Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Carbon nanotubes/low density polyethylene composite films for strain sensing
Carbon nanotubes (CNTs) are known to have remarkable mechanical and electrical properties. One of those properties is piezoresistance which makes them suitable to be used in the field of strain sensing. Multi-walled nanotubes (MWNTs) were incorporated in low-density polyethylene (LDPE) matrix to for...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Published: |
AUC Knowledge Fountain
2012
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613417221652480 |
|---|---|
| access_status_str | Open Access |
| author | Abdel Chafy, Radwa Raafat |
| author_browse | Abdel Chafy, Radwa Raafat |
| author_facet | Abdel Chafy, Radwa Raafat |
| author_sort | Abdel Chafy, Radwa Raafat |
| collection | Thesis |
| dc_rights_str_mv | The author retains all rights with regard to copyright. The author certifies that written permission from the owner(s) of third-party copyrighted matter included in the thesis, dissertation, paper, or record of study has been obtained. The author further certifies that IRB approval has been obtained for this thesis, or that IRB approval is not necessary for this thesis. Insofar as this thesis, dissertation, paper, or record of study is an educational record as defined in the Family Educational Rights and Privacy Act (FERPA) (20 USC 1232g), the author has granted consent to disclosure of it to anyone who requests a copy. |
| description | Carbon nanotubes (CNTs) are known to have remarkable mechanical and electrical properties. One of those properties is piezoresistance which makes them suitable to be used in the field of strain sensing. Multi-walled nanotubes (MWNTs) were incorporated in low-density polyethylene (LDPE) matrix to form composite film sensors with different concentrations of 1, 2, 3.5, 5, 6.5, and 8 weight%. The fabrication of such composite was carried out using solid-state mixing, followed by melt blending process. Both extrusion and compression molding processes were used where compression showed more promising results in terms of electrical conductivity. Two types of molds were examined in compression molding, namely flash type mold and a positive type mold. The positive type mold showed better control over process parameters. Furthermore two types of multi-walled carbon nanotubes of different aspect ratios were investigated using the positive type mold to examine their effect on the composite conductivity. The ones with the higher aspect ratio showed much higher conductivity. Strain sensitivity measurements were carried out on composite film samples at percolation threshold and beyond and gauge factors were obtained which showed significantly higher sensitivity than that of conventional strain gauges. |
| format | Thesis |
| id | oai:fount.aucegypt.edu:etds-2266 |
| institution | American University in Cairo (Egypt) |
| last_indexed | 2026-06-10T12:35:48.888Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from AUC Knowledge Fountain — bepress |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | AUC Knowledge Fountain |
| publisherStr | AUC Knowledge Fountain |
| record_format | dspace |
| source_str | AUC Knowledge Fountain — bepress |
| spelling | oai:fount.aucegypt.edu:etds-2266 Carbon nanotubes/low density polyethylene composite films for strain sensing Abdel Chafy, Radwa Raafat Carbon nanotubes (CNTs) are known to have remarkable mechanical and electrical properties. One of those properties is piezoresistance which makes them suitable to be used in the field of strain sensing. Multi-walled nanotubes (MWNTs) were incorporated in low-density polyethylene (LDPE) matrix to form composite film sensors with different concentrations of 1, 2, 3.5, 5, 6.5, and 8 weight%. The fabrication of such composite was carried out using solid-state mixing, followed by melt blending process. Both extrusion and compression molding processes were used where compression showed more promising results in terms of electrical conductivity. Two types of molds were examined in compression molding, namely flash type mold and a positive type mold. The positive type mold showed better control over process parameters. Furthermore two types of multi-walled carbon nanotubes of different aspect ratios were investigated using the positive type mold to examine their effect on the composite conductivity. The ones with the higher aspect ratio showed much higher conductivity. Strain sensitivity measurements were carried out on composite film samples at percolation threshold and beyond and gauge factors were obtained which showed significantly higher sensitivity than that of conventional strain gauges. 2012-02-01T08:00:00Z thesis application/pdf https://fount.aucegypt.edu/etds/1267 https://fount.aucegypt.edu/context/etds/article/2266/viewcontent/Thesis.pdf The author retains all rights with regard to copyright. The author certifies that written permission from the owner(s) of third-party copyrighted matter included in the thesis, dissertation, paper, or record of study has been obtained. The author further certifies that IRB approval has been obtained for this thesis, or that IRB approval is not necessary for this thesis. Insofar as this thesis, dissertation, paper, or record of study is an educational record as defined in the Family Educational Rights and Privacy Act (FERPA) (20 USC 1232g), the author has granted consent to disclosure of it to anyone who requests a copy. Theses and Dissertations AUC Knowledge Fountain Polymer composites Low density polyethylene |
| spellingShingle | Polymer composites Low density polyethylene Abdel Chafy, Radwa Raafat Carbon nanotubes/low density polyethylene composite films for strain sensing |
| title | Carbon nanotubes/low density polyethylene composite films for strain sensing |
| title_full | Carbon nanotubes/low density polyethylene composite films for strain sensing |
| title_fullStr | Carbon nanotubes/low density polyethylene composite films for strain sensing |
| title_full_unstemmed | Carbon nanotubes/low density polyethylene composite films for strain sensing |
| title_short | Carbon nanotubes/low density polyethylene composite films for strain sensing |
| title_sort | carbon nanotubes low density polyethylene composite films for strain sensing |
| topic | Polymer composites Low density polyethylene |
| url | https://fount.aucegypt.edu/etds/1267 https://fount.aucegypt.edu/context/etds/article/2266/viewcontent/Thesis.pdf |
| work_keys_str_mv | AT abdelchafyradwaraafat carbonnanotubeslowdensitypolyethylenecompositefilmsforstrainsensing |