We are aware that with rapid industrialization, there will an impact on the environment and health issues. This level of awareness has forced the industrialist to minimize the use of mineral oil based metal working fluid. Why mineral oil-based metal working fluid important in the industry? During metal working operations friction, heat, wear and deformation of the work piece occurs if sufficient lubrication is not used. This is because the process operates at high temperature and pressure. So how do we ensure work-efficiency within our metal cutting industry, while still being environmentally conscious?
Dr. Rashmi Walvekar from the School of Engineering at Taylor’s University and her Master student, Mohammad Osama have developed a biodegradable alternative to mineral oil-based metal working fluid. This Nanotech oil based cutting fluid is made from vegetable oils, more specifically peanut oil.
Using the two step method utilizing homogenizer and sonication technique, she developed graphene nanoflakes dispersed in various blend oils comprising of mineral oil (naphthenic base) and peanut oil respectively. The blend oil not only removes the heat generated but also helps in smoother cutting of the metal by reducing wear and friction. The stability, thermophysical properties such density, viscosity and thermal conductivity were measured along with other properties such as oxidation stability and degradation. Mineral oil, peanut oil and palm oil methyl ester (POME) composition were varied with and without dispersion of graphene flakes to find the best suitable combination.
The presence of each constituent has its own unique advantages, which is left open for the consumers to pick as per their requirement. With that, industrialists will have three different options to choose from this patented work. This work is patented with the title “An Oil Based Cutting Fluid Composition and a Method for Manufacturing Thereof”. Patent application number: PI 201800001320, and the patent is currently in patent pending stage. This research also received best paper award at International Conference on Applied Science and Technology 2017.
Moving forward from this, Dr. Rashmi, and her Master student, Danial Aminin Zairin research project is to create enhancements on the current Nanotech oil for application in Transformers. Nowadays, with urbanization more electricity and power are required. So, transformers are pushed to its limits and overtime, they can fail. One of the causes of such failures is due to overheating. To counter this challenge, transformer oil – naphthenic mineral oil, is used to cool down and electrically insulate the transformer system. The Nanotech Oil requires heat dissipation and insulation traits. On the previous projects, graphene nanoparticles were dispersed into pure mineral oil. Besides that, different types of vegetable oil with different blends were studied as substitutes. Now, the extension revolves around hybrid transformer oil where vegetable oil derivative is mixed with mineral oil to study its properties. As for nanoparticles, SiO2-Graphene was previously studied. The research now focusses on altering the structure and morphology of graphene nanoflakes to attain maximum stability and improve heat dissipation.. This is objectively to ensure the transformer system operates at its optimum level and reducing its failure rate. This benefits the industry as the can redesign their transformer system to save cost, reduce size and improve its efficiency.
For more information on commercializing this patent, please contact:
Associate Prof. Dr. Edwin Chung Chin Yau – Director, Knowledge Transfer & Commercialisation
About the Inventor: Dr. Rashmi Gangasa Walvekar
Expertise: Heat/ Mass Transfer Operations (Heat Transfer Fluids, Eutectic Mixtures, Bioplymer Composites, Water Rubber Devulcunisation, and solar energy harvesting)
Dr Rashmi Walvekar obtained her bachelor’s in Chemical Engineering from SDM college of engineering and Technology, Dharwad (India) in year 2004. Later she moved to Malaysia to pursue her postgraduate studies. In year 2007 she completed her Master’s in chemical and environmental engineering from University Putra Malaysia where she worked on CFD simulations of oil-water dispersed flows in pipelines.
Later, in year 2011 she completed her PhD in the area of nanofluids for heat transfer application. During her PhD she won several awards at university, national and international level. In year 2012 Dr Rashmi joined Taylor’s university as a lecturer at department of chemical engineering. She has published more than 35 journal papers appearing in both ISI and Scopus indexed journals. She has also presented conference papers both to national and international audience. Her other research output includes 3 patents and 4 book chapters.
In year 2016, Dr Rashmi has been awarded with vice chancellor most cited academic award and best paper presentation at Taylor’s research fair in year 2016. Again in Year 2017 she received Best paper award at International conference on applied science and technology and International technology congress. She has supervised many final year research projects with excelled research outputs and graduated 4 master students at Taylor’s and 2 external PhD students. Her research area includes nanofluid synthesis for heat transfer application, deep eutectic solvents as alternative solvents, recycle of waste rubber tire, production of nanoparticles from biomass, bio-nanolubricants (engine oil/transformer oil etc).
For more information on the patent “An Oil Based Cutting Fluid Composition and a Method for Manufacturing Thereof”, please contact:
Dr. Rashmi Gangasa Walvekar