Aramid Pulp Reinforced Clay Aerogel Composites: Mechanical, Thermal and Combustion Behavior
In this work, we reported that aramid pulps (AP) reinforced clay aerogel composites with improved mechanical strength, good thermal insulation and fire resistance based on the combination of AP, Poly(vinyl alcohol) (PVA) and sodium montmorillonite (MMT), which present a promising prospect in the the...
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| Format: | Article |
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MDPI AG
2022-10-01
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| Series: | Gels |
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| Online Access: | https://www.mdpi.com/2310-2861/8/10/654 |
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| author | Xiaowu Wang Yang Wang Mengtian Sun Guichao Wang Qiong Liu Ming Li Yury M. Shulga Zhi Li |
| author_facet | Xiaowu Wang Yang Wang Mengtian Sun Guichao Wang Qiong Liu Ming Li Yury M. Shulga Zhi Li |
| author_sort | Xiaowu Wang |
| collection | DOAJ |
| description | In this work, we reported that aramid pulps (AP) reinforced clay aerogel composites with improved mechanical strength, good thermal insulation and fire resistance based on the combination of AP, Poly(vinyl alcohol) (PVA) and sodium montmorillonite (MMT), which present a promising prospect in the thermal insulation application. The PVA-MMT-AP<sub>x</sub> (x: denotes the mass content of AP) aerogel composites present an isotropic “lamella-honeycomb” porous structure, which endows them with excellent comprehensive performance. With the AP content increasing, the extremely low density is kept, ranging between 67–73 mg/cm<sup>3</sup>, and the low thermal conductivity is maintained within 40.9–47.9 mW·m<sup>−1</sup>·K<sup>−1</sup>. The mechanical strength is significantly improved with the maximum compressive modulus increasing from 2.95 to 5.96 MPa and the specific modulus rising from 44.03 to 81.64 MPa∙cm<sup>3</sup>/g. Their detailed heat transfer process has been analyzed, which provides a deep understanding to the low thermal conductivity of the PVA-MMT-AP<sub>x</sub> aerogel composites. Based on the combination of thermogravimetric analysis and combustion behavior, the PVA-MMT-AP<sub>x</sub> aerogel composites are demonstrated to possess improved thermal stability and fire resistance. This study puts forward a facile approach to utilizing AP to reinforce clay aerogel composites, which provides new insight into the development of thermal-insulating, fire-safe and high-strength thermal insulation materials. |
| first_indexed | 2024-03-09T20:11:31Z |
| format | Article |
| id | doaj.art-47066e231c8442e4aa10bb8fa6a082c3 |
| institution | Directory Open Access Journal |
| issn | 2310-2861 |
| language | English |
| last_indexed | 2024-03-09T20:11:31Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj.art-47066e231c8442e4aa10bb8fa6a082c32023-11-24T00:13:44ZengMDPI AGGels2310-28612022-10-0181065410.3390/gels8100654Aramid Pulp Reinforced Clay Aerogel Composites: Mechanical, Thermal and Combustion BehaviorXiaowu Wang0Yang Wang1Mengtian Sun2Guichao Wang3Qiong Liu4Ming Li5Yury M. Shulga6Zhi Li7School of Resource and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resource and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resource and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resource and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resource and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resource and Safety Engineering, Central South University, Changsha 410083, ChinaInstitute of Problems of Chemical Physics, Russian Academy of Sciences, 142432 Chernogolovka, RussiaSchool of Resource and Safety Engineering, Central South University, Changsha 410083, ChinaIn this work, we reported that aramid pulps (AP) reinforced clay aerogel composites with improved mechanical strength, good thermal insulation and fire resistance based on the combination of AP, Poly(vinyl alcohol) (PVA) and sodium montmorillonite (MMT), which present a promising prospect in the thermal insulation application. The PVA-MMT-AP<sub>x</sub> (x: denotes the mass content of AP) aerogel composites present an isotropic “lamella-honeycomb” porous structure, which endows them with excellent comprehensive performance. With the AP content increasing, the extremely low density is kept, ranging between 67–73 mg/cm<sup>3</sup>, and the low thermal conductivity is maintained within 40.9–47.9 mW·m<sup>−1</sup>·K<sup>−1</sup>. The mechanical strength is significantly improved with the maximum compressive modulus increasing from 2.95 to 5.96 MPa and the specific modulus rising from 44.03 to 81.64 MPa∙cm<sup>3</sup>/g. Their detailed heat transfer process has been analyzed, which provides a deep understanding to the low thermal conductivity of the PVA-MMT-AP<sub>x</sub> aerogel composites. Based on the combination of thermogravimetric analysis and combustion behavior, the PVA-MMT-AP<sub>x</sub> aerogel composites are demonstrated to possess improved thermal stability and fire resistance. This study puts forward a facile approach to utilizing AP to reinforce clay aerogel composites, which provides new insight into the development of thermal-insulating, fire-safe and high-strength thermal insulation materials.https://www.mdpi.com/2310-2861/8/10/654aramid pulpsclay aerogelmechanical propertiesthermal propertiescombustion behavior |
| spellingShingle | Xiaowu Wang Yang Wang Mengtian Sun Guichao Wang Qiong Liu Ming Li Yury M. Shulga Zhi Li Aramid Pulp Reinforced Clay Aerogel Composites: Mechanical, Thermal and Combustion Behavior Gels aramid pulps clay aerogel mechanical properties thermal properties combustion behavior |
| title | Aramid Pulp Reinforced Clay Aerogel Composites: Mechanical, Thermal and Combustion Behavior |
| title_full | Aramid Pulp Reinforced Clay Aerogel Composites: Mechanical, Thermal and Combustion Behavior |
| title_fullStr | Aramid Pulp Reinforced Clay Aerogel Composites: Mechanical, Thermal and Combustion Behavior |
| title_full_unstemmed | Aramid Pulp Reinforced Clay Aerogel Composites: Mechanical, Thermal and Combustion Behavior |
| title_short | Aramid Pulp Reinforced Clay Aerogel Composites: Mechanical, Thermal and Combustion Behavior |
| title_sort | aramid pulp reinforced clay aerogel composites mechanical thermal and combustion behavior |
| topic | aramid pulps clay aerogel mechanical properties thermal properties combustion behavior |
| url | https://www.mdpi.com/2310-2861/8/10/654 |
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