB)– and silica-filled natural rubber (NR) composites. The performance of sol-gel–synthesized nano ZnO was systematically compared with conventional ZnO for various filled NR composites in terms of cure, mechanical, aging, and thermal properties. At a filler loading level of 40 parts per hundred parts of rubber (phr), only 1 phr nano ZnO provided a better cure rate index and tensile strength as compared with 5 phr conventional ZnO in CB-filled NR composites. On the other hand, at a 40 phr filler loading level, the cure and mechanical properties of the 1 phr nano ZnO cured NR/silica composite were comparable with the properties of the 5 phr conventional ZnO cured NR/silica composite. At the same filler loading level, both 1 phr nano ZnO and 5 phr conventional ZnO had a similar effect on the thermal stability of NR/CB and NR/silica composites. As a whole, 1 phr sol-gel–based nano ZnO could be used as an efficient cure activator instead of 5 phr conventional ZnO in CB- and silica-filled NR composites with successive reduction of ZnO level.

scholarly journals Bioavailability of Methionine-Coated Zinc Nanoparticles as a Dietary Supplement Leads to Improved Performance and Bone Strength in Broiler Chicken Production

Animals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1482
Author(s):  
Ashraf Alkhtib ◽  
Dawn Scholey ◽  
Nicholas Carter ◽  
Gareth W.V. Cave ◽  
Belal I. Hanafy ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Amino Acid ◽  
Bone Strength ◽  
Feed Intake ◽  
Energy Content ◽  
Nano Zno ◽  
Ileal Digestibility ◽  
Nano Zinc Oxide ◽  
Nano Zinc ◽  
Bird Weight

Recently, nanotechnology has been widely adopted in many fields. The goal of this study was to evaluate the potential for amino acid coated nano minerals as a supplement in broiler feed. Zinc was selected as a model mineral for this test and supplementation of nano zinc, both coated and uncoated was compared with organic and inorganic commercial forms of zinc. A total of 48 pens (8 birds each) were assigned to one of the following dietary treatments: Control, methionine-Zinc chelate (M-Zn), nano zinc oxide (Nano-ZnO), and methionine coated nano zinc oxide (M-Nano-ZnO). All experimental diets were formulated with the same total zinc, methionine, protein, and energy content with just the zinc source as a variable. Bird weight, feed intake and feed conversion ratios were recorded weekly, with three birds culled (sacrificed) at day 21 and day 35 for sampling measures. Ileal digestibility of zinc was determined at day 21 and day 35 using titanium dioxide as an inert marker. Blood serum, liver and spleen samples were collected at day 21 and day 35 and analysed for zinc content via inductively coupled plasma mass spectrometry (ICP-MS). Tibia strength and morphometrics were measured from both legs of three birds per pen at day 21 and day 35. The study was conducted at Nottingham Trent University Poultry Unit, UK. The novel method of producing nano minerals coated with amino acids was successfully tested with zinc and material produced to test in the feeding study. Methionine coated nano zinc oxide supplementation significantly improved bird weight gain and the increased feed intake of broilers compared to an inorganic zinc form. Ileal digestibility was also improved with this methionine-nano zinc. Moreover, this supplementation improved the tibia strength of broilers at the age of 21 days, though this was not observed at day 35. Therefore, M-Nano-ZnO could be used to supplement broilers to improve both performance and digestibility with a limited positive impact on bone strength. The results of the current study suggest that the amino acid coating of nano minerals can improve the digestibility of minerals which may have further implications for the field of mineral nutrition in animal feeds.

scholarly journals Effects of in ovo injection of nano-selenium and nano-zinc oxide and high eggshell temperature during late incubation on antioxidant activity, thyroid and glucocorticoid hormones and some blood metabolites in broiler hatchlings

