scholarly journals Investigative Study On The AC And DC Breakdown Voltage of Nanofluid From Jatropha –Neem Oils Mixture For Use In Oil-Filled Power Equipment.

2021 ◽  
Author(s):  
Faruk Riskuwa Tambuwal ◽  
Samson Okikiola Oparanti ◽  
Ibrahim Abdulkadir ◽  
Umar Sadiq ◽  
A. A. Abdelmalik
Keyword(s):  
Field Strength ◽  
Titanium Oxide ◽  
Breakdown Strength ◽  
Breakdown Field ◽  
Oxide Nanoparticles ◽  
Power Equipment ◽  
Statistical Tool ◽  
Titanium Oxide Nanoparticles ◽  
Base Oil ◽  
Breakdown Field Strength

Abstract This paper investigated the feasibility of developing alternative insulating nanofluid from a mixture of Jatropha and Neem oils into which compositions of 0.2wt% to 1.0wt% of titanium oxide nanoparticles were dispersed. FTIR, SEM-EDX and XRD analysis of Titanium oxide nanoparticles were carried out. The DC and AC breakdown voltages were measured and analysed using Weibull statistical tool. In the Weibull statistical analysis, it was observed that the characteristic breakdown field strength of PJO is higher relative to PNO and has slight differences compared to the PJNO sample. With the dispersion of TiO2 nanoparticles, the characteristic breakdown strength improved as compared with the base oil. Furthermore, the developed Jatropha-Neem mixture nanofluid recorded characteristic breakdown field strength that is much higher compared to that of the mineral oil sample. The JNNF sample possessed the highest characteristic breakdown strength among prepared nanofluids which indicates that the characteristic breakdown strength of the oil samples has been improved considerably with the dispersion of TiO2 nanoparticles. The results have shown the viability of Jatropha-Neem nanofluid as insulating oil for use in oil-filled power equipment.

Titanium Oxide Nanoparticles Improve the Chemotherapeutic Action of Erlotinib in Liver Cancer Cells

2020 ◽  
Vol 16 (4) ◽  
pp. 337-343
Author(s):  
Shaimaa E. Abdel-Ghany ◽  
Eman El-Sayed ◽  
Nour Ashraf ◽  
Nada Mokhtar ◽  
Amany Alqosaibi ◽  
...  
Keyword(s):  
Liver Cancer ◽  
Cancer Cells ◽  
Titanium Oxide ◽  
Phase Distribution ◽  
Oxide Nanoparticles ◽  
Titanium Oxide Nanoparticles ◽  
Liver Cancer Cells ◽  
M Phase ◽  
Apoptosis Detection ◽  
Novel Method

Background: Hepatocellular carcinoma is the second leading cause of cancer-related deaths among other types of cancer due to lack of effective treatments and late diagnosis. Nanocarriers represent a novel method to deliver chemotherapeutic drugs, enhancing their bioavailability and stability. Methods: In the present study, we loaded gold nanoparticles (AuNPs) and titanium oxide nanoparticles (TiO2NPs) with ERL to investigate the efficiency of the formed composite in inducing apoptosis in HepG2 liver cancer cells. Cytotoxicity was assessed using MTT assay and cell phase distribution was assessed by flow cytometry along with apoptosis detection. Results: Data obtained indicated the efficiency of the formed composite to significantly induce cell death and arrest cell cycle and G2/M phase. IRF4 was downregulated after treatment with loaded ERL. Conclusion: Our data showed that loading ERL on TiO2NPs was more efficient than AuNPs. However, both nanocarriers were efficient compared with control.

scholarly journals Effect of Acetylated SEBS/PP for Potential HVDC Cable Insulation

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1596
Author(s):  
Peng Zhang ◽  
Yongqi Zhang ◽  
Xuan Wang ◽  
Jiaming Yang ◽  
Wenbin Han
Keyword(s):  
Mechanical Properties ◽  
Field Strength ◽  
Thermoplastic Elastomer ◽  
High Energy ◽  
Thermoplastic Elastomers ◽  
Electrical Strength ◽  
Voltage Stabilizer ◽  
Breakdown Field ◽  
Cable Insulation ◽  
Breakdown Field Strength

Blending thermoplastic elastomers into polypropylene (PP) can make it have great potential for high-voltage direct current (HVDC) cable insulation by improving its toughness. However, when a large amount of thermoplastic elastomer is blended, the electrical strength of PP will be decreased consequently, which cannot meet the electrical requirements of HVDC cables. To solve this problem, in this paper, the inherent structure of thermoplastic elastomer SEBS was used to construct acetophenone structural units on its benzene ring through Friedel–Crafts acylation, making it a voltage stabilizer that can enhance the electrical strength of the polymer. The DC electrical insulation properties and mechanical properties of acetylated SEBS (Ac-SEBS)/PP were investigated in this paper. The results showed that by doping 30% Ac-SEBS into PP, the acetophenone structural unit on Ac-SEBS remarkably increased the DC breakdown field strength of SEBS/PP by absorbing high-energy electrons. When the degree of acetylation reached 4.6%, the DC breakdown field strength of Ac-SEBS/ PP increased by 22.4% and was a little higher than that of PP. Ac-SEBS, with high electron affinity, is also able to reduce carrier mobility through electron capture, resulting in lower conductivity currents in SEBS/PP and suppressing space charge accumulation to a certain extent, which enhances the insulation properties. Besides, the highly flexible Ac-SEBS can maintain the toughening effect of SEBS, resulting in a remarkable increase in the tensile strength and elongation at the break of PP. Therefore, Ac-SEBS/PP blends possess excellent insulation properties and mechanical properties simultaneously, which are promising as insulation materials for HVDC cables.

Synthesis of polymorphic titanium oxide nanoparticles by a rapid gas-phase chemical reaction

2016 ◽  
Vol 26 (2) ◽  
pp. 157-159 ◽  
Author(s):  
Ning Luo ◽  
Hong Wen Jing ◽  
Zhan Guo Ma ◽  
Weidong Liu ◽  
Liangchi Zhang ◽  
...  
Keyword(s):  
Gas Phase ◽  
Titanium Oxide ◽  
Chemical Reaction ◽  
Oxide Nanoparticles ◽  
Titanium Oxide Nanoparticles ◽  
Phase Chemical
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