Fabrication of robust superhydrophobic filter paper for oil/water separation based on the combined octadecanoyl chain bonding and polymer grafting via surface-initiated ATRP
- 20 Downloads
Effective separation of oil and water has always been a long-term challenge. Here we introduce a facile and fluorine-free method to fabricate superhydrophobic and superoleophilic filter paper without the decoration of solid particles for robust oil/water separation. After chemically bonding octadecanoyl and α-bromoisobutyryl groups on the surface of filter paper through simultaneous esterification with stearoyl chloride and α-bromoisobutyryl bromide (BiBB) to obtain C18-FP-g-Br, superhydrophobic poly(styrene-co-acrylonitrile) (SAN) grafted filter paper (C18-FP-g-SAN) was fabricated via surface-initiated atom transfer radical polymerization. The obtained C18-FP-g-SAN showed a water contact angle of 153° and achieved a separation efficiency exceeding 98.5% after ten different typical oil/water separation processes due to the synergistically combined contributions of bonded octadecanoyl chain and grafted SAN. C18-FP-g-SAN remained high separation efficiency after 10 cycles of use and treatment with strong acidic or basic solution. The excellent reusability and chemical stability of C18-FP-g-SAN promise its practical applications of continuous oil/water separation and oil spillage cleanup.
KeywordsFilter paper Oil/water separation SI-ATRP Superhydrophobicity Superoleophilicity
This work was financially supported by National Natural Science Foundation of China (51973001), the Major Program of University Natural Science Research Project of Anhui Province (KJ2019ZD01), the Key Projects of Innovation Program for Returned Scholars of Anhui Province (2019LCX006), and the Open fund for Discipline Construction, Institute of Physical Science and Information Technology, Anhui University (Grant No. 201813).
- Yu T, Xu G, Wang X, Yang J, Hu J (2014) Fabrication of oil–water separation filter paper by simple impregnation with fluorinated poly-acrylate emulsion. BioResources 9:4421–4429Google Scholar