Three-Dimensional Graphene Hybrid SiO2 Hierarchical Dual-Network Aerogel with Low Thermal Conductivity and High Elasticity
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. GSA Fabrication
2.3. Characterizations and Measurements
3. Results
3.1. Microstructural Characterizations
3.2. Chemical Composition and Structural Analysis
4. Discussion
4.1. Investigation of Thermal-Conductivity Properties
4.2. Thermal-Insulation, Flame-Resistance, and Thermal-Stability Studies
4.3. Investigation of Mechanical Properties
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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GSA-x | x = 0 | x = 1 | x = 5 | x = 10 | x = 20 | x = 30 | x = 40 |
---|---|---|---|---|---|---|---|
Bulk density (mg/cm3) | 6.2 | 15.3 | 82.3 | 133.1 | 250.3 | 403.2 | 532.1 |
Relative density (ρGASs/ρair) | 4.8 | 11.8 | 63.7 | 102.9 | 193.6 | 311.8 | 411.5 |
SiO2 content (wt %) | 0 | 59.5 | 92.5 | 95.3 | 98.5 | 98.5 | 98.8 |
Strain | Graphene Hybrid SiO2 Aerogels (GSA-x) | ||||||
---|---|---|---|---|---|---|---|
x = 0 | x = 1 | x = 5 | x = 10 | x = 20 | x = 30 | x = 40 | |
20% | 0.0026 | 0.0060 | 0.0158 | 0.0228 | 0.0376 | 0.0455 | 0.0964 |
40% | 0.0041 | 0.0078 | 0.0235 | 0.0309 | 0.0566 | 0.0569 | 0.2390 |
60% | 0.0067 | 0.0107 | 0.0387 | 0.0504 | 0.1218 | 0.1221 | 1.0332 |
80% | 0.0170 | – | – | – | – | – | – |
GSA-x | x = 0 | x = 1 | x = 5 | x = 10 | x = 20 | x = 30 | x = 40 |
---|---|---|---|---|---|---|---|
Young’s modulus (MPa) | 0.023 | 0.074 | 0.202 | 0.267 | 0. 307 | 0.537 | 0.857 |
Elastic strain (%) | 80 | 50 | 30 | 20 | 12 | 8 | 6 |
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Zhang, L.; He, P.; Song, K.; Zhang, J.; Zhang, B.; Huang, R.; Zhang, Q. Three-Dimensional Graphene Hybrid SiO2 Hierarchical Dual-Network Aerogel with Low Thermal Conductivity and High Elasticity. Coatings 2020, 10, 455. https://doi.org/10.3390/coatings10050455
Zhang L, He P, Song K, Zhang J, Zhang B, Huang R, Zhang Q. Three-Dimensional Graphene Hybrid SiO2 Hierarchical Dual-Network Aerogel with Low Thermal Conductivity and High Elasticity. Coatings. 2020; 10(5):455. https://doi.org/10.3390/coatings10050455
Chicago/Turabian StyleZhang, Liwei, Peng He, Kunkun Song, Jingxiang Zhang, Baoqiang Zhang, Ruixian Huang, and Qiangqiang Zhang. 2020. "Three-Dimensional Graphene Hybrid SiO2 Hierarchical Dual-Network Aerogel with Low Thermal Conductivity and High Elasticity" Coatings 10, no. 5: 455. https://doi.org/10.3390/coatings10050455