Fabrication of Robust Underwater Superoleophobic Copper Mesh with Tunable Oil Adhesion †

doi:10.7503/cjcu20190514

Abstract

Abstract:

A series of underwater superoleophobic copper meshes with tunable oil adhesion were fabricated by adjusting the time of eletrodeposition copper on copper mesh. Furthermore, after coating a layer of rigid aluminum dihydrogen phosphate(ADP) onto the as-prepared copper meshes, the mechanical stability of the microstructure on the copper meshes were effectively enhanced while maintaining the original microstructure morphology and oil adhesion property unchanged. The different oil adhesion of as-prepared copper meshes could be ascribed to the difference of surface microstructures that results in different solid/oil contact model in water. Theoretical simulations analysis reveals that the enhanced effect of surface microstructure results from the coating is due to the decreases the maximum transverse deformation and stress on the microstructure.

Key words: Underwater superoleophobicity, Tunable adhesion, Electrodeposition copper, Abrasion resistance

CLC Number:

O647
O614

TrendMD:

LI Chong,CHENG Zhongjun,AN Maozhong. Fabrication of Robust Underwater Superoleophobic Copper Mesh with Tunable Oil Adhesion ^†[J]. Chem. J. Chinese Universities, 2020, 41(1): 125.

Figures/Tables 11

Fig.1 SEM images of copper mesh before(A) and after(B—E) electrodeposition of copper with different time and XRD patterns of the obtained films(F) (B) Deposition time: 2 s; (C) magnified image of (B); (D) deposition time: 15 s; (E) magnified image of (D).

Fig.2 Statistics of oil contact angles and sliding angles on different kinds of copper mesh about 1,2-dichloroethane(A) and other oils(B) (A) The insets are the pictures of oil droplet(1,2-dichloroethane) on the corresponding copper mesh.

Fig.3 Photograph of the experimental setup for the sand impingement test(A) and SEM image of sand grains used in the test(B)

Fig.4 SEM images of different kinds of copper mesh after sand impingement test (A) S1; (B) S2; (C) S3.

Fig.5 Statistics of oil(1,2-dichloroethane) sliding angles on different kinds of copper mesh after abrasion

Fig.6 SEM images of different kinds of copper mesh with ADP coating before(A—C) and after(D—F) abrasion (A, D) S1; (B, E) S2; (C, F) S3. The inset of (C) is the TEM image.

Fig.7 Element distribution maps of copper mesh(S3) with ADP coating (A) Cu; (B) Al; (C) P; (D) O.

Fig.8 Statistics of oil(1,2-dichloroethane) sliding angles on different kinds of copper mesh with ADP coating after abrasion

Fig.9 Statistics of oil(1,2-dichloroethane) contact angles and sliding angles(A) and SEM images(B—D) of copper mesh with ADP coating after immersing in water at different temperatures for 5 h and abrasion (B) 0 ℃; (C) 25 ℃; (D) 100 ℃.

Fig.10 Schematic illusion of oil/water/solid wetting model on different kinds of underwater copper mesh (A) S1; (B) S2; (C) S3.

Fig.11 Schematic illusion the results analysis by ABAQUS (A) and (C) are the transverse(nm) deformation of single microstructure model without and with ADP by finite-element model, respectively. (B) and (D) are the stress(MPa) distribution of single microstructure model before and after coating of ADP by finite-element model, respectively.

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