Method for preparing antifouling surface from organic-inorganic hybrid particle grafted lubricating oil

Abstract

The invention discloses a method for preparing an antifouling surface from organic-inorganic hybrid particle grafted lubricating oil, belonging to the technical field of nanometer antifouling coatings. The preparation method comprises the following steps: firstly, preparing vinyl modified silicon dioxide by adopting a sol-gel one-pot method, and selecting proper reaction monomers and initiators to coat the surface of the vinyl modified silicon dioxide so as to introduce reaction groups on the surface and prepare organic-inorganic hybrid core-shell structure particles; then assembling the organic-inorganic hybrid core-shell structure particles onto a base material by using a dip-coating-baking method so as to stably fixing the particles on the surface of a substrate; and then grafting polydimethylsiloxane with an active end group to active sites of hybrid particles through a covalent grafting reaction so as to prepare the stable super-smooth antifouling surface with a self-repairing function. The prepared super-smooth antifouling surface can meet the antifouling requirements of a common base material, and is good in stability and simple and convenient in application process.

Description

technical field [0001] The invention relates to a method for preparing an antifouling surface by grafting lubricating oil with organic-inorganic hybrid particles, and belongs to the technical field of nano antifouling coatings. Background technique [0002] Slippery liquid infused porous surfaces (SLIPS) is a new type of protective surface with unique wetting properties, which shows broad application prospects in the fields of liquid repellency and antifouling such as medical equipment, optical equipment and marine ships. However, in the actual use process, there are still many problems that cannot be overcome on the surface of SLIPS: 1) Under the action of external force damage, seawater erosion, etc., the matrix structure of the super-slippery surface is easily damaged and defects such as microcracks appear, thereby reducing the use of the substrate. 2) Under the action of ray irradiation and fluid scouring, the oil film on the surface has the phenomenon of molecular volat...

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Problems solved by technology

However, in the actual use process, there are still many problems that cannot be overcome on the surface of SLIPS: 1) Under the action of external force damage, seawater erosion, etc., the matrix structure of the super-slippery surface is easily damaged and defects such as microcracks appear, thereby reducing the use of the substrate. 2) Under the action of ray irradiation and fluid scouring, the oil film on the surface has the phenomenon of molecular volatilization, diffusion, dissolution, entrainment, etc., which leads to the loss and failure of the oil film

For example: Hozumi et al. grafted trimethylsiloxy-terminated polymethylhydrogensiloxane (PMHS) on a smooth metal surface by simple heat treatment, but the lubricating film grafted on the surface is usually thin and very Vulnerable to damage; Inspired by SOCAL coating, Liu et al. developed nano-sized grafted lubrication pool coating (NP-GLIDE), the covalent bonding of lubricating oil in the polymer makes NP-GLIDE coating have excellent lubricating oil film Durability and mechanical stability, however, since the PDMS chains are not completely free, the lubricant flow on the NP-GLIDE coated surface is poor

There are also some scholars who absorb and encapsulate lubricants into coatings or polymer matrices assembled by organic polymer nanoparticles. Detergent performance polymer coatings that exhibit excellent lubricating oil affinity, however, inherent swelling of the polymer after oil absorption leads to loss of structural strength

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