Nanowerk reports that researchers have fabricated a film exhibiting asymmetric wettability—in other words, a film with both a superhydrophobic and a hydrophilic layer. Potentially suitable for wound-care applications, the technology could serve as a medical dressing in which the superhydrophobic surface on top protects the wound from dust and bacteria while the hydrophilic surface at the bottom delivers drugs that can accelerate wound healing or help avoid infections, according to Jian Ji, a professor in the department of polymer science engineering at Zhejiang University (Hangzhou, China).
The superhydrophobic surface is self-cleaning, antiwetting, and capable of limiting bacterial adhesion, while the hydrophilic surface can deliver antibacterial silver ions, Nanowerk notes. In addition, the film can be transferred to another interface, such as skin.
Ji comments that that the antiadhesion capability of the top surface results from the film’s combination of micro-nano hierarchical structure and superhydrophobicity, characteristics that promote antibacterial adhesion. The microstructure on the film ranges in size from 2 to 5 µm, Ji adds, which is close to the size of E. coli.
- Changing a Colorant in an Approved Medical Device, What Should I Know? - Webcast
- Reduce Risk! Control Costs! Get to Market Faster! The Customer Solution Centre is Your Pathway to Successful Device Development. - Webcast
- Innovating within Cost Constraints to Get More Bang for Your Buck - Webcast
- Conformal Coatings for Tomorrow’s Medical Technologies - Webcast
- ISO80369 Standards Bring Changes to Medical Device Companies - Webcast
- Automation in Machining - Webcast