2020 ◽  
Vol 42 ◽  
pp. e46029
Author(s):  
Meisam Shokraneh ◽  
Ali Asghar Sadeghi ◽  
Seyed Naser Mousavi ◽  
Saeid Esmaeilkhanian ◽  
Mohammad Chamani
Keyword(s):  
Antioxidant Activity ◽  
Zinc Oxide ◽  
Blood Parameters ◽  
Nacl Solution ◽  
Negative Effects ◽  
In Ovo ◽  
Nano Zno ◽  
Nano Zinc Oxide ◽  
In Ovo Injection ◽  
Nano Zinc

This experiment was conducted to evaluate the effects of in ovo injection of nano-selenium (Nano-Se) and nano-zinc oxide (Nano-ZnO) and high eggshell temperature (EST) during late incubation on blood parameters of broiler hatchlings. A total of 750 fertile eggs, were weighed and randomly distributed among 5 treatment groups on each of 5 replicate tray levels. The injection was performed on 17 d of incubation. Treatments included of: 1) Eggs not injected and incubated at normal EST (control); 2) Eggs not injected and incubated at high EST; 3) Eggs injected NaCl solution and incubated at high EST (sham); 4) Eggs injected NaCl solution containing 40 µg Nano-Se and incubated at high EST; 5) Eggs injected NaCl solution containing 500 µg Nano-ZnO and incubated at high EST. EST of 37.8ºC (normal) or 38.9ºC (high) was applied from d 19 to 21 of incubation. In ovo injection of Nano-Se and Nano-ZnO significantly increased activity of GSH-Px and SOD and total protein, but decreased the levels of corticosterone, cortisol, T4 and T3 at high EST. Injection of Nano-Se and Nano-ZnO had a significant role in alleviating the negative effects of high temperature incubation and heat stress by increased antioxidant activity and reduced oxidative stress.

Effect of Different Particle Size of Nano-Zinc Oxide on the Surface Binding Energy in Polyimide/Zinc Oxide Composites

2013 ◽  
Vol 785-786 ◽  
pp. 556-560 ◽  
Author(s):  
Jia Qi Lin ◽  
Hui Lin ◽  
Wen Long Yang ◽  
Xiao Kang Li ◽  
Ying Liu ◽  
...  
Keyword(s):  
Particle Size ◽  
Zinc Oxide ◽  
Binding Energy ◽  
Surface Binding ◽  
Nano Zno ◽  
Surface Binding Energy ◽  
Nano Zinc Oxide ◽  
Nano Zinc ◽  
Oxide Composites ◽  
The Relationship

The surface binding energy between the polyimide(PI) and zinc oxide (ZnO) have been simulated using the molecular dynamics theory.The PI / ZnO model has been established by using Forcite program package of Materials Studio software.The total atoms number about 300 million, the radius of the nano-ZnO cluster model have five groups are respectively 0.5 nm, 1 nm, 1.5 nm, 2 nm, 2.5 nm.The effect of different particle size of nano-ZnO on surface binding energy in PI / ZnO composites was investigated. The relationship between the surface binding energy of PI / ZnO composites and the nano-Zno radius, the maximum of surface binding energy were obtained. The computed results show that the intermolecular bonds between nano-ZnO and PI are mainly van der waals bonds.And the surface atomic number of nano-ZnO increases along with the increasing of nano-ZnO radius, indicating that the increasing of contact surface between the nano-ZnO and PI, which lead to the surface binding energy increases, the total energy lower and the system more stable.

scholarly journals Comparative Fluoride Release and Antimicrobial Analysis of Commercial and Experimental Bioactive Glass/Nano-Oxide-Based Dentifrices

2020 ◽  
Vol 14 (01) ◽  
pp. 038-044
Author(s):  
Hashmat Gul ◽  
Maleeha Nayyer ◽  
Mehreen Gilani ◽  
Nadia Aman ◽  
Azad Ali Azad ◽  
...  
Keyword(s):  
Bioactive Glass ◽  
Minimum Bactericidal Concentration ◽  
Aqueous Media ◽  
Challenge Test ◽  
Filler Loading ◽  
Fluoride Release ◽  
Release Behavior ◽  
Nano Zinc Oxide ◽  
Zones Of Inhibition ◽  
Nano Zinc

