Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 388, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2019.121804
Keywords
Directional freeze-drying; Oil absorption; Cellulose-based aerogel; Mechanical property; Recyclability
Categories
Funding
- Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University), Ministry of Education [SWZ-ZD201906]
- National Natural Science Foundation of China [31770607]
Ask authors/readers for more resources
In increasingly serious marine pollution environment, environmentally friendly low-density aerogels have become potential oil-water separation materials. However, many reported aerogels have the drawbacks of low oil absorption, poor compressibility and flexibility, which limit their application. Herein, we reported a compressible, anisotropic lamellar hydrophobic and lipophilic graphene/polyvinyl alcohol/cellulose nanofiber carbon aerogel (a-GPCCA) prepared by directional freeze-drying and carbonization processes. The synthetic ultralight aGPCCA had low density (6.17 mg/cm(3)) and high porosity (99.61 %). Moreover, directional freeze-drying resulted in a lamellar interpenetrated three-dimensional porous structure, which endowed it with high adsorption capacity (155-288 times of its weight), good compressibility (95 % recovery after repeating 15 cycles at 50 % strain in parallel to the freezing direction) and recyclability (oil retention rate reached 88.8 % after 10 absorption-compression cycles). Furthermore, carbonization provided it with excellent thermal stability and hydrophobic properties, resulting in oil-water selectivity and combustion cyclicity (the oil absorption capacity was reduced by only 10.2 % after 10 absorption-combustion cycles). Therefore, the a-GPCCA obtained in this study possesses a promising potential in the field of treatment of offshore oil spills and domestic industrial wastewater.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available