Southeast University Zhang Friends of the family law team to make progress in the field of super-hydrophobic coating

Superhydrophobic coatings has important and wide range of applications in the aerospace, refrigeration, petrochemical, construction and environmental protection and other fields, but in the wear and tear, scratches and other external mechanical forces easily damaged coating, and difficult to repair. Superhydrophobic coating to enhance the wear resistance has been one of the areas of materials science and other international cutting-edge research. For this reason, Southeast School of Materials Zhang Friends of the Act team has done a lot of work in terms of wear-resistant super-hydrophobic materials design, preparation of regulatory, research and other related features and interface mechanism and has made a series of research results, on recently in the Advanced Materials Interfaces , Langmuir , Soft Matter , Chemical Engineering Journal and other periodicals published papers.

1, Primer – Preparation Method composite multifunctional paint superhydrophobic coating

through the key FEVE -NH-R resin and a urethane group -NCO groups in the PU bonding, and a reinforcing silica powder doped constructed of high strength, toughness, and matrix resin composite primer prison, significantly improve the thermal, chemical and mechanical stability of the nanoparticles superhydrophobic coatings, can be used to filter air pollution, and long-acting anti-icing occasions circulation water separation. Tests show that the filter – 5 times after cleaning, with a material coating weight gain is still less than 5%, while the untreated surface has more than 20%; 500g load 100 turns the instrument cycle abrasion, shearing forces which are still ice less than 100 kPa; after 55 cycles oil-water separation, separation efficiency is still higher than 97.5%. The paper published online in the journal Wiley\’s famous table interface areas Advanced Materials Interfaces on, and was elected to the current cover paper (Adv. Mater. Interfaces, 2020, 20200013), PhD Xiao Zhen and Zhu Haiyan as a co-first author of the paper.

东南大学张友法团队在超疏水涂层领域取得系列进展
Method 1 Preparation of a bottom surface of the composite wear resistant cover superhydrophobic coating journal, a-b wheel wear, freezing and thawing cycleCd wettability and adhesion strength changes ice ring

Articles link: https: //doi.org/10.1002/admi.202000013

2, the bottom one Prepared resistant antifriction grinding superhydrophobic coating

researchers primer paint by mixing, using superhydrophobic coating step has superior wear resistance prepared by spraying method. It found, their hydrophobicity sulfide, and to enhance the coefficient of friction-reducing coating of the roughness, the main strengthening mechanism is synergy of the coating (FIG. 2). The paper published online in the journal ACS\’s old classic Langmuir, and was elected to the current supplementary cover paper (Langmuir 2019, 35, 6650-6656).

东南大学张友法团队在超疏水涂层领域取得系列进展
FIG 2 Preparation bottom one superhydrophobic coating on friction and wear journal covers, wheel wear ab before and after 4: 1 ratio change in coating appearance, coating the surface roughness and C before and after abrasion contrast

Articles link: https: //doi.org/10.1021/acs.langmuir.9b00690

3, electrostatic powder prepared by Method wear superhydrophobic coating

subsequently, the organic fluoride powder particles and nano-SiO2 particles are mixed, electrostatic powder prepared by a powder superhydrophobic coatings; the results showed that, on the one hand because of the fluorinated particles increase in viscosity is difficult to heat-curing the coating leveling micro-nano composite structure is formed, on the other hand increases the superhydrophobic surface of the coating enrichment, thereby increasing the stability of the coating. The research work has been Soft Matter Yaogao editor of the magazine, and was elected to the back cover of the current paper (Soft Matter 2019, 15, 7374-7380).

东南大学张友法团队在超疏水涂层领域取得系列进展
3 a bottom surface of the electrostatic powder THE HIGH-one Prepared FIG amphiphobic coating journals cover, when external force ab harsh external forces and conventional stabilization mechanisms superhydrophobic coating and its variations cd

papers link: https: //doi.org/10.1039/C9SM01278H

4,After soaking Preparation fixes wear superhydrophobic coating

Researchers resin mixed with the modified nanoparticles in the semi-curing process, the resin material is soaked with a diluent, it will be wrapped nanoparticles bared, in order to gain super-hydrophobicity. During rubbing, upon failure of a hydrophobic, diluent can be soaked again, this reacquisition superhydrophobic, this repair coatings applied to substrates of various materials, a wide range of applications. The study, published in the prestigious journal Chemical Chemical Engineering Journal on (Chem. Eng. J. 2019, 369, 1-7).

东南大学张友法团队在超疏水涂层领域取得系列进展
FIG 4 solvent soak microstructure self-repair schematic superhydrophobic coating, wettability, c after rubbing damage cycle of self-repairing sandpaper friction when b, d pre wear, the wear and f e from after repairing the surface morphology SEM images

papers link: https: //doi.org/10.1016/j.cej.2019.03.021

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