Effects of surfactants/stabilizing agents on the microstructure and properties of porous geopolymers by direct foaming
Metakaolin-based porous geopolymers were synthesized by direct foaming using various surfactants/stabilizing agents with or without chemical pore-forming agent (hydrogen peroxide). The effects of surfactants/stabilizing agents and solid loading on their pore morphology, density, porosity, and some p...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2021-01-01
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| Series: | Journal of Asian Ceramic Societies |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/21870764.2021.1873482 |
| _version_ | 1818595359319916544 |
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| author | Yingjie Qiao Xinyu Li Chengying Bai Hongqiang Li Jinghao Yan Yi Wang Xiaodong Wang Xiaohong Zhang Ting Zheng Paolo Colombo |
| author_facet | Yingjie Qiao Xinyu Li Chengying Bai Hongqiang Li Jinghao Yan Yi Wang Xiaodong Wang Xiaohong Zhang Ting Zheng Paolo Colombo |
| author_sort | Yingjie Qiao |
| collection | DOAJ |
| description | Metakaolin-based porous geopolymers were synthesized by direct foaming using various surfactants/stabilizing agents with or without chemical pore-forming agent (hydrogen peroxide). The effects of surfactants/stabilizing agents and solid loading on their pore morphology, density, porosity, and some properties, such as thermal conductivity and compression strength, were investigated. Experimental data and different theoretical models were successfully applied to evaluate both compression strength (σ) and effective thermal conductivity (λ) as a function of porosity (ε). Porous geopolymers with higher ε presented both a lower value of mechanical strength and improved thermal conductivity performance. The variation of σ with ε could be well described by the minimum solid area (MSA) model, and the variation of λ with ε was found to be more accurately described using a universal model derived from the five basic models. |
| first_indexed | 2024-12-16T11:14:46Z |
| format | Article |
| id | doaj.art-3708d9b303624b45a979cee5f305d63c |
| institution | Directory Open Access Journal |
| issn | 2187-0764 |
| language | English |
| last_indexed | 2024-12-16T11:14:46Z |
| publishDate | 2021-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Asian Ceramic Societies |
| spelling | doaj.art-3708d9b303624b45a979cee5f305d63c2022-12-21T22:33:38ZengTaylor & Francis GroupJournal of Asian Ceramic Societies2187-07642021-01-019141242310.1080/21870764.2021.18734821873482Effects of surfactants/stabilizing agents on the microstructure and properties of porous geopolymers by direct foamingYingjie Qiao0Xinyu Li1Chengying Bai2Hongqiang Li3Jinghao Yan4Yi Wang5Xiaodong Wang6Xiaohong Zhang7Ting Zheng8Paolo Colombo9Harbin Engineering UniversityHarbin Engineering UniversityHarbin Engineering UniversityHunan UniversityHarbin Engineering UniversityHarbin Engineering UniversityHarbin Engineering UniversityHarbin Engineering UniversityHarbin Engineering UniversityUniversity of PadovaMetakaolin-based porous geopolymers were synthesized by direct foaming using various surfactants/stabilizing agents with or without chemical pore-forming agent (hydrogen peroxide). The effects of surfactants/stabilizing agents and solid loading on their pore morphology, density, porosity, and some properties, such as thermal conductivity and compression strength, were investigated. Experimental data and different theoretical models were successfully applied to evaluate both compression strength (σ) and effective thermal conductivity (λ) as a function of porosity (ε). Porous geopolymers with higher ε presented both a lower value of mechanical strength and improved thermal conductivity performance. The variation of σ with ε could be well described by the minimum solid area (MSA) model, and the variation of λ with ε was found to be more accurately described using a universal model derived from the five basic models.http://dx.doi.org/10.1080/21870764.2021.1873482porous geopolymersmetakaolinperoxidesurfactantsthermal conductivity |
| spellingShingle | Yingjie Qiao Xinyu Li Chengying Bai Hongqiang Li Jinghao Yan Yi Wang Xiaodong Wang Xiaohong Zhang Ting Zheng Paolo Colombo Effects of surfactants/stabilizing agents on the microstructure and properties of porous geopolymers by direct foaming Journal of Asian Ceramic Societies porous geopolymers metakaolin peroxide surfactants thermal conductivity |
| title | Effects of surfactants/stabilizing agents on the microstructure and properties of porous geopolymers by direct foaming |
| title_full | Effects of surfactants/stabilizing agents on the microstructure and properties of porous geopolymers by direct foaming |
| title_fullStr | Effects of surfactants/stabilizing agents on the microstructure and properties of porous geopolymers by direct foaming |
| title_full_unstemmed | Effects of surfactants/stabilizing agents on the microstructure and properties of porous geopolymers by direct foaming |
| title_short | Effects of surfactants/stabilizing agents on the microstructure and properties of porous geopolymers by direct foaming |
| title_sort | effects of surfactants stabilizing agents on the microstructure and properties of porous geopolymers by direct foaming |
| topic | porous geopolymers metakaolin peroxide surfactants thermal conductivity |
| url | http://dx.doi.org/10.1080/21870764.2021.1873482 |
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