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| Preparation and Properties of Flame Retardant and Thermal Insulation Tunicate Cellulose Nanocrystal-based Aerogel |
| Received:April 11, 2023 |
| DOI：10.11980/j.issn.0254-508X.2023.09.003 |
| Key Words:tunicate cellulose nanocrystals graphene oxide sepiolite flame retardant thermal insulation aerogel |
| Fund Project:国家自然科学基金（22078061）；福建省科技厅指导项目（2018H0006）；生物基材料与绿色造纸国家重点实验室（齐鲁工业大学）开放基金项目（KF201922）。 |
| Author Name | Affiliation | Postcode | | LIN Weijie | School of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | NING Dengwen | School of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108
Yibin Forestry and Bamboo Industry Research Institute, Yibin, Sichuan Province, 644000 | 644000 | | ZOU Qiuxia | School of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | WU Shuai | School of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | XU Dezhong | School of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | HUANG Fang* | School of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 |
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| Abstract:Tunicate cellulose nanocrystals （TCNC）， graphene oxide （GO） and sepiolite （SEP） were used as raw materials， the glutaraldehyde was used as adhesion agent with water as solvent to prepare the flame retardant and thermal insulation aerogel TCNC/SEP/GO by direct freeze-drying technique. The results showed that the optimum conditions for the preparation of aerogel TCNC/SEP/GO were GO content of 10% via directed freeze-forming at -196 ℃. At a compressive strain of 0.5， compared to pure TCNC aerogel， the prepared aerogel TCNC/SEP/GO （GO content of 10%） had about 50% increase in compressive stress and 23% decrease in the thermal conductivity with the freeze-forming temperature decreased. In the vertical combustion test， the pure TCNC aerogel extinguished in 9 s， while the aerogel TCNC/SEP/GO （GO content of 10%） extinguished in 0.42 s. In addition， when the latter was immersed in ethanol， it appeared to be extinguished at 12 s， with original form after extinguishing. |
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