Highly Compressible and Lightweight Al2O3/PCNF@ANF Aerogels for Effective Oil Adsorption and Separation 


Vol. 25,  No. 6, pp. 2375-2387, Jun.  2024
10.1007/s12221-024-00539-y


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  Abstract

Due to the lightweight feature, superior hydrophobic and oleophilic property, as well as remarkable adsorption capability, carbon-based aerogels have become appealing adsorbents for removing leaking oils and toxic organic contaminants. Herein, a highly compressible and lightweight hybrid aerogels were fabricated with organic aramid nanofibers (ANF) and inorganic Al2O3-doped honeycomb-like porous carbon nanofibers (Al2O3/PCNF) through a freeze-drying method. Thanks to the organic–inorganic hybridization approach, the optimal Al2O3/PCNF@ANF aerogels achieved excellent mechanical compressibility, maintaining over 95% of the compressive stress after 100 cycles with a 40% strain. Besides, benefiting from the macroscopic macro-porous lamellar structure of aerogels and microscopic hierarchical porous structure of Al2O3/PCNF, an extremely low density of 0.0178 g/cm3 was achieved. As oil-adsorption material, the aerogels displayed outstanding adsorption capacity for various organic solvents and oils, especially for dichloromethane of 71.8 g g-1, which was as high as 72 times than the weight of original aerogels. Furthermore, the adsorbed oils or organic solvents could be recovered through simple mechanical squeezing, while maintaining a high oil-adsorption efficiency of 90.01% over 10 cycles. Moreover, it could continuously separate dichloromethane from dichloromethane-water mixture with high flux of 10,559 L.m-2.h-1, even for surfactant-stabilized water-in-n-heptane emulsions of 5807 L.m-2.h-1. Such a well-designed Al2O3/PCNF@ANF aerogels were expected to be a promising economical and efficient oil adsorption and separation material.

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  Cite this article

[IEEE Style]

L. Han, Y. Wang, X. Zhou, L. Zhu, X. Shan, W. Cui, Y. Gao, L. Lyu, "Highly Compressible and Lightweight Al2O3/PCNF@ANF Aerogels for Effective Oil Adsorption and Separation," Fibers and Polymers, vol. 25, no. 6, pp. 2375-2387, 2024. DOI: 10.1007/s12221-024-00539-y.

[ACM Style]

Lu Han, Yi-Fan Wang, Xing-Hai Zhou, Lin Zhu, Xi-Ya Shan, Wen-Qi Cui, Yuan Gao, and Li-Hua Lyu. 2024. Highly Compressible and Lightweight Al2O3/PCNF@ANF Aerogels for Effective Oil Adsorption and Separation. Fibers and Polymers, 25, 6, (2024), 2375-2387. DOI: 10.1007/s12221-024-00539-y.

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pISSN : 1229 - 9197
eISSN : 1875 - 0052

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