期刊
ADVANCED COMPOSITES AND HYBRID MATERIALS
卷 4, 期 3, 页码 459-468出版社
SPRINGERNATURE
DOI: 10.1007/s42114-021-00289-y
关键词
Nanocellulose; Nanochitosan; Reduced graphene oxide; Nanocomposite aerogel; Oil adsorption
资金
- Foundation of the National Key Research and Development Program of China [2017YFA0204600]
- Shanghai Rising Star Program [19QA1409400]
- Shanghai Science and Technology Commission [19DZ2271500]
This study improved the hydrophobic properties and adsorption capacity of nanocellulose aerogel by incorporating nanochitosan and reduced graphene oxide, resulting in a nanocomposite aerogel with excellent porous microstructures and adsorption capacities. This aerogel showed potential for efficient removal of oil from wastewater and organic solvent adsorption.
In this work, in order to ameliorate the hydrophobic property and adsorption capacity of nanocellulose (NC) aerogel, the nanochitosan (NCS) and reduced graphene oxide (rGO) have been introduced into the NC aerogel to construct the NC/NCS/rGO nanocomposite aerogel by a hydrothermal method combined with freeze-drying method. The optimal conditions including the effect of NC and NCS weight percentages for preparation of NC/NCS/rGO nanocomposite aerogel with good porous microstructures and excellent adsorption capacities have been evaluated. The results demonstrate that the NC/NCS/rGO nanocomposite aerogel produced under the fabrication condition of 0.1 wt% NCS and 0.05 wt% NC exhibits a very low density of 9.3 mg cm(-3), a high hydrophobicity with a large water contact angle (115.26 degrees) and the high adsorption capacities of 171.85 +/- 3.02, 159.64 +/- 1.83, 153.22 +/- 2.92, 149.60 +/- 6.26, 139.93 +/- 3.69, 132.47 +/- 3.45, 176.82 +/- 4.66, 128.70 +/- 0.69, and 120.34 +/- 5.57 g g(-1) to mineral oil, sesame oil, acetone, ethyl acetate, thiophene, pump oil, waste pump oil, kerosene, and ethyl alcohol, respectively. In addition, this aerogel adsorbent could efficiently and continuously remove/collect the oil from wastewater confirmed by a designed oil/water pump apparatus. As a consequence, this NC/NCS/rGO nanocomposite aerogel has a potential application in the oil and organic solvent adsorption.
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