.png){kind=icon}
.png){kind=icon}
Return
Catechol-copper coordination and graphene networks: a fluorine-free superhydrophobic coating with synergistic anticorrosion, photothermal, and anti-icing functions
.png){kind=icon}
PRE
AI
H
M
J
R
J
T
X
DOI：10.1016/j.apsusc.2026.167982.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Copper and its alloys are susceptible to chloride corrosion and low-temperature damage in marine environments, while conventional single-function coatings fail to provide adequate protection. Herein, we report a multifunctional superhydrophobic coating with coordination interfaces, comprising polydopamine (PDA) modified Al2O3 and ZrO2 micro/nano particles, copper nanoparticle-decorated reduced graphene oxide (rGO), and hydroxyl-terminated polydimethylsiloxane (PDMS)/octadecyltrimethoxysilane (OTMS). The coating exhibits a surface roughness of 201 nm, WCA of 159.1°, and SA of 4.8°. Exposed to 1 sun illumination, the coating surface temperature reached 37.4 ℃ and remained highly stable over 5 consecutive heating–cooling cycles. It also exhibits excellent anti-icing property, reducing the ice adhesion strength from 645.895 to 54.31 kPa and delaying water droplet freezing time from 29 to 344 s at −20 ℃. Electrochemical testing indicates that the Al2O3-ZrO2@PDA-rGO coating maintains the highest charge transfer resistance (Rct), with a corrosion protection efficiency of 89.5%. In this multidimensional corrosion protection system that integrates physical barrier and active passivation, catechol groups in PDA chelate copper ions to form a passivation layer inhibiting anodic dissolution, while rGO homogenizes the potential and mitigates pitting corrosion. This work offers new perspectives for designing multifunctional superhydrophobic anti-corrosion coatings integrating photothermal responsiveness and anti-icing performance for marine metallic components.
Keywords:
Superhydrophobic coating
Copper corrosion protection
Photothermal effect
Delayed freezing
Catechol-copper coordination
Journal
IF:
6.9
Papers:
6.1W
Citations:
19.4W
Organization
No organization information available
Cited Papers