A mechanically durable slippery liquid-infused porous surface based on distinctive 'jaboticaba-like' TiO2/sepiolite nanocomposites with superior hot water repellency and anti-corrosion for protecting various substrates

被引：2

作者：

Zhu, Xuedan ^{[1
,2
]}

Yao, Yali ^{[2
]}

Li, Jiehui ^{[2
]}

Mu, Leihuan ^{[2
]}

Liu, Qinghua ^{[2
]}

Sun, Cai-Li ^{[1
]}

Zhang, Nan ^{[1
]}

He, Jinmei ^{[1
]}

Qu, Mengnan ^{[1
,2
]}

机构：

[1] Xian Univ Sci & Technol, Coll Chem & Chem Engn, Xian 710054, Peoples R China

[2] Xian Univ Sci & Technol, Coll Energy Engn, Xian 710054, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2024年 / 481卷

基金：

中国国家自然科学基金;

关键词：

SLIPS; Mechanical durability; Sepiolite; In-situ growth; Metal anti-corrosion; Hot water repellency; SUPERHYDROPHOBIC COATINGS; CORROSION PROTECTION; FABRICATION; ROBUST; TIO2; PERFORMANCE; POLYMER; SCALE; STATE; SOL;

D O I：

10.1016/j.cej.2024.148667

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Slippery liquid infused porous surfaces (SLIPS) are widely utilized due to their omniphobicity and distinctive slippery properties. Fragile mechanical properties and unstable lubricant layer of SLIPS have a substantial impact on its long-term application performance. Herein, a pre-oil-infused mechanically robust organic/inorganic composite superhydrophobic surface (SC) for SLIPS with hierarchical roughness was obtained by in-situ growing a significant amount TiO2 nanospheres on the surface of sepiolite (SEP) fiber structures via hydrogen bonding, TiO-Si covalent bonding, and electrostatic power, resulting in a unique bionic "jaboticaba-like" structure on SC. Through hydrogen bonding, the hydroxyl groups on the TiO2 surface can also interact with the cross-linked polymer PVDF-HFP (polyethylene fluoride hexafluoropropylene). In the presence of multiple interactions, SC could resist 300 cycles of a rigorous Taber rubbing test with a 500 g weight and yet retain superhydrophobicity. The prepared SLIPS have exceptional hot water (boiling water) resistance, strong shear stability (8000 rpm/min), and water jetting resistance (40 kPa). Corrosion current density of SLIPS and SC was decreased by roughly 4 orders of magnitude and 3 orders of magnitude, respectively, after exposure to 3.5 wt% NaCl solution as compared to bare aluminum substrate. SLIPS have higher long-term corrosion resistance compared to SC. Owing to the "jaboticaba-like" hierarchical structure, SLIPS have great oil-locking capabilities, as well as good mechanical stability and long-term corrosion resistance. This article offers recommendations for developing tough SLIPS for future engineering applications.

引用

页数：17