Cinnamaldehyde grafted porous Aerogel-Organ gel liquid infused surface for achieving difunctional long-term dynamic antifouling.

[Display omitted] • Silica aerogel was grown on the surface of porous polymer membrane, and the nanoscale pores of aerogel segmented the larger micron-scale pores on the coating surface to slow down the loss rate of lubricant. • The low surface energy and fluidity of the lubricant and the antibacterial properties of grafted cinnamaldehyde are used to realize the physical and chemical difunctional antifouling strategy. • The obtained coating has a huge lubricant storage capacity and impressive surface lubricant layer stability, and exhibited an excellent performance in long-term anti-biofouling. Marine biofouling caused a number of questions about energy consumption and safety. While there were still some challenges in developing an environmentally friendly, non-toxic and long-term antifouling slippery liquid-infused porous surface (SLIPS). Here, we proposed a difunctional antifouling strategy via constructing porous polydimethylsiloxane (PDMS) surface with a layer of aerogel by sol-gel method and grafted cinnamaldehyde chemically. The improvement in structure enhanced the liquid storage stability of coating, which in turn increases its anti-bioadhesive ability. In addition, the grafted cinnamaldehyde could also be used to act as a chemical antibacterial and is intelligently released in the face of harsh fouling environments, which played a key role in prolonging the antibacterial lifespan of the coating. After the 120-hour anti-bacteria experiment and the 25-day anti-algae experiment, the anti- Escherichia coli (anti- E. coli) rate and the anti-algae rate of the coating reached 99.6% and 99.9%, respectively, which was attributed to the excellent long-term antifouling properties of the coating. The combination of physical and chemical antifouling property made the coating achieve long-term fouling prevention for marine engineering equipment. [ABSTRACT FROM AUTHOR]