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Synthesis and characterization of electrospun organic-inorganic hybrid graft copolymer nanofibers of poly(methyl methacrylate) and polydimethylsiloxane
Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2007.
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| Format: | Thesis |
| Language: | English |
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Stellenbosch : University of Stellenbosch
2008
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| _version_ | 1867613825602158592 |
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| access_status_str | Open Access |
| author | Swart, Morne |
| author2 | Mallon, P. E. |
| author_browse | Mallon, P. E. Swart, Morne |
| author_facet | Mallon, P. E. Swart, Morne |
| author_sort | Swart, Morne |
| collection | Thesis |
| dc_rights_str_mv | University of Stellenbosch |
| description | Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2007. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/2983 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:42:17.808Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2008 |
| publishDateRange | 2008 |
| publishDateSort | 2008 |
| publisher | Stellenbosch : University of Stellenbosch |
| publisherStr | Stellenbosch : University of Stellenbosch |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/2983 Synthesis and characterization of electrospun organic-inorganic hybrid graft copolymer nanofibers of poly(methyl methacrylate) and polydimethylsiloxane Swart, Morne Mallon, P. E. University of Stellenbosch. Faculty of Science. Dept. of Chemistry and Polymer Science. Synthesis of copolymers Nanofibers Electrospinning Dissertations -- Polymer science Theses -- Polymer science Chemistry and Polymer Science Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2007. Two series of poly(methyl methacrylate)-graft-poly(dimethylsiloxane) copolymers were synthesized via conventional free radical copolymerization of methylmethacrylate and monomethacryloxypropyl terminated PDMS macromonomers of different lengths. It is shown how these copolymers can be electrospun to produce the copolymer nanofibers. The affects of copolymer compositions, the electrospinning tip-to-collector (TCD) distance and the concentration of the polymer solution on the fiber morphology are discussed. Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) were used to establish the surface topography as well as the fiber morphology of the electrospun copolymer nanofibers. It is also shown that these nanofibers produce superhydrophobic surfaces where the preferential surface segregation of the PDMS component is combined with the roughness of the nanofiber surface. It is shown that after exposure of these nanofiber surfaces to corona discharge, the initial superhydrophobic surfaces become easily wettable. The samples show the phenomena of hydrophobicity recovery after corona exposure. The rate and extent of this recovery depends on the PDMS content of the nanofibers as well as the time of corona treatment. The hybrid copolymer nanofibers were evaluated as potential reinforcing fillers for cross linked polydimethylsiloxane compounds. The fibers show a remarkably good distribution in the PDMS matrix and show a dramatic improvement in the mechanical properties of the composites. 2008-04-14T10:06:29Z 2010-06-01T09:03:05Z 2008-04-14T10:06:29Z 2010-06-01T09:03:05Z 2007-12 Thesis http://hdl.handle.net/10019.1/2983 en University of Stellenbosch 19193990 bytes application/pdf application/pdf Stellenbosch : University of Stellenbosch |
| spellingShingle | Synthesis of copolymers Nanofibers Electrospinning Dissertations -- Polymer science Theses -- Polymer science Chemistry and Polymer Science Swart, Morne Synthesis and characterization of electrospun organic-inorganic hybrid graft copolymer nanofibers of poly(methyl methacrylate) and polydimethylsiloxane |
| title | Synthesis and characterization of electrospun organic-inorganic hybrid graft copolymer nanofibers of poly(methyl methacrylate) and polydimethylsiloxane |
| title_full | Synthesis and characterization of electrospun organic-inorganic hybrid graft copolymer nanofibers of poly(methyl methacrylate) and polydimethylsiloxane |
| title_fullStr | Synthesis and characterization of electrospun organic-inorganic hybrid graft copolymer nanofibers of poly(methyl methacrylate) and polydimethylsiloxane |
| title_full_unstemmed | Synthesis and characterization of electrospun organic-inorganic hybrid graft copolymer nanofibers of poly(methyl methacrylate) and polydimethylsiloxane |
| title_short | Synthesis and characterization of electrospun organic-inorganic hybrid graft copolymer nanofibers of poly(methyl methacrylate) and polydimethylsiloxane |
| title_sort | synthesis and characterization of electrospun organic inorganic hybrid graft copolymer nanofibers of poly methyl methacrylate and polydimethylsiloxane |
| topic | Synthesis of copolymers Nanofibers Electrospinning Dissertations -- Polymer science Theses -- Polymer science Chemistry and Polymer Science |
| url | http://hdl.handle.net/10019.1/2983 |
| work_keys_str_mv | AT swartmorne synthesisandcharacterizationofelectrospunorganicinorganichybridgraftcopolymernanofibersofpolymethylmethacrylateandpolydimethylsiloxane |