M. Premalatha, N. Preetha, S. Padmavathi, A. Jeevaraj
{"title":"Enhanced Thermal Conductivity of Carboxyl (–COOH) Functionalized Multi-Walled Carbon Nanotube (MWCNT)-Silicone Oil Based Nanofluids","authors":"M. Premalatha, N. Preetha, S. Padmavathi, A. Jeevaraj","doi":"10.1166/sl.2020.4188","DOIUrl":null,"url":null,"abstract":"Thermal conductivity and viscosity studies of carboxyl (–COOH) functionalized multi-walled carbon nanotubes-Silicone oil nanofluids were discussed in this work. Carboxyl (–COOH) functionalized MWCNT-Silicone oil nanofluids were prepared in various concentration ranges from 0.001 to 0.005 g of COOH-MWCNT and characterized at a range of temperatures between 303 K to 323 K. The thermal conductivity of carboxyl (–COOH) functionalized MWCNT-Silicone oil nanofluids increases with the raise in concentration of MWCNTs and also with the raise in temperatures. Mechanism for the enhancement of Silicone oil with concentration of MWCNT is due to the percolation of heat through the nanotubes through axial direction than through radial direction. Because of large aspect ratio of nanotubes heat transfer inside MWCNTs is also more. Also, as the temperature increases the viscosity of the (–COOH) functionalized MWCNT-Silicone oil nanofluids decreases, because CNT aggregation kinetics may contribute resulting in enhanced thermal conductivity.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"13 1","pages":"52-54"},"PeriodicalIF":0.0000,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sensor Letters","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1166/sl.2020.4188","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
Thermal conductivity and viscosity studies of carboxyl (–COOH) functionalized multi-walled carbon nanotubes-Silicone oil nanofluids were discussed in this work. Carboxyl (–COOH) functionalized MWCNT-Silicone oil nanofluids were prepared in various concentration ranges from 0.001 to 0.005 g of COOH-MWCNT and characterized at a range of temperatures between 303 K to 323 K. The thermal conductivity of carboxyl (–COOH) functionalized MWCNT-Silicone oil nanofluids increases with the raise in concentration of MWCNTs and also with the raise in temperatures. Mechanism for the enhancement of Silicone oil with concentration of MWCNT is due to the percolation of heat through the nanotubes through axial direction than through radial direction. Because of large aspect ratio of nanotubes heat transfer inside MWCNTs is also more. Also, as the temperature increases the viscosity of the (–COOH) functionalized MWCNT-Silicone oil nanofluids decreases, because CNT aggregation kinetics may contribute resulting in enhanced thermal conductivity.
期刊介绍：
The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.
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