Development of new ecofriendly detergent/dispersant/antioxidant/antiwear additives from l-histidine for biolubricant applications

RSC Advances ◽  
2015 ◽  
Vol 5 (47) ◽  
pp. 37649-37656 ◽  
Author(s):  
Raj K. Singh ◽  
Aruna Kukrety ◽  
Gananath D. Thakre ◽  
Neeraj Atray ◽  
Siddharth S. Ray
Keyword(s):  
Schiff Base ◽  
Base Fluid ◽  
Antiwear Additives ◽  
Multifunctional Additive ◽  
Ester Molecule

Novel histidine Schiff base ester molecule containing a detergent like-framework used as multifunctional additive in a polyol base fluid.

Derivatizing l-histidine to develop a novel additive for a polyol-based biolubricant

2015 ◽  
Vol 39 (7) ◽  
pp. 5354-5359 ◽  
Author(s):  
Raj K. Singh ◽  
Shubham Pandey ◽  
Rakesh C. Saxena ◽  
Gananath D. Thakre ◽  
Neeraj Atray ◽  
...  
Keyword(s):  
Schiff Base ◽  
Multifunctional Additive

A novel histidine Schiff base ester, HSE-A, with excellent solubility in a polyol was used as a multifunctional additive for biolubricants.

Evaluation of a Novel Hindered Phenolic Triazine Schiff Base as Multifunctional Additive in Biolube and Biodiesel

2016 ◽  
Vol 7 (6) ◽  
pp. 1437-1445 ◽  
Author(s):  
Raj K. Singh ◽  
Aruna Kukrety ◽  
Om P. Sharma ◽  
Mukesh K. Poddar ◽  
Neeraj Atray ◽  
...  
Keyword(s):  
Schiff Base ◽  
Multifunctional Additive

Spin-crossover in an iron(iii) complex showing a broad thermal hysteresis

2021 ◽  
Author(s):  
Cyril Rajnák ◽  
Romana Mičová ◽  
Ján Moncoľ ◽  
Ľubor Dlháň ◽  
Christoph Krüger ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Spin Crossover ◽  
Thermal Hysteresis ◽  
Mononuclear Complex ◽  
Hysteresis Width ◽  
Thermally Induced

A pentadentate Schiff-base ligand 3,5Cl-L2− and NCSe− form a iron(iii) mononuclear complex [Fe(3,5Cl-L)(NCSe)], which shows a thermally induced spin crossover with a broad hysteresis width of 24 K between 123 K (warming) and 99 K (cooling).

An Experimental Investigation on Thermal Conductivity and Viscosity of Graphene doped CNTs /TiO2 Nanofluid

2020 ◽  
Vol 17 (3) ◽  
Author(s):  
A.M. Zetty Akhtar ◽  
M.M. Rahman ◽  
K. Kadirgama ◽  
M.A. Maleque
Keyword(s):  
Thermal Conductivity ◽  
Zeta Potential ◽  
Base Fluid ◽  
Minimum Quantity Lubrication ◽  
Cutting Fluid ◽  
Cutting Zone ◽  
Observation Method ◽  
The Stability ◽  
The Relationship ◽  
Zeta Potential Analysis

This paper presents the findings of the stability, thermal conductivity and viscosity of CNTs (doped with 10 wt% graphene)- TiO2 hybrid nanofluids under various concentrations. While the usage of cutting fluid in machining operation is necessary for removing the heat generated at the cutting zone, the excessive use of it could lead to environmental and health issue to the operators. Therefore, the minimum quantity lubrication (MQL) to replace the conventional flooding was introduced. The MQL method minimises the usage of cutting fluid as a step to achieve a cleaner environment and sustainable machining. However, the low thermal conductivity of the base fluid in the MQL system caused the insufficient removal of heat generated in the cutting zone. Addition of nanoparticles to the base fluid was then introduced to enhance the performance of cutting fluids. The ethylene glycol used as the base fluid, titanium dioxide (TiO2) and carbon nanotubes (CNTs) nanoparticle mixed to produce nanofluids with concentrations of 0.02 to 0.1 wt.% with an interval of 0.02 wt%. The mixing ratio of TiO2: CNTs was 90:10 and ratio of SDBS (surfactant): CNTs was 10:1. The stability of nanofluid checked using observation method and zeta potential analysis. The thermal conductivity and viscosity of suspension were measured at a temperature range between 30˚C to 70˚C (with increment of 10˚C) to determine the relationship between concentration and temperature on nanofluid’s thermal physical properties. Based on the results obtained, zeta potential value for nanofluid range from -50 to -70 mV indicates a good stability of the suspension. Thermal conductivity of nanofluid increases as an increase of temperature and enhancement ratio is within the range of 1.51 to 4.53 compared to the base fluid. Meanwhile, the viscosity of nanofluid shows decrements with an increase of the temperature remarks significant advantage in pumping power. The developed nanofluid in this study found to be stable with enhanced thermal conductivity and decrease in viscosity, which at once make it possible to be use as nanolubricant in machining operation.

Polymer Anchored Copper (II) Complex Supported by -ONNO- Schiff Base: Efficient Catalysts for Oxidation of Phenol

2011 ◽  
Vol 3 (11) ◽  
pp. 44-48
Author(s):  
Alekha Kumar Sutar ◽  
◽  
Yasobanta Das ◽  
Prasanta Rath ◽  
Tungabidya Maharana
Keyword(s):  
Schiff Base ◽  
Polymer Anchored ◽  
Oxidation Of Phenol
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