Thermal conductivity variations with composition of gelatin-silica aerogel-sodium dodecyl sulfate with functionalized multi-walled carbon nanotube doping in their composites
Silica aerogels are very light, highly porous nanomaterial with large internal surface area possessing excellent thermal insulation that may get affected when the binders and additives used in aggregation. This paper discusses the variations in thermal conductivity of a binder-treated gelatin silica...
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| Format: | Journal Article |
| Language: | English |
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2015
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| Online Access: | https://hdl.handle.net/10356/104411 http://hdl.handle.net/10220/38853 |
| _version_ | 1811697533682974720 |
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| author | Mahesh, Sachithanadam Joshi, Sunil Chandrakant |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Mahesh, Sachithanadam Joshi, Sunil Chandrakant |
| author_sort | Mahesh, Sachithanadam |
| collection | NTU |
| description | Silica aerogels are very light, highly porous nanomaterial with large internal surface area possessing excellent thermal insulation that may get affected when the binders and additives used in aggregation. This paper discusses the variations in thermal conductivity of a binder-treated gelatin silica aerogel-sodium dodecyl sulfate (GSA-SDS) composite blocks doped with COOH group functionalized multi-walled carbon nanotubes (FMWNT) prepared via freeze drying and frothing methods. The thermal conductivity of GSA-SDS and GSA-SDS/FMWNT composites was evaluated with several mass ratios of the composite mix for 1-D steady-state heat transfer at mean temperature, Tm (300-370K), using Lee’s Disc method. The effects of silica aerogel granule size and mass ratio of FMWNT on the thermal conductivity were investigated. The lowest thermal conductivity achieved for the composite block was 0.016 W/m-K when 0.042 wt% FMWNT was added to gelatin aerogel mass ratio of 0.1:0.9 without SDS. Thermal conductivity predictive models were developed based on the numerous experiments carried out as a function of the aerogel granule size and the mass ratio of constituent materials. The predictive models for composites with FMWNT were validated to approximately 94.3 ± 2.4% accuracy with reduction of 7% in the thermal conductivity when compared with of the GSA composites. |
| first_indexed | 2024-10-01T07:56:46Z |
| format | Journal Article |
| id | ntu-10356/104411 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:56:46Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/1044112023-03-04T17:20:43Z Thermal conductivity variations with composition of gelatin-silica aerogel-sodium dodecyl sulfate with functionalized multi-walled carbon nanotube doping in their composites Mahesh, Sachithanadam Joshi, Sunil Chandrakant School of Mechanical and Aerospace Engineering Carbon nanotubes Silica aerogels Thermal conductivity Freeze drying Statistics Silica aerogels are very light, highly porous nanomaterial with large internal surface area possessing excellent thermal insulation that may get affected when the binders and additives used in aggregation. This paper discusses the variations in thermal conductivity of a binder-treated gelatin silica aerogel-sodium dodecyl sulfate (GSA-SDS) composite blocks doped with COOH group functionalized multi-walled carbon nanotubes (FMWNT) prepared via freeze drying and frothing methods. The thermal conductivity of GSA-SDS and GSA-SDS/FMWNT composites was evaluated with several mass ratios of the composite mix for 1-D steady-state heat transfer at mean temperature, Tm (300-370K), using Lee’s Disc method. The effects of silica aerogel granule size and mass ratio of FMWNT on the thermal conductivity were investigated. The lowest thermal conductivity achieved for the composite block was 0.016 W/m-K when 0.042 wt% FMWNT was added to gelatin aerogel mass ratio of 0.1:0.9 without SDS. Thermal conductivity predictive models were developed based on the numerous experiments carried out as a function of the aerogel granule size and the mass ratio of constituent materials. The predictive models for composites with FMWNT were validated to approximately 94.3 ± 2.4% accuracy with reduction of 7% in the thermal conductivity when compared with of the GSA composites. Accepted version 2015-11-17T05:27:53Z 2019-12-06T21:32:11Z 2015-11-17T05:27:53Z 2019-12-06T21:32:11Z 2015 2015 Journal Article Mahesh, S., & Joshi, S. C. (2015). Thermal conductivity variations with composition of gelatin-silica aerogel-sodium dodecyl sulfate with functionalized multi-walled carbon nanotube doping in their composites. International Journal of Heat and Mass Transfer, 87, 606-615. 0017-9310 https://hdl.handle.net/10356/104411 http://hdl.handle.net/10220/38853 10.1016/j.ijheatmasstransfer.2015.04.046 en International Journal of Heat and Mass Transfer © 2015 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by International Journal of Heat and Mass Transfer, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.ijheatmasstransfer.2015.04.046]. 10 p. application/pdf |
| spellingShingle | Carbon nanotubes Silica aerogels Thermal conductivity Freeze drying Statistics Mahesh, Sachithanadam Joshi, Sunil Chandrakant Thermal conductivity variations with composition of gelatin-silica aerogel-sodium dodecyl sulfate with functionalized multi-walled carbon nanotube doping in their composites |
| title | Thermal conductivity variations with composition of gelatin-silica aerogel-sodium dodecyl sulfate with functionalized multi-walled carbon nanotube doping in their composites |
| title_full | Thermal conductivity variations with composition of gelatin-silica aerogel-sodium dodecyl sulfate with functionalized multi-walled carbon nanotube doping in their composites |
| title_fullStr | Thermal conductivity variations with composition of gelatin-silica aerogel-sodium dodecyl sulfate with functionalized multi-walled carbon nanotube doping in their composites |
| title_full_unstemmed | Thermal conductivity variations with composition of gelatin-silica aerogel-sodium dodecyl sulfate with functionalized multi-walled carbon nanotube doping in their composites |
| title_short | Thermal conductivity variations with composition of gelatin-silica aerogel-sodium dodecyl sulfate with functionalized multi-walled carbon nanotube doping in their composites |
| title_sort | thermal conductivity variations with composition of gelatin silica aerogel sodium dodecyl sulfate with functionalized multi walled carbon nanotube doping in their composites |
| topic | Carbon nanotubes Silica aerogels Thermal conductivity Freeze drying Statistics |
| url | https://hdl.handle.net/10356/104411 http://hdl.handle.net/10220/38853 |
| work_keys_str_mv | AT maheshsachithanadam thermalconductivityvariationswithcompositionofgelatinsilicaaerogelsodiumdodecylsulfatewithfunctionalizedmultiwalledcarbonnanotubedopingintheircomposites AT joshisunilchandrakant thermalconductivityvariationswithcompositionofgelatinsilicaaerogelsodiumdodecylsulfatewithfunctionalizedmultiwalledcarbonnanotubedopingintheircomposites |