Southeastern University Zhang Youfa team "CEJ": in pure water ultra-double dredging coating progress

Recently, The Zhang Youfa team of The School of Materials of Southeast University prepared a pure water-based ultra-double dredging coating based on water-based fluorocarbon surfactants, using silane as an inducing agent and stabilizer.
so-dual dredging surface
has a wide range of applications in anti-fouling, anti-corrosion, anti-ice and other fields, the development of water-based ultra-double dredging coatings has important environmental and economic significance. When the traditional method of preparing ultra-double dredging coating, we should use expensive long chain or caged fluorine-containing organic matter, not only the preparation process is demanding, but also there are certain environmental hazards

. Reducing or even using long-chain fluosilane, reducing preparation time, temperature curing, and large-scale application of water-based ultra-double dredging coatings are important.
Zhang Youfa task force to nanoparticles and short-chain water-based fluorocarbon table as raw materials, simply applied into a film and then heated in the atmosphere of silane for 15 minutes, can make the coating from the original ultra-hydrophilic ultra-oily into ultra-double dredging. The process is simple, time-consuming and pure water, which is conducive to large-scale batch preparation.
Figure 1 The coating wetting from ultra-hydrophobic/ultra-dredging oil to ultra-double dredging transformation schematic
the coating's stable super-double dredging can even be obtained by inducing only one methyl silane. Experiments show that the chemical bonding of silane on nanoparticles not only triggers the fluorocarbon group to flip outwards, but also prevents it from flipping inward, thus giving the coating a stable super-double dredging.
Figure 2 Fluorocarbon Table Living Modifier Group Flip Verification
Figure 3 Infrared Spectroscopy and XPS Spectrograph Verification of Silane Deposited Fixed Fluorocarbon Table Active Oil Base Group
The first author of this paper is Ph.D. student Liu Ping, and the communication author is Zhang Youfa and Yu Xinquan.
this paper is supported by the national nature fund project (project number 51671055, 51676033) and the national key research and development project (2016YFC0700304).