The Fabrication of Multifunctional SLIPS Films by Electrospinning

Abstract

The pitcher plant has inspired anti‐wetting coatings. However, it is still a challenge to create oleophobic surfaces that repel non‐polar liquids due to their low surface tension. Here we develop an effective strategy to fabricate multifunctional fibrous films by electrospinning polyvinylidene fluoride (PVDF) and polyvinyl acetate (PVAc) polymers. The as‐prepared multifunctional films combined the Janus behavior with hydrophobicity on the upper side and thermally adhesive properties on the lower side. By spraying with lubricant, a pitcher‐plant‐like omniphobic surface has been prepared, which exhibited excellent anti‐wetting properties against water, low surface tension and complex fluids. Furthermore, the transparency of the film has been greatly enhanced after lubrication, which was suitable for glass‐based anti‐fouling materials or coatings.

Life and death of liquid-infused surfaces: a review on the choice, analysis and fate of the infused liquid layer

“…Simple optical observation can help with the detection of the lubricant loss in the case of transparent 2D LIS (their roughness means they are only transparent when lubricated), the loss of transparency can be qualitatively correlated with a loss of infused layer. 35,67,69,106,168,193,196 For more detailed analysis in a broader variety of surfaces, more sensitive and general characterisation techniques are required. Techniques reported for characterising lubricant layers fit into two broad categories: indirect and direct techniques.…”

Fabrication of Superamphiphobic Surfaces via Spray Coating; a Review

“…[87] Additionally, coatings produced using water as a solvent, which is less-environmentally-harsh than heavy organic solvents such as ethanol, n-hexane, and cyclohexane have been fabricated due to their harmlessness to the environment and low cost. [50] For example, Li et al, created a superamphiphobic PVDF composite membrane by spraying a waterborne solution consisting of fluorocarbon surfactant, fluorinated alkyl silane (FAS), and SiO 2 nanoparticles. However, this membrane showed significantly less amphiphobicity than similar coatings produced with FAS, [130] indicating the need for future research in developing more environmentally sustainable coatings.…”

Recent Developments in Slippery Liquid-Infused Porous Surface Coatings for Biomedical Applications

“…Electrospinning, as an effective method for creating porous structures, has attracted much attention from the researchers. This technique enables the deposition of micro- or nanotextured coatings by spinning hydrophobic polymers, such as polystyrene (PS), onto substrates with various shapes. − The method allows for the creation of structures with uniform aperture and superior mechanical properties, all achieved cost-effectively. , Besides, electrospinning holds promise for creating porous structures suitable for SLIPS applications, as nanofiber-based porous meshes enhance the lubricant locking capabilities compared to other porous structures . The conventional method for producing directly porous structures on a surface involves generating nanofibers through an electrostatic spinning process, leveraging the breath phase or figure separation mechanisms, without need for additional treatments.…”

“…48−52 The method allows for the creation of structures with uniform aperture and superior mechanical properties, all achieved cost-effectively. 53,54 Besides, electrospinning holds promise for creating porous structures suitable for SLIPS applications, as nanofiber-based porous meshes enhance the lubricant locking capabilities compared to other porous structures. 55 The conventional method for producing directly porous structures on a surface involves 57 To enhance the chemical compatibility between TPU and PFPE, they applied a fluorinated polymer layer on TPU nanofibers.…”