期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 8, 页码 10612-10622出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c22245
关键词
nature-inspired; cellulose aerogels; monolithic integrated; salt-resistance; solar desalination
资金
- National Natural Science Foundation of China [21805031]
- Fundamental Research Funds for the Central Universities [2232019G-04]
This study presents a high-performance floatable and robust cellulose aerogel-based evaporator, MiCAE, fabricated by carefully designing and integrating three functional components through heterogeneous mixing and freeze-drying aerogel fabrication process. Inspired by woods and mushrooms, MiCAE combines heat localization and suppression of heat dissipation with rapid water transportation and great salt excretion capability, offering an efficient salt-resistance solution for seawater desalination.
Solar-driven seawater desalination is a prospective approach to tackle the problem of freshwater shortage. Establishing a robust, efficient solar-thermal water evaporator with great salt-resistance through a facile and scalable fabrication technique is still a challenge. In this study, a floatable and robust monolithic integrated cellulose aerogel-based evaporator (MiCAE) with high performance is fabricated by carefully designing and integrating three functional components, namely, a hydrophilic cellulose-PVA aerogel (CPA), hydrophobic silylated cellulose aerogel (SCA), and multiwalled carbon nanotube (MCNT) coating layer (CPA@CNT), through the heterogeneous mixing and freeze-drying aerogel fabrication step in situ. Inspired by woods and mushrooms, the incorporation of SCA with mushroom-shaped CPA possessing wood-like structures in MiCAE can realize heat localization and effectively suppress irreversible heat dissipation. Meanwhile, CPA endows the evaporator with the rapid water transportation and great salt excretion capability because of its low-tortuosity porous structure. Thanks to the synergistic effect of the integrated functional structures, in the highly concentrated brine (17.5 wt %), the MiCAE can still realize the combination of high efficiency and obvious salt-resistance behavior. This work offers a facile, efficient salt-resistance solution for seawater desalination.
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