Durable superamphiphobic nano-silica/epoxy composite coating via coaxial electrospraying method
Abstract
In this study, a durable superamphiphobic nano-silica and epoxy composite coating with good environment resistant was successfully fabricated. Fluorinated nano-silica with low surface energy was prepared by in situ sol-gel method, which can be stably dispersed in the solution. Applying fluorinated nano-silica dispersion as sheath and epoxy solution as core, fluorinated nano-silica/epoxy superamphiphobic composite coating was prepared by a coaxial electrospraying method. Fluorinated nano-silica with uniform nano-size was distributed evenly on the micro epoxy particles, showing a special micro-nano hierarchical structure. Nano-indentation shows evident improvement in modulus and hardness of fluorinated nano-silica/epoxy composite coating than that of raw epoxy. In addition, durability of the superamphiphobic coating was assessed by performing harsh chemical environments immersion and scotch tape test.
- Publication:
-
Applied Surface Science
- Pub Date:
- April 2018
- DOI:
- 10.1016/j.apsusc.2017.11.241
- Bibcode:
- 2018ApSS..436..283L
- Keywords:
-
- Superamphiphobic;
- Fluorinated nano-silica;
- Epoxy;
- Composite coating;
- Coaxial electrospraying