Surface hydrophobicity and oleophilicity of hierarchical metal structures fabricated using ink-based selective laser melting of micro/nanoparticles

Nanotechnology Reviews

article

Tianyu Yu¹  Wenfeng Guo¹  Xinjian Wang¹  Junyan Liu¹  Yang Wang¹  Mingjun Chen¹ 

[1] State Key Laboratory of Robotics and System, Harbin Institute of Technology;School of Mechatronics Engineering, Harbin Institute of Technology

关键词: super-hydrophobicity;    super-oleophilicity;    selective laser melting;    additive manufacturing;    hierarchical metal structures;   

DOI  :  10.1515/ntrev-2020-0050

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Hierarchical structures have attracted considerable interest due to their super-oleophobic/super-hydrophobic behavior. However, it is rare to present a novel additive manufacturing (AM) approach to fabricate hierarchical metal structures (HMSs). A micro/nano mixture ink was deposited on a substrate and a laser was used to selectively scan the ink layer. A new layer of ink was deposited on the previous consolidation layer during manufacturing. The surfaces of the as-sintered HMSs exhibit inherently super-hydrophilic and super-oleophobic behavior with a 155° contact angle (CA) with oil. Furthermore, the HMSs were successfully turned into super-hydrophobic and super-oleophilic mode (with a 152° CA) after surface modification with a solvent-free, electrostatic polytetrafluoroethylene particle deposition. They can be used as oil/water separation media by the functional surfaces existing in the pore channels. The experimental study of HMSs shows an effective removal of oil contaminants from water. The developed process also possesses an advantage of AM of HMSs with complex shapes in ambient air under the protection of an organic ink. Importantly, the present approach could be extended to a vast number of HMSs, for the preparation of highly durable functional materials for various applications.

【 授权许可】

CC BY