Micro and nanoparticles blended sesame oil bio-lubricant: study of its tribological and rheological properties

Micro & nano letters

article

Sabarinath Sankaran Nair¹  Kumarapillai Prabhakaran Nair¹  Perikinalil Krishnan Rajendrakumar¹ 

[1] Department of Mechanical Engineering

关键词: lubricants;    minerals;    biodegradable materials;    additives;    vegetable oils;    crops;    rheology;    lubrication;    oxidation;    friction;    lubricating oils;    wear;    tribology;    zinc compounds;    titanium compounds;    sesame oil bio-lubricant;    rheological properties;    nonrenewability;    mineral oil-based lubricants;    vegetable oil-based lubricants;    low pour point;    reasonable oxidation stability;    nontoxic nature;    eco-friendly base stock;    poor tribological properties;    industrial grade lubricant;    potential bio-lubricant;    morphology variation spherical-shaped titanium dioxide;    above-formulated lubricants;    oil blends;    SESO;    cultivated tropical crop;    potential base oil;    molybdenum disulphide;    wear scar diameter;    friction diameter;    TiO2;    ZnO;    MoS2;   

DOI  :  10.1049/mnl.2018.5395

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

A rapid, sensitive and without extraction spectrophotometric method for determination of clonazepam (CLO) in pure and pharmaceutical dosage forms has been described. The proposed method was simply depended on charge transfer reaction between reduced CLO (n-donor) and metol (N-methyl-p-aminophenol sulfate) as a chromogenic reagent (Ï€- acceptor). The reduced drug, with zinc and concentrated hydrochloric acid, produced a purple colored soluble charge-transfer complex with metol in the presence of sodium metaperiodate in neutral medium, which has been measured at λmax 532 nm. All the variables which affected the developed and the stability of the colored product such as concentration of reagent and oxidant, temperature and time of reaction were investigated and optimized. The linearity of the method was observed within a concentration range 5-40 μg ml-1 CLO and with a correlation coefficient not less than 0.998, while the molar absorbitivity and sandell sensitivity were 3.473×103 L.mole-1.cm-1  and 0.0909 μg cm-2  respectively. The present work includes also the usage of the Benesi–Hildebrand equation for the evaluation of the association constant and molar  absorptivity of the colored complex .Finally the proposed method was successfully applied for the determination of CLO in tablets.

【 授权许可】

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