Abstract
In order to solve problems of high viscous resin adhering on machine or tool surfaces in manufacturing resin based composites, a superhydrophobic and anti-adhesive surface was prepared and investigated. Micro/nanoscale hierarchical structures in shape of volcanic vents were fabricated on high-speed steel surfaces via laser processing. After being hydrophobized by fluoroalkylsilane solution, the microprotruding surfaces showed great hydrophobicity and even superhydrophobicity, with a water contact angle of 157.2° and sliding angle of 2.8°. Besides, the surfaces also displayed low wettability and excellent anti-adhesivity for highly viscous epoxy resin, with a best resin contact angle of 149.7° and sliding angle of 7.3°. As microprotruding diameters and spacings decreased from 500 to 100 μm, and heights rose from 14 to 54 μm, both water and resin contact angles increased while sliding angles decreased. The decrease of microprotruding diameter and spacing as well as the raise of height could increase surface roughness, enlarge air-liquid interface fraction and reduce actual contact area between liquid and the steel surface. Thus the wetting mode of the microstructured surface changed from Wenzel's mode to Cassie's mode, leading to a reduction of wettability and an enhancement of anti-resin-adhesivity on the surface.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
