scholarly journals Synthesis of nano zinc oxide and its effect on the cure characteristic and properties of natural rubber vulcanizates

2021 ◽  
Vol 947 (1) ◽  
pp. 012029
Author(s):  
Nghiem Thi Thuong ◽  
Pham Ho Anh Tu ◽  
Nguyen Hoang Trung ◽  
Dang Viet Hung ◽  
Nguyen Han Long
Keyword(s):  
Natural Rubber ◽  
Lower Amount ◽  
Simple Method ◽  
Nano Zno ◽  
Rubber Sample ◽  
Dispersing Agent ◽  
Nano Zinc Oxide ◽  
Cure Characteristic ◽  
Nano Zinc ◽  
Natural Rubber Vulcanizates

Abstract In this work, nano ZnO was synthesized by a simple method using a polymeric substance as a dispersing agent. Characterization of the synthesized ZnO by XRD and SEM confirmed the ZnO was nanometric in size and had a wurtzite structure. The synthesized nano ZnO was used as an activator for natural rubber vulcanization. Different amount of ZnO, 1, 2 and 3 phr, was investigated in the rubber formulation and compared to convention ZnO at a typical amount (6 phr). The sample with 3 phr nano ZnO showed the lowest curing induction time with the highest (ML-MH) at all studied temperatures. Furthermore, the rubber sample with 3 phr ZnO achieved the best properties, i.e., crosslink density, rebound resilience, and hardness compared to the rubber sample with 6 phr conventional ZnO. Interestingly, the properties of rubber sample with 2 phr nano ZnO were probably equivalent and comparable to that of 6 phr conventional ZnO. Thus, it suggested that the synthesized nano ZnO could replace the convention ZnO as an activator for rubber vulcanization even at a lower amount.

EFFECT OF IN SITU SURFACE-MODIFIED NANO–ZINC OXIDE ON THE STRUCTURE AND PROPERTIES OF CONVENTIONAL VULCANIZATION IN NATURAL RUBBER

2014 ◽  
Vol 87 (1) ◽  
pp. 21-30 ◽  
Author(s):  
Zhongbiao Man ◽  
Li Deng ◽  
Miao Yang ◽  
Yuehui Chen ◽  
Zhengjie Jin
Keyword(s):  
Electron Microscopy ◽  
Tensile Strength ◽  
Zinc Oxide ◽  
Natural Rubber ◽  
Nano Zno ◽  
X Ray ◽  
Nano Zinc Oxide ◽  
Nano Zinc ◽  
Surface Modified

ABSTRACT In situ surface-modified nano–zinc oxide (ZnO) had been prepared by the sol-gel method. The microscopic structure of the ZnO particles was characterized by X-ray diffraction and transmission electron microscopy. Scanning electron microscopy with energy-dispersed X-ray spectroscopy was used to observe the dispersal of ZnO in conventional vulcanization of natural rubber (NR). Properties such as cure and tensile characteristics as well as heat-resistance oxygen aging properties were researched and compared. The vulcanized structure of vulcanizate was studied by the balance-swelling method and chemical-detecting process. Results demonstrated that the dispersal of in situ surface-modified nano-ZnO in NR vulcanizate was better than that of ordinary ZnO. Compared with the addition of 5 phr of ordinary ZnO in NR, the tensile strength and elongation of NR vulcanizate filled with 2 phr of in situ surface-modified nano-ZnO increased by 0.55% and 10.34%, respectively. Meanwhile, the retention of tensile strength and elongation of vulcanizate increased by 35.85% and 19.36%, respectively.

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.

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.

scholarly journals EFFECT OF NANO ZINC OXIDE ON TENSILE PROPERTIES OF NATURAL RUBBER COMPOSITE

2018 ◽  
Vol 9 (1) ◽  
pp. 77-90 ◽  
Author(s):  
Saja Mohammed ◽  
◽  
Abdulkareem Alhumdany ◽  
Muhannad Al-Waily ◽  
◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Natural Rubber ◽  
Tensile Properties ◽  
Nano Zinc Oxide ◽  
Rubber Composite ◽  
Nano Zinc

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

scholarly journals Biological Resistance and Application Properties of Particleboards Containing Nano-Zinc Oxide

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Ladislav Reinprecht ◽  
Ján Iždinský ◽  
Zuzana Vidholdová
Keyword(s):  
Zinc Oxide ◽  
Bending Strength ◽  
Urea Formaldehyde ◽  
Brown Rot ◽  
Strength Properties ◽  
Nano Zno ◽  
Biological Resistance ◽  
Weight Losses ◽  
Nano Zinc Oxide ◽  
Nano Zinc

Special particleboards (PBs) proposed for kitchens, bathrooms, hospitals, and some other specific products for interiors should have a sufficient resistance against bacteria, molds, and decaying fungi. This work deals about effects of zinc oxide nanoparticles (nano-ZnO) added into melamine-urea-formaldehyde (MUF) glue in the amounts of 0, 2, 6, 12, or 24% wt. on selected biological, moisture, and strength properties of laboratory-produced one-layer PBs. The nano-ZnO-treated PBs had a higher biological resistance: (1) against the Gram-positive bacterium Staphylococcus aureus by up to ca. 70% and the Gram-negative bacterium Escherichia coli by up to 50%, since their bacterial activities at using 1.0 McFarland bacterial inoculum decreased from 0.38–0.40 by up to 0.12–0.19  ×  108 CFU/ml; (2) against the molds Penicillium brevicompactum and Aspergillus niger by up to ca. 50–63%, since their growth intensities (0–4) on the top surfaces of treated PBs decreased according to a modified EN 15457 from 2.33–2.67 by up to 1.17–1.0; (3) against the brown-rot fungus Coniophora puteana by up to 85.7%, since their weight losses reduced according to a modified ENV 12038 from 17.4% by up to 2.5%. The presence of nano-ZnO in PBs uninfluenced their swelling, water absorption, and bending strength; however, it decreased their internal bond strength by up to 38.8%.

Sign in / Sign up

Export Citation Format

Share Document