Inspired by Flammulina velutipes, scientists developed materials with better hydrophobicity
According to foreign media reports, researchers have previously developed waterproof materials based on lotus leaf structures. However, a group of researchers now led by Associate Professor Paul Leu of the University of Pittsburgh, inspired by Flammulina velutipes, has created a flexible optical plastic with better hydrophobicity.
This material is in the form of ethylene terephthalate (PET), which deposits a layer of closely spaced tall and thin nanostructures with round spots on the top. Flammulina velutipes also has long, thin stems with a large round cap on the top.
The plastic called nano-enoki PET is transparent, and liquids such as water, milk, ketchup, coffee, and olive oil can slip off the surface. Even after 5000 bending cycles, these combined qualities still exist, and can make the material ideal for items such as solar cells and LEDs, and can even be used in wearable electronic devices or flexible lighting.
The super-hydrophobic properties of this material may also make plastics ideal for medical devices that prevent bacterial colonization and blood coagulation. Moreover, the production process can be scaled up, so it is not limited to making laboratory samples.
"The shape of the nano needle mushroom captures the air barrier between the liquid and the surface," Paul Leu said. "Liquids ultimately only touch less than 5% of the structure. Therefore, the liquids easily roll off or flake off after drying."
The researchers recently published a paper on this research in the Journal of Materials Chemistry A. The paper was co-authored by Sajad Haghanifar, Anthony Galante, David Pekker and Paul Leu from the Swanson School of Engineering and Luke M. Tomasovic of Georgia Institute of Technology.
1. Components of piston rod seal:
Polyurethane, polyformaldehyde, rubber
2. Purpose and function of piston rod seal:
The rod seal belongs to the dynamic seal. It is the seal that moves with the piston rod. It is one of the important components on the hydraulic support.
3. Use position of piston rod seal:
Guide sleeve, piston
4. Working principle of piston rod seal:
It is used at the contact part between the guide sleeve and the outer cylinder to seal the emulsion in the outer cylinder.
5. What effects will be caused by improper use or operation of piston rod seal:
1. Improper selection of cavity support material will wear the cavity and piston rod.
2. The size of the friction pair is inappropriate, causing wear.
3. Improper thread guide angle of cylinder barrel and piston end wear the sealing ring.
4. The seal ring is worn due to improper installation guide angle of the seal.
5. The surface of cavity and piston rod is rough, with scratches and worn seals.
6. The outer cylinder leaks and the jack does not maintain pressure.
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