Paperboard as a substrate for biocompatible slippery liquid-infused porous surfaces

Abstract

Slippery liquid-infused porous surfaces or SLIPS were first introduced in 2011 by Wong et al. who reported a bioinspired self-repairing surface with remarkable slippery properties. Generally, production of these surfaces includes fossil-based or expensive materials and processes that are available mainly in laboratory scale. In this study, slippery surfaces with sliding angles of less than 10° are obtained using fibre-based material – paperboard – that is commercially available in large-scale and also cheap compared to substrates generally used in this field. The hierarchical nanostructure that is a necessary condition for appropriate droplet mobility was obtained by the liquid flame spray method. This method is fast, scalable, has a variety of optimization parameters and can be utilized in roll-to-roll technology that is traditional in paper industry. In this work, paperboard serves not only as a substrate, but also as a reservoir for the lubricant, thus it is important to evaluate the affinity of the material for the oils and estimate the capillary movement. Therefore, Cobb and Klemm methods were used when choosing a paperboard material. In addition to synthetic oils, rapeseed oil was also utilized as a lubricant, which potentially leads to eco-friendly and recyclable slippery liquid-infused porous surfaces.

Recent advances of slippery liquid-infused porous surfaces with anti-corrosion

“…However, natural vegetable oils are undoubtedly the lubricants with the lowest environmental impact compared to synthetic oils. Mikriukova et al 142 believed that rapeseed oil is a green and eco-friendly lubricant with potential. They opted to infuse rapeseed oil into a common fibre-based material—paperboard—to prepare eco-friendly and recyclable SLIPS.…”

Nucleation-enhanced condensation and fast shedding on self-lubricated silicone organogels

“…Although spontaneous oil-water separation can be simply carried out by phase sedimentation, the release of oil and its impact on the environment have nevertheless to be carefully considered. Bio-based lubricants (extracted from plant oils) have been successfully used to infuse porous films by capillary wicking, 45,46 a process different from polymer swelling. We expect that future research will focus on advancing the design of infused bio-based polymer networks as an environmental-friendly alternative to iPDMS.…”

Permeation of vegetable oils and slippery properties of extrusion coated paperboard

“…In case of SLIPS, drop of liquid does not stick to the surface but is sliding even at a slight inclination. SLIPS can be described as solid–liquid system, consisting of a nanotextured substrate and a lubricant, which generally can include ionic liquids, 2 vegetable or synthetic oils, such as silicone oil, perfluorinated oil, 1 cottonseed, 3 olive, coconut oils 4 and rapeseed oil 5 . Nanotextured structure required for SLIPS can be achieved by various methods, for example, by sputtering, lithography or sol–gel methods.…”

“…rapeseed oil. 5 Nanotextured structure required for SLIPS can be achieved by various methods, for example, by sputtering, lithography or sol-gel methods. Unfortunately, these methods are difficult to utilize in packaging technology, furthermore, nanoparticles from the texture and excess lubricant can contaminate the product.…”