TY - JOUR
T1 - Study on oil-water separation of selective-wettability meshes with different Micro/Nano structures
AU - Yuan, Jia
AU - Cui, Chenyi
AU - Qi, Baojin
AU - Wei, Jinjia
AU - Qaisrani, Mumtaz A.
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/1/2
Y1 - 2020/1/2
N2 - In order to study the oil-water separation ability of meshes with selective-wettability, three types of meshes with micro-flower structure, nano-needles structure and the composite structure of micro flowers and nano-needles were successfully fabricated by in situ displacement and oxidative modification methods. The effects of microstructure, surface wettability and the liquid components on the separation performance, permeation pressure and liquid flux of meshes were then experimental studied. The experimental results showed that the efficiencies of the three meshes for separating various oil-water mixtures reached more than 99.8%, but the separation efficiency of the Cu(OH)2-CS (Cu(OH)2 on the Copper Substrate) mesh and Cu(OH)2-SSS (Cu(OH)2 on Stainless Steel Substrate) mesh were obviously higher than the Cu-SSS (Cu on Stainless Steel Substrate) mesh after 10 times separation because of the better mechanical strength of the rough structures. By comparison, it was found that the separation efficiency of the Cu(OH)2-CS mesh was slightly higher than that of the Cu(OH)2-SSS mesh. But in turn, the Cu(OH)2-SSS mesh presented a higher permeation pressure and higher liquid than other two meshes owing to the combined effects of micro-nano structure and surface wettability. Moreover, the results of separation for multi-component oil-water mixture indicated that the TOC values of Cu-SSS and Cu(OH)2-CS meshes were 21.4% and 31.2% higher than the mean values of the two oils, but TOC value of Cu(OH)2-SSS mesh is about 4.3% lower than the mean value. However, all the fabricated meshes still maintained very high separation efficiencies. In short, all these good performances demonstrate that the prepared meshes, especially Cu(OH)2-SSS mesh with micro-nano structure, have a very broad application prospects.
AB - In order to study the oil-water separation ability of meshes with selective-wettability, three types of meshes with micro-flower structure, nano-needles structure and the composite structure of micro flowers and nano-needles were successfully fabricated by in situ displacement and oxidative modification methods. The effects of microstructure, surface wettability and the liquid components on the separation performance, permeation pressure and liquid flux of meshes were then experimental studied. The experimental results showed that the efficiencies of the three meshes for separating various oil-water mixtures reached more than 99.8%, but the separation efficiency of the Cu(OH)2-CS (Cu(OH)2 on the Copper Substrate) mesh and Cu(OH)2-SSS (Cu(OH)2 on Stainless Steel Substrate) mesh were obviously higher than the Cu-SSS (Cu on Stainless Steel Substrate) mesh after 10 times separation because of the better mechanical strength of the rough structures. By comparison, it was found that the separation efficiency of the Cu(OH)2-CS mesh was slightly higher than that of the Cu(OH)2-SSS mesh. But in turn, the Cu(OH)2-SSS mesh presented a higher permeation pressure and higher liquid than other two meshes owing to the combined effects of micro-nano structure and surface wettability. Moreover, the results of separation for multi-component oil-water mixture indicated that the TOC values of Cu-SSS and Cu(OH)2-CS meshes were 21.4% and 31.2% higher than the mean values of the two oils, but TOC value of Cu(OH)2-SSS mesh is about 4.3% lower than the mean value. However, all the fabricated meshes still maintained very high separation efficiencies. In short, all these good performances demonstrate that the prepared meshes, especially Cu(OH)2-SSS mesh with micro-nano structure, have a very broad application prospects.
KW - Micro/nano structures
KW - Oil-water separation
KW - Selective wettability
KW - Superhydrophilicity
KW - Underwater-superoleophobicity
UR - https://www.scopus.com/pages/publications/85072921976
U2 - 10.1016/j.colsurfa.2019.124026
DO - 10.1016/j.colsurfa.2019.124026
M3 - 文章
AN - SCOPUS:85072921976
SN - 0927-7757
VL - 584
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
M1 - 124026
ER -