Glassy and Rubbery Epoxy Composites with Mesoporous Silica
The reinforcing efficiency of SBA-15-type mesoporous silica, when used as additive in epoxy polymers, was evaluated in this study. The effects of silica loading and its physicochemical characteristics on the thermal, mechanical, and viscoelastic properties of glassy and rubbery epoxy mesocomposites...
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| Format: | Article |
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MDPI AG
2023-06-01
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| Series: | Journal of Composites Science |
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| Online Access: | https://www.mdpi.com/2504-477X/7/6/243 |
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| author | Dimitrios Gkiliopoulos Dimitrios Bikiaris Doukas Efstathiadis Konstantinos Triantafyllidis |
| author_facet | Dimitrios Gkiliopoulos Dimitrios Bikiaris Doukas Efstathiadis Konstantinos Triantafyllidis |
| author_sort | Dimitrios Gkiliopoulos |
| collection | DOAJ |
| description | The reinforcing efficiency of SBA-15-type mesoporous silica, when used as additive in epoxy polymers, was evaluated in this study. The effects of silica loading and its physicochemical characteristics on the thermal, mechanical, and viscoelastic properties of glassy and rubbery epoxy mesocomposites were examined using SBA-15 mesoporous silicas with varying porosities (surface area, pore size, and volume), particle sizes, morphologies, and organo-functionalization. Three types of SBA-15 were used: SBA-15 (10) with 10 nm pore diameters and long particles, SBA-15 (5) with 5 nm pore diameters and short particles, and SBA-15 (sc) with 10 nm pore diameters and short particles (“sc” for short channel). SBA-15 (10) was modified with propyl-, epoxy-, and amino-groups to study the effect of functionalization. The glassy or rubbery epoxy polymers and mesocomposites were produced by the crosslinking of a diglycidyl ether of bisphenol A (DEGBA) epoxy resin with isophorone diamine (IPD) or Jeffaminje D-2000, respectively. Mesoporous silica was uniformly dispersed inside the polymer matrices; however, the opacity levels between the rubbery and glassy samples were different, with completely transparent rubbery composites being prepared with as high as a 9 wt. % addition of SBA-15. The mechanical and thermal performance properties of the mesocomposites were dependent on both the type of the curing agent, which affected the cross-linking density of the pristine polymer matrix, and the characteristics of the mesoporous silica variants, being, in general, improved by the addition of up to 6 wt. % silica for the glassy polymers and up to 9 wt. % for the rubbery polymers. |
| first_indexed | 2024-03-11T02:18:53Z |
| format | Article |
| id | doaj.art-de6b4f56955b44ad99b8bceb31019eb6 |
| institution | Directory Open Access Journal |
| issn | 2504-477X |
| language | English |
| last_indexed | 2024-03-11T02:18:53Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Composites Science |
| spelling | doaj.art-de6b4f56955b44ad99b8bceb31019eb62023-11-18T11:02:32ZengMDPI AGJournal of Composites Science2504-477X2023-06-017624310.3390/jcs7060243Glassy and Rubbery Epoxy Composites with Mesoporous SilicaDimitrios Gkiliopoulos0Dimitrios Bikiaris1Doukas Efstathiadis2Konstantinos Triantafyllidis3Laboratory of Chemical and Environmental Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, GreeceLaboratory of Polymers and Colors Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, GreeceStone Group International, Kavalari, GR-57200 Thessaloniki, GreeceLaboratory of Chemical and Environmental Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, GreeceThe reinforcing efficiency of SBA-15-type mesoporous silica, when used as additive in epoxy polymers, was evaluated in this study. The effects of silica loading and its physicochemical characteristics on the thermal, mechanical, and viscoelastic properties of glassy and rubbery epoxy mesocomposites were examined using SBA-15 mesoporous silicas with varying porosities (surface area, pore size, and volume), particle sizes, morphologies, and organo-functionalization. Three types of SBA-15 were used: SBA-15 (10) with 10 nm pore diameters and long particles, SBA-15 (5) with 5 nm pore diameters and short particles, and SBA-15 (sc) with 10 nm pore diameters and short particles (“sc” for short channel). SBA-15 (10) was modified with propyl-, epoxy-, and amino-groups to study the effect of functionalization. The glassy or rubbery epoxy polymers and mesocomposites were produced by the crosslinking of a diglycidyl ether of bisphenol A (DEGBA) epoxy resin with isophorone diamine (IPD) or Jeffaminje D-2000, respectively. Mesoporous silica was uniformly dispersed inside the polymer matrices; however, the opacity levels between the rubbery and glassy samples were different, with completely transparent rubbery composites being prepared with as high as a 9 wt. % addition of SBA-15. The mechanical and thermal performance properties of the mesocomposites were dependent on both the type of the curing agent, which affected the cross-linking density of the pristine polymer matrix, and the characteristics of the mesoporous silica variants, being, in general, improved by the addition of up to 6 wt. % silica for the glassy polymers and up to 9 wt. % for the rubbery polymers.https://www.mdpi.com/2504-477X/7/6/243polymer compositesepoxymesoporous silicaSBA-15organo-functionalization |
| spellingShingle | Dimitrios Gkiliopoulos Dimitrios Bikiaris Doukas Efstathiadis Konstantinos Triantafyllidis Glassy and Rubbery Epoxy Composites with Mesoporous Silica Journal of Composites Science polymer composites epoxy mesoporous silica SBA-15 organo-functionalization |
| title | Glassy and Rubbery Epoxy Composites with Mesoporous Silica |
| title_full | Glassy and Rubbery Epoxy Composites with Mesoporous Silica |
| title_fullStr | Glassy and Rubbery Epoxy Composites with Mesoporous Silica |
| title_full_unstemmed | Glassy and Rubbery Epoxy Composites with Mesoporous Silica |
| title_short | Glassy and Rubbery Epoxy Composites with Mesoporous Silica |
| title_sort | glassy and rubbery epoxy composites with mesoporous silica |
| topic | polymer composites epoxy mesoporous silica SBA-15 organo-functionalization |
| url | https://www.mdpi.com/2504-477X/7/6/243 |
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