Fabrication of UV-curable fluorosilicone coatings
A new paper reports on the fabrication of fluorosilicone coatings with impressive hydrophobicity and solvent resistance as promising special protective coatings for printed circuit boards.
The application of the resign as protective coatings in the field of printed circuit board (PCB) was explored. Image source: blickpixel - Pixabay (symbol image).
-Novel UV-curable methacrylate functionalised fluorosilicone resin (MAFSR) and sulfhydryl functionalised fluorosilicone resin (SFSR) were synthesised respectively. The molecular structure, UV curing process, thermal properties and surface properties were studied. Further application as protective coatings in the field of printed circuit board (PCB) was explored.
Excellent hydrophobicity
Results show that the MAFSR with more than 30 wt % SFSR possess a high carbon-carbon double bonds conversion above 95 % after 15 s UV exposure. Besides, the surface energy of the coatings is as low as 11.5 mN/m, showing excellent hydrophobicity. The XPS results further reveal that the migration and orientation of the fluorine groups to the surface is an intrinsic reason for low surface energy. In addition, the coatings also demonstrate excellent heat resistance and solvent resistance. The study shows that UV-curable fluorosilicone resins are presumably promising special protective coatings for PCB.
The paper has been published in Progress in Organic Coatings, Volume 144, July 2020.
Image source: Pixabay.