Abstract Objectives The objectives were to measure fluoride release and assess the antimicrobial behavior of fluoride-doped nano bioactive glass (F-nBG) and nano zinc oxide (ZnO)-enriched novel dentifrices. Materials and Methods Experimental dentifrices were synthesized by incorporating ZnO nanoparticles and F-nBG (1.5 wt% and 4 wt%) as active ingredients. The fluoride release behavior of suspensions and elutes of samples were analyzed by ion selective electrode. Antimicrobial activity and minimum bactericidal concentration against Streptococcus mutans and Lactobacillus casei were evaluated. Microbial stability against contamination was also assessed by a challenge test. Results The fluoride release behavior of experimental dentifrices was higher than that of commercial dentifrices and was dependent on filler loading. The fluoride release was more from suspensions than elutes. Zones of inhibition (ZOIs) and minimum bactericidal concentration values for novel dentifrices showed direct proportionality with filler loading, and effectiveness was exhibited against both strains. Experimental dentifrices exhibited effective antibacterial potential, which could possibly be due to release of sufficient fluoride and zinc ions in aqueous media from F-nBG and ZnO present in their formulations. Conclusion Combination of F-nBG and ZnO may provide a multi-benefit approach for simultaneously treating early white spot lesions, reducing bacterial growth, and providing core plaque control.

Preparation and characterization of Ca-doped zinc oxide nanoparticles for heavy metal removal from aqueous solution

MRS Advances ◽  
2016 ◽  
Vol 1 (53) ◽  
pp. 3607-3612 ◽  
Author(s):  
Imed Ghiloufi ◽  
Jaber El Ghoul ◽  
Abueliz Modwi ◽  
Lassaad El Mir
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Heavy Metal ◽  
Zinc Oxide ◽  
Metal Removal ◽  
Sol Gel ◽  
Heavy Metal Removal ◽  
Nano Zinc Oxide ◽  
Calcium Doped ◽  
Nano Zinc

ABSTRACTNano zinc oxide (ZnO) and Calcium doped zinc oxide (CZ) nanopowders were synthesized by sol–gel method from zinc acetate di-hydrate and an adequate quantity of calcium chloride hexa-hydrate. Calcium doped zinc oxide (CZ) were prepared at different Ca concentrations from 1 wt% (CZ1) to 5 wt% (CZ5). The obtained nanopowders were characterized by transmission electron microscopy and X-ray diffraction. The objective of this work is to find a new and highly efficient nanomaterial for the adsorption of heavy metals from waste water. For this reason, the nanopowders were used to uptake heavy metals (Cr, Cd, and Ni) from aqueous solution. The obtained results show that the incorporation of Ca in nanoparticles zinc oxide (ZnO) increases the capacity adsorption of nanopowders and CZ3 is more efficient than the other Ca-doped samples. In this work we studied also the effect of pH and the pyrolysis temperature of the nanopowders on the removal of heavy metal ions from aqueous solution by CZ3.

Crystallization Behaviour of Nano-ZnO/PET and Nano-ZnO/Polyethylene Glycol (PEG)/PET Composites by In Situ Polymerization

2007 ◽  
Vol 334-335 ◽  
pp. 853-856 ◽  
Author(s):  
Jie Tao ◽  
Xiang Dong ◽  
Tao Wang ◽  
Yi Hua Cui
Keyword(s):  
Polyethylene Glycol ◽  
In Situ Polymerization ◽  
Crystallization Rate ◽  
Nano Particles ◽  
Nano Zno ◽  
Nano Zinc Oxide ◽  
Uniform Dispersion ◽  
Nano Zinc ◽  
Polymerization Method

In order to improve the crystallization properties of the polyethylene terephthalate (PET), nano-zinc oxide (nano-ZnO)/PET and nano-ZnO/polyethylene glycol (PEG)/PET composites were successfully synthesized by in-situ polymerization method in this work. The experimental results indicated that nano particles can accelerate the crystallization of the PET which was demonstrated by increase in the intensities of the XRD peaks. PEG and PET form copolymer in composites, leading to the improvement of the flexibility of the molecule chain. Meanwhile, PEG was able to encapsulate the nano particles to make them have both good compatibility to matrix and uniform dispersion in the composites. Therefore, the crystallization rate and crystallization capability of nano-ZnO/PEG/PET composites were reasonably raised.

