期刊
ADVANCED ENGINEERING MATERIALS
卷 24, 期 8, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adem.202101534
关键词
aerogels; cellulose nanofibrils; fire retardancy; supramolecular assembly; thermal insulation
资金
- Canada Research Chairs program [231928]
- Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPIN-2018-06818]
- Canada Foundation for Innovation - John R. Evans Leaders Fund (CFI-JELF) [37517]
- Fundamental Research Funds for the Central Universities [BJFU-2021ZY28]
- Open Project of Beijing Key Laboratory of Big Data Decision-making for Green Development [DM202101]
By modifying cellulose nanofibril (CNF) aerogel through the supramolecular assembly of melamine (MEL) and phytic acid (PA), the inherent flammability of CNF can be addressed, and the modified aerogel exhibits good fire-retardant and thermal-insulating properties, making it a promising material for various applications.
The widespread utilization of cellulose nanofibril (CNF) has been significantly hindered by its inherent flammability. To explore the potential of using CNF aerogel as sustainable material with good fire-retardant and thermal-insulating properties, CNF aerogel is modified by in situ supramolecular assembly of melamine (MEL) and phytic acid (PA). This strategy addresses CNF's flammability and avoids the environment issues associated with the incorporation of traditional fire-retardant. The modified aerogel exhibits highly porous honeycomb structure with low density and good mechanical properties. After modification with MEL-PA, the aerogel exhibits highly improved shape integrity during burning, higher thermal stability, and favorable combustion behavior for fire retardancy. The heat transfer of the modified aerogel is well hindered, which demonstrated effective thermal insulation performance. In view of the excellent thermal and fire-retardant properties, the MEL-PA/CNF composite aerogel can be a potential fire-retardant and thermal-insulating material for applications such as clothing, building, and electronic devices.
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