Dry Scrubbing of Hydrogen Sulfide Gas Using Nano Zinc Oxide Coated Glass Beads

2017 ◽  
Vol 33 (3) ◽  
pp. 407-418 ◽  
Author(s):  
M S Borhan ◽  
Shafiqur Rahman ◽  
Niloy Chandra Sarker
Keyword(s):  
Zinc Oxide ◽  
Hydrogen Sulfide ◽  
Sol Gel ◽  
Atmospheric Condition ◽  
Glass Beads ◽  
Energy Dispersion Spectroscopy ◽  
Breakthrough Capacity ◽  
Nano Zinc Oxide ◽  
Gradual Loss ◽  
Nano Zinc

Abstract. Hydrogen sulfide (H2S) is one of the most toxic and smelly gases emitted from animal production facilities, which also acts as a catalyst poison in many industrial processes. The principal objective of this research was to develop a dry scrubber to adsorb H2S gas efficiently from airstreams mimicking air exhausts of animal and poultry barns at the ambient atmospheric condition. Nano zinc oxide (nZnO) coated 3-mm sized glass beads were investigated to adsorb H2S gas in a vertical dry scrubber setting. Colloids of nZnO were prepared and thin films of nZnO were grown on the surfaces of commercially available glass beads following a sol-gel method. The sizes of nZnO on glass bead surfaces ranged from nm to µm and found to be clustered due to the repeated coatings on the same surfaces. The energy dispersion spectroscopy (EDS) analysis confirms the presence of sulfur (S) compound that indicated a conversion of H2S into zinc sulfide (ZnS) on nZnO coated bead surfaces. The highest H2S breakthrough capacity of 2.54 mg H2S g-1 sorbent was observed. Heating the beads at 550°C regenerated glass beads effectively but experienced a gradual loss of reactivity as a number of regeneration cycles progressed. This research demonstrated that nZnO supported on glass beads are promising adsorbents for capturing H2S gas from airstreams at ambient temperature. Keywords: Airstreams, Breakthrough capacity, Hydrogen sulfide, Nano zinc oxide, Regeneration.

Sol–gel derived nano zinc oxide for the reduction of zinc oxide level in natural rubber compounds

2014 ◽  
Vol 70 (3) ◽  
pp. 378-384 ◽  
Author(s):  
Kumarjyoti Roy ◽  
Md. Najib Alam ◽  
Swapan Kumar Mandal ◽  
Subhas Chandra Debnath
Keyword(s):  
Zinc Oxide ◽  
Natural Rubber ◽  
Sol Gel ◽  
Nano Zinc Oxide ◽  
Rubber Compounds ◽  
Nano Zinc

Effect of In Situ Surface Modificated Nano-Zinc Oxide on the Curing Structure and Property of Natural Rubber Conventional Vulcanization

2011 ◽  
Vol 236-238 ◽  
pp. 1757-1760
Author(s):  
Yue Hui Chen ◽  
Li Deng ◽  
Zhong Biao Man ◽  
Miao Yang
Keyword(s):  
Zinc Oxide ◽  
Sol Gel ◽  
Accelerated Aging ◽  
Structure And Property ◽  
Hot Air ◽  
Nano Zinc Oxide ◽  
Transmission Electron ◽  
Aging Property ◽  
Nano Zinc

In-situ surface modificated nano-zinc oxide was prepared in sol-gel method and the microscopic structure of the zinc oxide particles was analyzed by transmission electron microscopy (TEM). The influence of the nano-zinc oxide on the physical properties of NR vulcanizates was investigated, and the vulcanizates heat-resistant oxygen aging property was studied by the hot air accelerated aging method. Therefore, not only can the strength and elongation properties of vulcanizates greatly be improved, but aslo the heat oxygen aging property of vulcanizate rubber was extremely promoted.

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